WO2024209860A1 - 硬化性オルガノポリシロキサン組成物 - Google Patents
硬化性オルガノポリシロキサン組成物 Download PDFInfo
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- WO2024209860A1 WO2024209860A1 PCT/JP2024/008398 JP2024008398W WO2024209860A1 WO 2024209860 A1 WO2024209860 A1 WO 2024209860A1 JP 2024008398 W JP2024008398 W JP 2024008398W WO 2024209860 A1 WO2024209860 A1 WO 2024209860A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
Definitions
- the present invention relates to a curable organopolysiloxane composition that can be cured with a small amount of platinum, and in particular to an organopolysiloxane composition for use in release paper or release film.
- organopolysiloxane compositions that cure through an addition reaction with a platinum catalyst can be heated at relatively low temperatures and complete their cure in a short time, and have been used in a wide range of applications, including various coating agents, base polymers for paints, binders for molded products, and adhesives.
- platinum group metals used as catalysts are rare precious metals on Earth, making them expensive, and platinum catalysts account for a large proportion of the manufacturing cost in any application. For this reason, reducing the amount of platinum group metal catalyst used is the most effective way to reduce prices.
- platinum group metal catalysts have often been used in organopolysiloxane compositions for release paper or release films at a platinum group metal concentration of 100 to 500 ppm by mass. This is because if the platinum concentration is less than 100 ppm by mass, the curing reaction does not proceed sufficiently, the cured film becomes soft, and the amount of remaining Si-H groups is large, resulting in high release strength, and the presence of unreacted raw material organopolysiloxane causes migration of the organopolysiloxane to the adhesive surface that is bonded to the release paper, resulting in a decrease in adhesive strength.
- WO 2020/004254 and WO 2020/145151 propose a method of adding a (meth)acrylic group-containing compound to a platinum-catalyzed addition curing composition. This method makes it possible to form a cured film with good peel strength and residual adhesion rate even with a smaller amount of platinum catalyst added than before.
- the present invention has been made in consideration of the above circumstances, and aims to provide a curable organopolysiloxane composition, particularly for release paper or release film, which is capable of undergoing an addition reaction with a small amount of platinum group metal catalyst, is capable of forming a cured film having the same release strength as conventional compositions, and is similarly applicable to plastic film substrates on which adhesion to a silicone cured film is difficult to obtain, and substrates on which the curing of the silicone composition by addition reaction is difficult to proceed due to reasons such as the inclusion of catalyst poison components.
- component (A) an organopolysiloxane having trivinylsiloxane units at the molecular terminals
- component (C) a compound having one or more (meth)acrylic groups per molecule
- the present invention provides the following curable organopolysiloxane composition, in particular a curable organopolysiloxane composition for release paper or release film (hereinafter sometimes simply referred to as organopolysiloxane composition).
- a curable organopolysiloxane composition containing the following components (A) to (D): (A) An organopolysiloxane having two or more silicon-bonded alkenyl groups per molecule, with an alkenyl group content of 0.001 to 0.7 mol/100 g, and having no more than three (meth)acrylic groups per molecule, wherein at least 50 mass % of component (A) is a siloxane unit in which at least one molecular terminal is represented by the following formula (1): (CH 2 ⁇ CH—) 3 SiO 1/2 (1) It is blocked off by 100 parts by mass of an organopolysiloxane having a viscosity of 7 mPa ⁇ s or more at 25° C.
- the curable organopolysiloxane composition of 1 further contains (E) a dilution solvent in an amount of 0 to 100,000 parts by mass per 100 parts by mass of component (A). 3.
- component (C) is an organopolysiloxane having one or more difunctional and/or trifunctional siloxane units having a (meth)acrylic group in one molecule.
- the present invention provides a curable organopolysiloxane composition that is capable of undergoing an addition reaction with a small amount of platinum group metal catalyst and has the same curability as conventional compositions, in particular an organopolysiloxane composition for release paper or release film that can form a cured film with the same release strength as conventional compositions.
- the component (A) of the present invention is an organopolysiloxane having two or more silicon-bonded alkenyl groups per molecule, an alkenyl group content of 0.001 to 0.7 mol/100 g, and having no more than three (meth)acrylic groups per molecule, wherein at least 50 mass % of the component (A) is a siloxane unit in which at least one molecular terminal is represented by the following formula (1): (CH 2 ⁇ CH—) 3 SiO 1/2 (1) and has a viscosity of 7 mPa ⁇ s or more at 25° C.
- organopolysiloxanes can be used alone or in appropriate combination of two or more.
- Examples of the component (A) include organopolysiloxanes having a structure represented by the following formula (2).
- M is R3SiO1 / 2
- MVi is RaP (3-a) SiO1 /2
- D is R2SiO2 /2
- DVi is RPSiO2 /2
- T is RSiO3 /2
- TVi is PSiO3 /2
- Q is SiO4 /2
- a is an integer from 0 to 3.
- the letters ⁇ , ⁇ , ⁇ , ⁇ and ⁇ are each independently 0 or a positive number, and ⁇ and ⁇ are positive numbers.
- This organopolysiloxane preferably accounts for 60% by mass or more of component (A), and more preferably accounts for 70% by mass or more. If this organopolysiloxane accounts for less than 50% by mass of component (A), the curability decreases.
- the remaining (A) component may be an organopolysiloxane represented by the above formula (2) whose molecular ends are not blocked by the monofunctional siloxane units of the above formula (1), but if more than 50% by mass is used, the curability decreases.
- each R is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 12 carbon atoms and no aliphatic unsaturated bonds, preferably having 1 to 10 carbon atoms, and more preferably having 1 to 8 carbon atoms.
- R examples include alkyl groups such as methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl, decyl, and dodecyl; cycloalkyl groups such as cyclohexyl; aryl groups such as phenyl, naphthyl, and tolyl; aralkyl groups such as benzyl and phenethyl; and groups in which some of the hydrogen atoms bonded to the carbon atoms of these groups have been replaced with halogen atoms, epoxy groups, amino groups, polyether groups, cyano groups, and hydroxyl groups.
- alkyl groups such as methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl, decyl, and dodecyl
- cycloalkyl groups such as cyclohexyl
- aryl groups such as phenyl,
- the curability and peel strength of the resulting cured product are to be low, it is preferable that 80 mol % or more of the total number of R are methyl groups. If it is necessary to further increase adhesion to the film substrate, it is preferable that 1 to 20 mol % of the total number of R are aryl groups, more preferably 1 to 15 mol %, even more preferably 1 to 10 mol %, and even more preferably 1 to 5 mol %. For industrial purposes, phenyl groups are preferably used as the aryl groups.
- R may be a (meth)acrylic group-containing group represented by the following formula (3).
- CH 2 CR 1 COR 2 - (3)
- R1 is a hydrogen atom or a methyl group, preferably a hydrogen atom.
- R2 is a divalent group represented by OR3 or R3 , where R3 is a divalent organic group having 1 to 20 carbon atoms, which may have a branched or cyclic structure, and may contain an epoxy group, an ester bond, a urethane bond, an ether bond, an isocyanate bond, or a hydroxyl group.
- R3 examples include divalent hydrocarbon groups such as linear alkylene groups such as methylene, ethylene, propylene, butylene, hexamethylene, octamethylene, and decylene, branched alkylene groups such as methylethylene and methylpropylene, cyclic alkylene groups such as cyclohexylene, alkenylene groups such as propenylene, arylene groups such as phenylene, and aralkylene groups such as methylenephenylene and methylenephenylenemethylene.
- the divalent hydrocarbon group may have an ester bond, a urethane bond, an ether bond, and an isocyanate bond between the carbon atoms.
- the divalent hydrocarbon group having these bonds may contain multiple types.
- some or all of the hydrogen atoms of these divalent hydrocarbon groups may be substituted with epoxy groups or hydroxyl groups.
- a propylene group is preferable as R3 .
- n is an integer of 0 to 8, preferably 0 to 6, and more preferably 0 to 4.
- Specific examples of such an alkenyl group include a vinyl group, an allyl group, a butenyl group, a propenyl group, a 5-hexenyl group, an octenyl group, and a decenyl group, and of these, a vinyl group is preferred.
- ⁇ , ⁇ , ⁇ , and ⁇ are each independently 0 or a positive number, ⁇ and ⁇ are positive numbers, 2 ⁇ + ⁇ + ⁇ 4,000, and preferably 2 ⁇ + ⁇ + ⁇ 1,000.
- ⁇ is preferably 0 or 1 to 100, more preferably 1 to 80, and even more preferably 1 to 60
- ⁇ is preferably 1 to 100, more preferably 1 to 80, and even more preferably 1 to 60
- ⁇ + ⁇ is preferably 2 to 200, more preferably 2 to 100, and even more preferably 2 to 50.
- ⁇ is preferably 0 or 1 to 3,000, more preferably 1 to 2,000, and even more preferably 1 to 1,500.
- ⁇ is preferably 0 or 1 to 100, more preferably 0 or 1 to 40, and even more preferably 0 or 1 to 20.
- ⁇ is 5 to 27,000, preferably 10 to 20,000, more preferably 40 to 20,000, even more preferably 100 to 20,000, even more preferably 500 to 15,000, and even more preferably 1,000 to 15,000. If ⁇ is less than 10, the kinetic viscosity of the organopolysiloxane composition is too low, and the coated surface may become rough. On the other hand, if ⁇ exceeds 27,000, the kinetic viscosity of the organopolysiloxane composition becomes too high, and the coatability decreases, resulting in poor smoothness and a large difference in the amount of coating depending on the location.
- ⁇ is a positive number from 0 to 200, preferably a positive number from 0 to 20, and more preferably a positive number from 0 to 10.
- ⁇ is a positive number from 0 to 1,000, preferably a positive number from 0 to 10, and more preferably a positive number from 0 to 5.
- the alkenyl group content of component (A) is 0.001 to 0.7 mol/100g, preferably 0.002 to 0.5 mol/100g, more preferably 0.003 to 0.1 mol/100g, and even more preferably 0.005 to 0.07 mol/100g. If the alkenyl group content is less than 0.001 mol/100g, there may be too few reaction points, resulting in poor curing, whereas if the alkenyl group content exceeds 0.7 mol/100g, the crosslink density may be too high, resulting in too high low-speed peel strength or difficulty in peeling.
- the number average molecular weight of component (A) is preferably 800 or more and 2 million or less, and more preferably 3,000 or more and 1 million or less.
- a composition is prepared using a dilution solvent for component (E)
- more preferable results can be obtained by increasing the number average molecular weight of component (A) to 10,000 or more. If the number average molecular weight of component (A) is lower than 800, the amount of coating on the substrate may be insufficient. If it exceeds 2 million, workability may decrease.
- the number average molecular weight can be measured by the number average molecular weight converted into polystyrene by gel permeation chromatography (GPC) analysis (solvent: toluene) (the same applies below).
- the number average molecular weight by GPC analysis is a value measured under the following measurement conditions.
- Apparatus Tosoh Corporation High-speed GPC system HLC-8320 Analytical column: TSKgel SuperHZ manufactured by Tosoh Corporation Developing solvent: toluene Flow rate: 0.35 mL/min Column temperature: 40°C Sample input volume: 2,500 ⁇ L Detector: RI
- Molecular weight calculation Polystyrene-equivalent molecular weight calculated using a calibration curve created from the analysis values of polystyrene molecular weight standard samples
- the viscosity of component (A) at 25°C measured with a rotational viscometer is preferably 7 mPa ⁇ s or more and 70,000 mPa ⁇ s or less (viscosity of a solution in which 30% by weight of organopolysiloxane is dissolved in toluene), more preferably 10 mPa ⁇ s or more and 60,000 mPa ⁇ s or less in 30% by weight toluene, even more preferably 30 mPa ⁇ s or more and 50,000 mPa ⁇ s or less in 30% by weight toluene, and even more preferably 50 mPa ⁇ s or more and 40,000 mPa ⁇ s or less in 30% by weight toluene.
- a composition is prepared using a dilution solvent for component (E)
- more preferable results can be obtained by increasing the viscosity of component (A) at 25°C measured with a rotational viscometer to 30,000 mPa ⁇ s or more, or to 100 mPa ⁇ s or more in 30% by weight toluene. If the viscosity is less than 7 mPa ⁇ s, the amount of coating may be insufficient. If the 30% by mass toluene solution viscosity exceeds 70,000 mPa ⁇ s, workability may decrease.
- the viscosity of component (A) is a value measured using a BM type viscometer (for example, manufactured by Tokyo Keiki Co., Ltd.).
- the rotor, rotation speed, and rotation time are appropriately selected according to the viscosity based on conventional methods.
- the viscosity of a solution in which 30% by mass of organopolysiloxane is dissolved in toluene is measured by adding 150 g of organopolysiloxane to 350 g of toluene, mixing and stirring until the organopolysiloxane is dissolved, and then measuring the viscosity using the method described above.
- component (A) examples include siloxanes containing alkenyl groups at both ends, siloxanes containing alkenyl groups at the side chain, siloxanes containing alkenyl groups at one end and at the side chain, siloxanes containing alkenyl groups at both ends and at the side chain, branched siloxanes containing alkenyl groups at the end, and branched siloxanes containing alkenyl groups at the end and in the side chain.
- the organopolysiloxane may be one represented by the following structural formula: M Vi 2 D ⁇ , MM Vi D ⁇ , M 2 D ⁇ D Vi ⁇ , MM Vi D ⁇ D Vi ⁇ , M Vi 3 D ⁇ T 1 , MM Vi 2 D ⁇ T 1 , M Vi 4 D ⁇ T 2 , M Vi 2 D ⁇ D Vi ⁇ , M Vi 2 D ⁇ Q 1 , MM Vi D ⁇ Q 1 , M ⁇ D ⁇ D Vi ⁇ T Vi ⁇ , M ⁇ M Vi ⁇ D ⁇ D Vi ⁇ T Vi ⁇ (M, Mvi , D, Dvi , T, Tvi , Q, ⁇ , ⁇ , and ⁇ are the same as in the above formula (2). The same applies below.)
- Component (B) is an organohydrogenpolysiloxane having an average of two or more silicon-bonded hydrogen atoms (Si—H groups) per molecule and not having three or more (meth)acrylic groups per molecule (i.e., not including component (C) described below), and may be used alone or in appropriate combination of two or more.
- An organopolysiloxane crosslinked product is formed by addition reaction of the Si—H groups of this organohydrogenpolysiloxane with the alkenyl groups of component (A).
- the organohydrogenpolysiloxane of component (B) preferably has 3 to 100 silicon-bonded hydrogen atoms (Si-H groups) per molecule, and more preferably has 10 to 80 silicon-bonded hydrogen atoms (Si-H groups).
- the Si-H group content is preferably 0.001 to 3.5 mol/100g, more preferably 0.01 to 2.5 mol/100g, even more preferably 0.02 to 2.0 mol/100g, and even more preferably 0.1 to 1.7 mol/100g. If the Si-H group content is too low, the curing properties and adhesion may deteriorate, and if it is too high, the peeling force may become heavy.
- the organohydrogenpolysiloxane of component (B) preferably has a structure represented by the following formula (4).
- M is R'3SiO1 /2
- M H is R'2HSiO1 /2
- D is R'2SiO2 /2
- D H is R'HSiO2 /2
- T is R'SiO3 /2
- T H is HSiO3 /2
- Q is SiO4 /2
- R' is each independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 12 carbon atoms and no aliphatic unsaturated bonds
- ⁇ , ⁇ , ⁇ , and ⁇ are each independently 0 or a positive number
- ⁇ is 0 or a positive number from 1 to 40
- ⁇ is a positive number from 0 to 100
- ⁇ is a positive number from 0 to 10
- ⁇ is a positive number from 0 to 10
- ⁇ , ⁇ , and ⁇ are not simultaneously 0, and 2 ⁇ + ⁇ + ⁇ 100.
- R' can be exemplified as R in the above formula (2), and among these, a monovalent hydrocarbon group having 1 to 8 carbon atoms is preferred.
- the monovalent hydrocarbon groups include alkyl groups such as methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl, decyl, and dodecyl; cycloalkyl groups such as cyclohexyl; aryl groups such as phenyl, naphthyl, and tolyl; aralkyl groups such as benzyl and phenethyl; and groups in which some of the hydrogen atoms bonded to the carbon atoms of these groups have been replaced with halogen atoms, epoxy groups, or polyether groups.
- alkyl groups such as methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl, decyl, and dodecyl
- cycloalkyl groups such as cyclohexyl
- aryl groups such as phenyl, naphthyl, and toly
- phenyl groups are preferably used as the aryl group.
- ⁇ , ⁇ , ⁇ , and ⁇ are each independently 0 or a positive number, and ⁇ is preferably 0 or 1 to 10, more preferably 0 or 1 to 8, and even more preferably 0 or 1 to 5.
- ⁇ is preferably 0 or 1 to 10, more preferably 0 or 1 to 8, and even more preferably 0 or 1 to 5, and
- ⁇ + ⁇ is preferably 2 to 12, and even more preferably 2 to 10.
- ⁇ is preferably 0 or 1 to 100, more preferably 0 or 1 to 8, and even more preferably 0 or 1 to 5, and ⁇ is preferably 0 or 1 to 10, more preferably 1 to 8, and even more preferably 1 to 5.
- ⁇ is a positive number from 0 to 100, preferably 2 to 100, and more preferably 10 to 80.
- ⁇ is a positive number from 0 to 10, preferably 0 to 5, and ⁇ is a positive number from 0 to 10, preferably 0 to 5.
- ⁇ , ⁇ , and ⁇ cannot be 0 at the same time, and ⁇ + ⁇ + ⁇ is between 3 and 100, and preferably between 10 and 80.
- organohydrogenpolysiloxane of component (B) include siloxanes containing hydrogensilyl groups at both ends, siloxanes containing hydrogensilyl groups in the side chain, siloxanes containing hydrogensilyl groups at one end and in the side chain, siloxanes containing hydrogensilyl groups at both ends and in the side chain, siloxanes containing branched hydrogensilyl end groups, and siloxanes containing branched end and side chain hydrogensilyl groups.
- the organohydrogenpolysiloxane may be one represented by the following structural formula: M H 2 D ⁇ , M 2 D H ⁇ , M 2 D ⁇ D H ⁇ , M H 2 D ⁇ D H ⁇ , M H 3 D ⁇ T 1 , M H 4 D ⁇ T 2 , M ⁇ D ⁇ D H ⁇ T H ⁇ M ⁇ D ⁇ D H ⁇ T H ⁇ Q ⁇ (M, M H , D, D H , T, T H , Q, ⁇ , ⁇ , ⁇ , ⁇ , and ⁇ are the same as in equation (4) above.
- M H 2 D 10 M H 2 D 100 , M 2 D H 80 , M 2 D 27 DH 3 , M 2 D 97 DH 3 , M 2 D 26 DH 4 , M 2 D 25 DH 5 , M 2 D 24 DH 6 , M 2 D 96 DH 4 , M 2 D 95 D H 5 , M H 3 D 100 T 1 , M H 4 D 100 T 2 , M H 2 D 97 D H 1, M H 2 D 95 D H 3 , M 3 D 93 D H 3 T H 1, M 5 D 10 D H 40 T 1 Q 1 , M 5 D 10 DH 40 T H 1 Q 1 , M 5 D 10 DH 40 T 1 Q 1 , M 2 DH 30, M 2 DH 60
- the number average molecular weight of component (B) is preferably 194 to 10,000, and more preferably 874 to 5,000. If the number average molecular weight of component (B) is too small, adhesion may be significantly reduced, while if it is too large, reactivity may be poor and curing properties may decrease, resulting in a decrease in residual adhesion rate and an increase in peel strength due to insufficient curing.
- the kinetic viscosity of component (B) at 25°C measured with an Ostwald viscometer is preferably 2 to 500 mm2 /s, more preferably 2 to 300 mm2 /s, and even more preferably 5 to 200 mm2 /s. If the kinetic viscosity at 25°C is less than 2 mm2 /s, the molecular weight is small and the reactivity is good, but the adhesion to the substrate may deteriorate. If it exceeds 500 mm2 /s, the reactivity is deteriorated and the curing property is reduced, and a decrease in the residual adhesion rate and an increase in the peel force due to insufficient curing may be observed.
- the amount of component (B) to be blended is an amount corresponding to 1.0 to 10.0 times the number of moles of Si-H groups in component (B) relative to the number of moles of alkenyl groups in component (A), preferably 1.2 to 6.0 times, more preferably 1.5 to 6.0, and even more preferably 2.0 to 6.0. If the amount of component (B) is too small, the curing properties and adhesion will be insufficient, and if the amount of component (B) is too large, the amount of remaining Si-H groups will increase, resulting in a high peel force, and the number of Si-H groups will decrease over time, resulting in fluctuations in peel force over time.
- the component (C) of the present invention is (C-1) a compound having one or more (meth)acrylic groups in one molecule, which is not an organopolysiloxane, and has a molecular weight of 72 to 1,000, and/or (C-2) an organopolysiloxane having three or more (meth)acrylic groups in one molecule, and which has a weight average molecular weight of 500 to 20,000 in terms of polystyrene as determined by gel permeation chromatography (GPC) analysis (solvent: toluene).
- the component (C) may be used alone or in combination of two or more.
- the upper limit of the weight average molecular weight of the component (C-2) is preferably 10,000 or less, more preferably 5,000 or less.
- the molecular weight of the component (C) can be measured by 29 Si-NMR if it is a siloxane.
- Si-NMR for example, Win Lambda manufactured by JEOL Ltd. can be used as an apparatus.
- the measurement method is as follows: 1.5 g of the sample and 3.5 g of d-chloroform are placed in a Teflon (registered trademark) sample tube having a diameter of 10 mm, and after thorough stirring, the tube is set in the Si-NMR and measured with an accumulation number of 600 times.
- the compound (C-1) other than the organopolysiloxane is a compound having one (meth)acrylic group represented by the following formula (5).
- CH 2 CR 4 COOR 5 (5)
- R4 is a hydrogen atom or a methyl group
- R5 is a hydrogen atom, or an alkyl group, aryl group, or aralkyl group having 1 to 20 carbon atoms, which may have a branched or cyclic structure and may contain an epoxy group, a urethane bond, an ether bond, an isocyanate bond, or a hydroxyl group.
- R5 examples include a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, a cyclohexyl group, a phenyl group, a dicyclopentanyl group, a dicyclopentenyl group, a furfuryl group, a tetrahydrofuryl group, a tetrahydropyranyl group, -CH2CH2 - OH, -CH2CH ( CH3 )-OH, -CH2CH2 - NCO, etc.
- R5 having an epoxy group include the following.
- the compound having a (meth)acrylic group and an epoxy group may be an oligomer.
- Specific examples of compounds having one (meth)acrylic group and a molecular weight of 72 to 1,000 include 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, acrylic acid, butyl acrylate, methyl acrylate, and ethyl acrylate.
- Specific examples of compounds having a (meth)acrylic group and an epoxy group include 4-hydroxybutyl acrylate glycidyl ether.
- copolymers having two (meth)acrylic groups and a molecular weight of 200 to 1,000 include tetraethylene glycol diacrylate, nonaethylene glycol diacrylate, tetradecanyl ethylene glycol diacrylate, tricyclodecane dimethanol diacrylate, 1,10-decanediol diacrylate, 1,6-hexanediol diacrylate, 1,9-nonanediol diacrylate, dipropylene glycol diacrylate, heptapropylene glycol diacrylate, and trimethylolpropane triacrylate.
- component (C-2) organopolysiloxane is used as component (C), it is preferable that it does not have an aliphatic unsaturated bond other than the (meth)acrylic group.
- the (meth)acrylic group means an acrylic group or a methacrylic group. Of these, those having an acrylic group are preferable. It is more preferable that at least one of the (meth)acrylic groups exists as a substituent on a difunctional siloxane unit and/or a trifunctional siloxane unit.
- Organopolysiloxanes include cyclic siloxanes and organopolysiloxanes with linear and branched structures.
- the organopolysiloxane (C-2) preferably has three or more siloxane units having (meth)acrylic groups, and more preferably has three to six. Furthermore, it is preferable that the organopolysiloxane does not have Si-H groups or alkenyl groups.
- the cyclic siloxane is preferably one represented by the following structural formula (6).
- D 1A d' (6) (In the formula, D 1A is R 6 ASiO 2/2 , each R 6 is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 18 carbon atoms, or an alkoxy group, a hydrogen atom, a hydroxyl group, an epoxy group, or a polyoxyalkylene group, A is CH 2 ⁇ CR 1 COR 2 —, R 1 is a hydrogen atom or a methyl group, R 1 is OR 3 or R 3 , and R 3 is a divalent group having 1 to 20 carbon atoms which may have a branched or cyclic structure and which may contain an epoxy group, an ester bond, a urethane bond, an ether bond, an isocyanate bond, or a hydroxyl group, and d' is 3 to 6.)
- an organopolysiloxane having three or more (meth)acrylic groups on the side chain represented by the following formula (7)
- M 1A is R 6 3 SiO 1/2
- M 1A is R 6 2 ASiO 1/2
- D 1 is R 6 2 SiO 2/2
- D 1A is R 6 ASiO 2/2
- T 1 is R 6 SiO 3/2
- T 1A is ASiO 3/2
- Q 1 is SiO 4/2
- each R 6 is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 18 carbon atoms, or an alkoxy group, a hydrogen atom, a hydroxyl group, an epoxy group, or a polyoxyalkylene group.
- A is CH 2 ⁇ CR 1 COR 2 —
- R 1 is a hydrogen atom or a methyl group
- R 2 is OR 3 or R 3
- R 3 is a divalent group having 1 to 20 carbon atoms, which may have a branched or cyclic structure, and may contain an epoxy group, an ester bond, a urethane bond, an ether bond, an isocyanate bond, or a hydroxyl group.
- a is an integer from 0 to 20
- b is an integer from 0 to 5, when a is 0, b is an integer from 2 to 5, when a is 1, b is an integer from 1 to 5, and when a is 2 to 20, b is an integer from 0 to 5.
- c is an integer from 0 to 300
- d is an integer from 0 to 200
- e and f are both integers from 0 to 10
- g is 0 to 5
- b+d+f is 3 or more.
- R 6 is each independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 18 carbon atoms, or an alkoxy group, a hydrogen atom, a hydroxyl group, an epoxy group, or a polyoxyalkylene group, preferably having 1 to 12 carbon atoms, and more preferably having 1 to 8 carbon atoms.
- the monovalent hydrocarbon group examples include alkyl groups such as methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl, decyl, and dodecyl groups; alkenyl groups such as vinyl, allyl, butenyl, propenyl, 5-hexenyl, octenyl, and decenyl groups; cycloalkyl groups such as cyclohexyl groups; aryl groups such as phenyl, naphthyl, and tolyl groups; aralkyl groups such as benzyl and phenethyl groups; and groups in which a portion of the hydrogen atoms bonded to the carbon atoms of these groups have been substituted with halogen atoms, epoxy groups, amino groups, polyether groups, cyano groups, hydroxyl groups, or the like.
- alkyl groups such as methyl, ethyl, propyl, butyl,
- alkoxy group examples include a methoxy group, an ethoxy group, a propoxy group, a butoxy group, etc.
- polyoxyalkylene group examples include a polyoxyethylene group, a polyoxypropylene group, etc.
- R1 is a hydrogen atom or a methyl group, and preferably a hydrogen atom.
- R2 is OR3 or R3 , and R3 is a divalent group having 1 to 20 carbon atoms, which may have a branched or cyclic structure, and may contain an epoxy group, an ester bond, a urethane bond, an ether bond, an isocyanate bond, or a hydroxyl group.
- R3 examples include linear alkylene groups such as methylene, ethylene, propylene, butylene, hexamethylene, octamethylene, and decylene, branched alkylene groups such as methylethylene and methylpropylene, cyclic alkylene groups such as cyclohexylene, alkenylene groups such as propenylene, arylene groups such as phenylene, and aralkylene groups such as methylenephenylene and methylenephenylenemethylene.
- divalent hydrocarbon groups may also be mediated by ester bonds, urethane bonds, ether bonds, and isocyanate bonds, and these may also be used in combination.
- some or all of the hydrogen atoms of these divalent hydrocarbon groups may be substituted with epoxy groups or hydroxyl groups.
- propylene is preferred as R3 .
- a is an integer from 0 to 20
- b is an integer from 0 to 5, when a is 0, b is an integer from 2 to 5, when a is 1, b is an integer from 1 to 5, when a is 2 to 20, b is an integer from 0 to 5.
- a is preferably 2 or 3, in which case b is preferably 0.
- c is an integer from 0 to 300, preferably an integer from 5 to 200, more preferably an integer from 10 to 100, and even more preferably an integer from 15 to 70.
- d is an integer between 0 and 200, preferably between 3 and 50, more preferably between 3 and 30, and even more preferably between 3 and 20. It is possible to carry out the process with d less than 3, but the curing property may decrease depending on other conditions, such as a small amount of catalyst. Also, if d exceeds 200, the curing property may decrease.
- e and f are both integers from 0 to 10, preferably integers from 0 to 6, and more preferably integers from 0 to 3. If e is 10 or more, the curing property may decrease, although the reason is unclear. Similarly, if f is 10 or more, the curing property may decrease.
- g is 0 to 5, and preferably 0 or 1. If g exceeds 5, it is not preferable because it becomes difficult to control the viscosity during production and the peeling force becomes large.
- (C-2) organopolysiloxane compounds having 3 or more (meth)acrylic groups and a molecular weight of 500 or more include the following: D 1A 3 , D 1A 4 , D 1A 5 , M 1 2 D 1A 3 D 1 2 , M 1 3 D 1A 3 T 1 1 , M 1 3 D 1A 2 T 1A , M 1 2 D 1 5 D 1A 3 , M 1 2 D 1 20 D 1A 5 , M 1Vi 2 D 1 20 D 1A 5 , M 1 2 D 1 30 D 1A 7 , M 1 ⁇ 2 D 1 30 D 1A 7, M 1 2 D 1 25 D 1 ⁇ 5 D 1A 7, M 1 2 D 1 65 D 1A 15 , M 1Vi 2 D 1 65 D 1A 15, M 1 2 D 1 61 D 1OH 4 D 1A 15 , M 1 2 D 1 63 D 1OSiR' 2 D 1A 15, M 1H 2 D 1 65 D 1A 15, M 1 1 M 1A 1 D 1 10 D 1A
- the amount of component (C) to be blended is 0.01 to 5.0 parts by mass, preferably 0.1 to 2.0 parts by mass, per 100 parts by mass of component (A). If it is less than 0.01 part by mass, the cure acceleration effect is not clear, while if it exceeds 5.0 parts by mass, the amount of migrating components increases, which may result in a decrease in the residual adhesion rate and deterioration of adhesion.
- the method for producing component (C) is to mix raw materials such as M12, M12D13 , M1A2 , D1A4 , and D14 ( M1 , M1A , D1 , and D1A are the same as those in formula (6) above), equilibrate the mixture with an acid or alkali catalyst, and dry under reduced pressure.
- a phenol-based antioxidant such as dibutylhydroxytoluene, or a hindered amine-based antioxidant such as tetramethylpiperidine or an aromatic secondary amine.
- a strong acid such as sulfuric acid, fluorosulfonic acid, or trifluoromethanesulfonic acid as the catalyst.
- platinum group metal catalyst (D) of the present invention known catalysts that are used as addition reaction catalysts can be used.As such platinum group metal catalysts, for example, platinum, palladium, rhodium, ruthenium catalysts can be mentioned, among which platinum catalysts are particularly preferably used.As such platinum catalysts, for example, platinum compounds, complexes of platinum and vinylsiloxane, alcohol solutions or aldehyde solutions of chloroplatinic acid, complex salts of chloroplatinic acid and various olefins, complexes of chloroplatinic acid and vinylsiloxane, etc. can be mentioned.
- the amount of component (D) is a catalytic amount.
- the platinum group metal concentration added to produce a cured film is 100 to 500 ppm by mass in the organopolysiloxane composition for release paper or film.
- the amount of platinum group metal catalyst in the present invention is 1 to 100 ppm by mass of platinum group metal relative to the total mass of the organopolysiloxane composition (total mass of components (A) to (D)), preferably 1 to 60 ppm, more preferably 1 to 40 ppm, and most preferably 1 to 30 ppm.
- component (E) The dilution solvent of component (E) is an optional component, and is not used when the composition of the present invention is used as a solventless type, but when component (A) is a high-viscosity organopolysiloxane, the dilution solvent reduces the viscosity of the composition, making it easier to apply a thin film onto a substrate.
- the organopolysiloxane composition acts as a compatibilizer and solvent to prevent the separation of the multiple different components that make up the organopolysiloxane composition, providing a coating solution with a uniform composition, and imparts good leveling and wettability to the organopolysiloxane composition layer applied onto various substrates, making it possible to form a silicone cured coating of uniform thickness and with a smooth surface and high smoothness.
- dilution solvents examples include organic solvents (not including siloxane solvents) that are soluble in organopolysiloxanes, such as aromatic solvents such as toluene and xylene, aliphatic solvents such as hexane and heptane, ketone solvents such as acetone and methyl ethyl ketone (also known as 2-butanone), ester solvents such as ethyl acetate, and ether solvents such as diethyl ether, as well as organopolysiloxanes (siloxane solvents) such as low-viscosity cyclic siloxanes such as octamethyltetrasiloxane and decamethylpentasiloxane, linear siloxanes such as M 2 D p (M and D are the same as in the above formula (2), p is a number from 0 to 200, preferably 1 to 50), and branched siloxanes such as M 2 D
- a dilution solvent When a dilution solvent is used, it is 1 to 100,000 parts by mass per 100 parts by mass of the organopolysiloxane of component (A). If it is less than 1 part by mass, the viscosity will be too high, and if it exceeds 100,0000 parts by mass, the viscosity will be too low and the coatability will decrease. It is more preferable to use 1,000 to 10,000 parts by mass.
- the addition reaction inhibitor (F) of the present invention is a component that is added as necessary and controls the catalytic activity of the platinum group metal catalyst.
- examples of such inhibitors include various organic nitrogen compounds, organic phosphorus compounds, acetylene compounds, oxime compounds, and organic chloro compounds.
- the compound include acetylene alcohols such as 1-ethynyl-1-cyclohexanol, 3-methyl-1-butyn-3-ol, 3,5-dimethyl-1-hexyn-3-ol, 3-methyl-1-penten-3-ol, and phenylbutynol; acetylene compounds such as 3-methyl-3-1-penten-1-yne and 3,5-dimethyl-1-hexyn-3-yne; reaction products of acetylene compounds such as 1,1-dimethylpropynyloxytrimethylsilane with alkoxysilanes or siloxanes or hydrogensilanes; vinyl siloxanes such as tetramethylvinylsiloxane cyclic compounds; organic nitrogen compounds such as benzotriazole and other organic phosphorus compounds; oxime compounds; maleic acid compounds such as diallyl maleate; and organic chloro compounds.
- acetylene alcohols such as 1-ethynyl-1-cyclohe
- component (F) When component (F) is added, the amount is preferably 0.01 to 5 parts by mass, and more preferably 0.1 to 3 parts by mass, per 100 parts by mass of component (A).
- Component (G) As the component (G), a component that improves adhesion to the substrate can be blended.
- Component (G) is an organopolysiloxane having at least two alkenyl groups, comprising R10 (3-g1) R9g1SiO1 / 2siloxane units ( M10R10 units) or R10SiO3 / 2siloxane units ( T10 units) (wherein each R9 is independently an alkenyl group, each R10 is independently an aliphatic unsaturated bond-free unsubstituted or halogen atom or cyano group-substituted monovalent hydrocarbon group, and g1 is an integer from 1 to 3), in which the molar ratio of M10R10 units/ T10 units is 2/8 to 8/2, the viscosity at 25°C is in the range of 1 to 1,000 mPa ⁇ s, and the molecular terminals are M10R10 units or M10R10 units and partially silanol groups
- R 9 can be exemplified by the same alkenyl group as P in the above formula (2), among which vinyl group is industrially preferred.
- R 10 include alkyl groups such as methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, octyl group, decyl group, and dodecyl group; cycloalkyl groups such as cyclohexyl group; aryl groups such as phenyl group, naphthyl group, and tolyl group; and aralkyl groups such as benzyl group and phenethyl group, and other monovalent hydrocarbon groups that do not contain an aliphatic unsaturated bond, among which methyl group and phenyl group are industrially preferred.
- g1 is an integer of 1 to 3, preferably 1 or 2.
- Component (G) is an organopolysiloxane in which the molar ratio of the M R9R10 units to the T R10 units is 2/8 to 8/2, and preferably 3/7 to 7/3. If the molar ratio is less than 2/8, the effect of improving adhesion may be small, while if it exceeds 8/2, industrial production becomes difficult.
- difunctional R10 (2-g2) R9g2SiO2 /2 siloxane units (wherein g2 is 0, 1 or 2; referred to as D R9R10 units) and tetrafunctional SiO4 /2 siloxane units (Q units) may be contained within the range that does not impair the effects of component (G), but when stronger adhesion is required, particularly in release films, siloxanes that do not contain these and have a molar ratio of M R9R10 units/T R10 units of 2/8 to 8/2 are preferred. Note that when D R9R10 units or Q units are contained, they are always used in small amounts relative to both the M R9R10 units and the T R10 units.
- Component (G) differs from component (A) in that the number of T R10 units is greater than the number of D R9R10 units.
- the amount of alkenyl groups in the organopolysiloxane of component (G) is preferably 0.01 to 2.5 mol/100g, more preferably 0.03 to 2.0 mol/100g, and even more preferably 0.05 to 1.5 mol/100g. If this content is too low, the effect of improving adhesion may be reduced, and if it is too high, the pot life may be shortened.
- the organopolysiloxane of component (G) preferably has a viscosity at 25°C of 1 to 1,000 mPa ⁇ s, particularly 5 to 500 mPa ⁇ s, more preferably 10 to 100 mPa ⁇ s, and even more preferably 10 to 50 mPa ⁇ s, and preferably has a degree of polymerization within this viscosity range. If the viscosity is less than 1 mPa ⁇ s, the effect of improving adhesion may be small, and if it exceeds 1,000 mPa ⁇ s, solubility or dispersibility in the composition may decrease.
- component (G) examples include the following: (In the formula, Me represents a methyl group, Vi represents a vinyl group, and Ph represents a phenyl group.)
- the amount is preferably 0.1 to 20 parts by weight, and more preferably 0.15 to 10 parts by weight, per 100 parts by weight of component (A). If the amount is less than 0.1 part by weight, the effect of improving adhesion to the substrate may be reduced, and if the amount is more than 20 parts by weight, the release properties of the cured coating may decrease.
- component (G) When compounding with component (G), it is desirable to compound an amount of component (C) such that the ratio of the number of moles of SiH groups in component (C) to the number of moles of alkenyl groups in component (G) (SiH groups/alkenyl groups) is 1 or more, and especially 1 to 5, in order to prevent a decrease in the release properties of the cured coating.
- the organopolysiloxane composition of the present invention may contain components that are usually added to organopolysiloxane compositions for release papers or films, provided that the effects of the present invention are not impaired.
- Optionally added components include, for example, high molecular weight linear organopolysiloxanes other than components (A) to (C) for the purpose of providing slipperiness, silicone resins having aryl groups other than components (A) to (C) for the purpose of adjusting the release force, silicone resins, silica, and low molecular weight organopolysiloxanes that have neither hydrogen atoms bonded to silicon atoms nor alkenyl groups.
- the organopolysiloxane composition of the present invention can be obtained by mixing the above-mentioned components (A) through (D) and, if necessary, the components (E) through (G) and any optional components in the respective prescribed amounts.
- the viscosity of the resulting organopolysiloxane composition at 25°C, measured using an Ostwald viscometer, is preferably 1 to 100 mPa ⁇ s, and more preferably 5 to 50 mPa ⁇ s.
- the organopolysiloxane composition of the present invention is applied to a sheet-like substrate such as paper or plastic film using a coating roll (three-roll, five-roll, gravure roll, offset gravure roll, etc.), and then cured by heating in a conventional manner.
- a silicone cured coating of the organopolysiloxane composition of the present invention is formed on one side of the sheet-like substrate, and this is suitable for use as a release sheet, etc.
- paper substrates include glassine paper, polyethylene laminated paper, polyvinyl alcohol resin coated paper, clay coated paper, etc.
- plastic film substrates include films of polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate, etc.
- the amount of organopolysiloxane composition applied should be sufficient to form a cured silicone coating on the surface of the sheet-like substrate, and is, for example, about 0.1 to 50.0 g/m 2. Applying too much may result in a decrease in release performance.
- the heat curing conditions vary depending on the type of substrate and the amount of coating, but a cured film can be formed on the substrate by heating at 80 to 200°C, preferably 100 to 180°C, for 1 to 60 seconds, preferably 2 to 30 seconds.
- the peeling force for tesa 7475 tape (tesa UK Ltd.) is preferably 0.4 N or less, more preferably 0.10 to 0.40 N.
- the peeling force for the BPS-5127 transfer method is preferably 0.1 N or less, more preferably 0.04 to 0.1 N.
- the residual adhesion rate is preferably 91% or more, and more preferably 94% or more.
- the present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.
- the average molecular weights listed below were determined by 29Si -NMR, the viscosities were measured at 25°C using a rotational viscometer, and the kinetic viscosities were all measured at 25°C using an Ostwald viscometer.
- Component (A) Methylvinylpolysiloxane (A1) Polysiloxane having the following structure, a vinyl value of 0.0073 mol/100 g, and a viscosity of 20,000 mPa ⁇ s at 25° C.
- Methylvinylpolysiloxane (A2) No siloxane unit represented by formula (1) Polysiloxane having the following structure, a vinyl value of 0.0067 mol/100 g, and a viscosity of a 30% by mass toluene solution at 25° C.
- Methylphenylvinylpolysiloxane having the following structure, a vinyl value of 0.018 mol/100 g, a phenyl group content of 10 mol %, and a viscosity of a 30% by weight toluene solution at 25° C.
- Methylhydrogenpolysiloxane (B1) Methylhydrogenpolysiloxane ⁇ (CH 3 ) 3 SiO 1/2 ⁇ 2 ⁇ (CH 3 ) HSiO 2/2 ⁇ 90 ⁇ (CH 3 ) 2 SiO 2/2 ⁇ 10 , which is capped at both molecular chain ends with trimethylsiloxy groups, is composed of (CH 3 ) HSiO 2/2 units and (CH 3 ) 2 SiO 2/2 units, has a Si—H group content of 1.42 mol/100 g , and has a kinetic viscosity of 110 mm 2 /s.
- Methylhydrogenpolysiloxane ⁇ (CH 3 ) 3 SiO 1/2 ⁇ 2 ⁇ (CH 3 )HSiO 2/2 ⁇ 60 in which both ends of the molecular chain are blocked with trimethylsiloxy groups and all units other than the two ends are (CH 3 ) HSiO units , has a Si —H group content of 1.59 mol/100 g , and a kinetic viscosity of 35 mm 2 /s.
- Methylphenylhydrogenpolysiloxane ⁇ (CH 3 ) 3 SiO 1/2 ⁇ 2 ⁇ (CH 3 ) HSiO 2/2 ⁇ 73 ⁇ (C 6 H 5 ) 2 SiO 2/2 ⁇ 8 , having a Si-H group content of 1.19 mol/100 g, a phenyl group content of 10 mol %, and a kinetic viscosity of 100 mm 2 /s, in which both molecular chain terminals are blocked with trimethylsiloxy groups and the rest are composed entirely of (CH 3 ) HSiO units and (C 6 H 5 ) 2 SiO units .
- Methylphenylhydrogenpolysiloxane ⁇ (CH 3 ) 3 SiO 1/2 ⁇ 2 ⁇ (CH 3 ) HSiO 2/2 ⁇ 70 ⁇ (C 6 H 5 ) 2 SiO 2/2 ⁇ 20 having a Si—H group content of 0.84 mol/100 g, a phenyl group content of 22 mol %, and a kinetic viscosity of 120 mm 2 /s, the molecular chain of which is terminated at both ends with trimethylsiloxy groups and entirely composed of (CH 3 ) HSiO units and (C 6 H 5 ) 2 SiO units except for the ends .
- (F) Component 3-methyl-1-butyn-3-ol (F1) 1-Ethynyl-1-cyclohexanol (F2)
- Example 1 An organopolysiloxane composition having a viscosity of 10 mm2/s and an H/Vi ratio (the ratio of Si-H groups in component (B) to alkenyl groups in component (A) (the same applies hereinafter) ) of 3 was prepared by adding 100 parts by mass of methylvinylpolysiloxane (A1) as component (A), 1.54 parts by mass of methylhydrogenpolysiloxane (B1) as component (B), 1.3 parts by mass of polysiloxane D3A4 (C11) having an acrylic group on the side chain as component (C), 1,200 parts by mass of toluene and 1,200 parts by mass of hexane as component (E), and 3 parts by mass of 3-methyl- 1 -butyn-3-ol (F1) as component (F) and stirring until uniform.
- A1 methylvinylpolysiloxane
- B1 methylhydrogenpolysiloxane
- C11 polysi
- component (D) was a complex of platinum and vinylsiloxane , so that the amount was 30 ppm, calculated as the atomic mass of platinum, relative to the total mass of components (A), (B), (C), (D), and (E), and the mixture was stirred until homogenous.
- [Comparative Example 1] 100 parts by mass of methylvinylpolysiloxane (A1) as component (A), 1.54 parts by mass of methylhydrogenpolysiloxane (B1) as component (B), 1,200 parts by mass of toluene and 1,200 parts by mass of hexane as component (E), and 3 parts by mass of 3-methyl-1-butyn-3-ol (F1) as component (F) were added and stirred until uniform, and then a platinum and vinylsiloxane complex as component (D) was added in an amount of 80 ppm, calculated as platinum atomic mass, relative to the total mass of components (A), (B), (C), and (D), and the mixture was stirred until uniform, to prepare an organopolysiloxane composition with a viscosity of 10 mm2 /s and H/Vi 3.
- A2 methylvinylpolysiloxane
- B1 methylhydrogenpolysiloxane
- the organopolysiloxane composition was applied to a polyester film using a No. 14 bar coater and heated for 20 seconds in a hot air dryer at 120° C. to obtain a release film having a cured coating of the organopolysiloxane composition having a thickness of 0.3 g/ m2 .
- the obtained release film was aged at 25°C for 24 hours, and then tesa-7475 tape (tesa UK Ltd.) was attached to the cured film surface of the release film, and cut to a size of 2.5 cm x 18 cm to prepare a test piece.
- This test piece was sandwiched between glass plates and pressed at 70°C for 20 hours under a load of 20 g/ cm2 , after which one end of the test piece was peeled off, and the adhesive-attached substrate end of the tape was pulled at an angle of 180 degrees to the polyester film at a peeling speed of 0.3 m/min, and the force required to peel at this time (i.e., "peeling force") (N/25 mm) was measured using a tensile tester (Shimadzu Corporation AGS-50G type).
- the tesa-7475 tape (tesa UK Ltd.) was attached to a suspension plate, and a 2 kg tape roller was rolled back and forth once to press the tape. After leaving the tape for 30 minutes, one end of the tesa-7475 tape was peeled off, and the end was pulled in a direction at an angle of 180 degrees to the suspension plate and peeled off at a peel speed of 0.3 m/min. The force required to peel the tape off was measured as adhesive strength A (N/25 mm).
- unused tesa-7475 tape was attached to the suspension plate, and a 2 kg tape roller was rolled back and forth once to bond it, and after leaving it for 30 minutes, one end of the tesa-7475 tape was peeled off, and the end was pulled in a direction at an angle of 180 degrees to the suspension plate and peeled off at a peeling speed of 0.3 m/min.
- the force required to peel was measured as adhesive strength B (N/25 mm).
- the residual adhesion rate (%) was calculated as (A/B) x 100.
- the organopolysiloxane composition was applied to a polyester film using a No. 14 bar coater, and then heated for 20 seconds in a hot air dryer at 120°C to obtain a release film having a cured coating of the organopolysiloxane composition with a thickness of 0.3 g/ m2 .
- the cured coating surface was rubbed strongly with the index finger 10 times, and red oil-based ink was applied to observe the degree of ink absorption and the condition of the cured coating. The results were expressed as "X” if the finger marks were dark, " ⁇ " if they were light, and "O" if they were barely visible.
- a release film prepared in the same manner as in the release force measurement was allowed to stand for 3 days at 25°C and 50% RH, after which the cured film of organopolysiloxane composition formed on the surface of the polyester film was rubbed strongly with the index finger 10 times, and red oil-based ink was applied to observe the degree of ink absorption and the condition of the cured film.
- the results were expressed as follows: no ink staining: good adhesion ( ⁇ ); partial ink staining: partial dropout ( ⁇ ); entire surface staining: complete dropout ( ⁇ ).
- the release film was left for one day under conditions of 60°C and 90% RH to promote a decrease in adhesion under more severe conditions, and then the adhesion was evaluated in the same manner. If there was no staining with the ink, the adhesion was evaluated as being particularly good and was marked with " ⁇ ".
- Example 10 A composition having a kinetic viscosity of 401 mm2/s and an H/Vi (the ratio of Si-H groups in the composition to alkenyl groups in the composition) of 1.8 was prepared by adding 60 parts by mass of methylvinylpolysiloxane (A3) as component (A), 40 parts by mass of methylhydrogenpolysiloxane (B2) as component (B), 4.23 parts by mass of methylhydrogenpolysiloxane (B2) as component (B), 0.5 parts by mass of acrylic acid (C1) as component (C), and 0.3 parts by mass of 1-ethynyl- 1 -cyclohexanol (F2) as component (F) and stirring until uniform.
- A3 methylvinylpolysiloxane
- B2 methylhydrogenpolysiloxane
- B2 methylhydrogenpolysiloxane
- B2 methylhydrogenpolysiloxane
- B2 methylhydrogenpolys
- a composition having a kinetic viscosity of 420 mm2/s and an H/Vi (the ratio of Si-H groups in the composition to alkenyl groups in the composition) of 1.8 was prepared by adding 100 parts by mass of methylvinylpolysiloxane (A4) as component (A), 1.92 parts by mass of methylhydrogenpolysiloxane (B2) as component (B), 0.5 parts by mass of acrylic acid (C1) as component (C), and 0.3 parts by mass of 1-ethynyl- 1 -cyclohexanol (F2) as component (F) and stirring until uniform.
- a platinum/vinylsiloxane complex was then added as component (D) to give a platinum atomic mass of 80 ppm relative to the total mass of components (A), (B), (C), and (D). The mixture was stirred until uniform.
- organopolysiloxane compositions obtained in the above examples were evaluated as follows. The results are shown in Tables 4 to 6 together with the above formulations.
- the organopolysiloxane composition was applied onto the metal roll of an RI tester (manufactured by IHI Machinery Systems Co., Ltd.), and the two rolls in contact with the rubber roll were rotated for 45 seconds to spread the composition evenly onto the rolls, after which the composition was transferred from the rubber roll to a polyethylene-laminated paper.
- the polyethylene-laminated paper to which the composition had been transferred was heated for 20 seconds in a hot air dryer at 120°C to obtain a release paper having a cured coating of the organopolysiloxane composition having a thickness of 0.9 to 1.1 g/ m2 .
- a load was applied to the cut piece by rolling a 2 kg roller back and forth once, and after aging for 24 hours at room temperature, one end of the test piece was peeled off, and the adhesive-attached substrate end of the tape was pulled in a direction at an angle of 180 degrees to the polyethylene laminated paper at a peeling speed of 0.3 m/min, and the force required for peeling (i.e., "peeling force") (N/50 mm) was measured using a tensile tester (Shimadzu Corporation AGS-50G type).
- the silicone composition was transferred to polyethylene laminated paper in the same manner as in the case of the release force, and cured in a dryer to obtain a release paper. After aging at 23°C for 24 hours, Nitto Denko NO31B tape was attached to the release paper. Similarly, Nitto Denko NO31B tape was attached to a Teflon (registered trademark) plate for comparison. Next, these attached samples were pressed at 70°C with a load of 20 g/ cm2 and stored for 20 hours.
- the tape was peeled off, attached to a stainless steel plate, and pressed back and forth with a 2 kg roller once, and the adhesive force was measured using a tensile tester (Shimadzu Corporation AGS-50G type).
- the adhesive strength of the Teflon (registered trademark) plate laminating tape was taken as a blank value, and the ratio (%) of the measured value of the sample to the blank value was taken as the residual adhesive rate (%).
- the silicone composition was transferred to polyethylene-laminated paper and heated for 20 seconds in a hot air dryer at 120°C to obtain a release paper having a cured coating of the organopolysiloxane composition with a thickness of 0.9 to 1.1 g/ m2 .
- the surface of the cured coating was rubbed vigorously with the index finger 10 times, and red oil-based ink was applied to observe how well the ink absorbed and the condition of the cured coating. The results were expressed as "X” if the finger marks were dark, " ⁇ " if they were light, and "O" if they were barely visible.
- a composition having a kinetic viscosity of 420 mm2/ s and an H/Vi (ratio of Si-H groups in the composition to alkenyl groups in the composition) of 1.8 was prepared by adding 100 parts by mass of methylvinylpolysiloxane ( A4 ) as component (A), 1.92 parts by mass of methylhydrogenpolysiloxane (B2) as component (B), 1 part by mass of organosiloxane M32D320D3MA5 (C10) having a methacryl group on the side chain as component (C), and 0.3 parts by mass of 1-ethynyl-1-cyclohexanol (F2) as component (F) and stirring until uniform.
- a platinum and vinylsiloxane complex was then added as component (D) to give a platinum atomic mass of 20 ppm relative to the total mass of components (A), (B), (C), and ( D ). The mixture was stirred until uniform.
- organopolysiloxane compositions obtained in the above examples were evaluated as follows. The results are shown in Table 6 together with the above formulations.
- the composition obtained above was applied onto the metal roll of an RI tester (manufactured by IHI Machine Systems Co., Ltd.), and the two rolls consisting of a metal roll and a rubber roll were rotated for 45 seconds to uniformly spread the composition, and then the composition was transferred from the rubber roll to glassine paper ASP (manufactured by Ahlstrom-Munksjo Co., Ltd.).
- the glassine paper to which the composition was transferred was heated for 20 seconds in a hot air dryer at 120°C to obtain a release paper having a cured film of the composition having a thickness of 0.9 to 1.1 g/ m2 .
- a tesa-7475 tape (tesa UK Ltd.) was attached to the cured film surface of the release paper (the side transferred from the rubber roll) and cut to a size of 2.5 cm x 18 cm.
- peeling force B N/25 mm was measured.
- the residual adhesion rate (%) was calculated by (A/B) x 100.
- the component (A) was 100 parts by mass of methylvinylpolysiloxane (A1)
- the component (B) was 1.04 parts by mass of methylhydrogenpolysiloxane (B1) and 0.60 parts by mass of methylphenylhydrogenpolysiloxane (B3)
- the component ( C ) was polysiloxane M32D320D3A5 having an acrylic group on the side chain .
- Example 17 60 parts by mass of methylvinylpolysiloxane (A1) and 40 parts by mass of methylphenylvinylpolysiloxane (A5) as component (A), 1.46 parts by mass of methylhydrogenpolysiloxane (B1) as component (B), 1.3 parts by mass of polysiloxane M32D320D3A5 (C9) having an acrylic group on the side chain as component (C), 1,200 parts by mass of toluene and 1,200 parts by mass of hexane as component (E), and 3 parts by mass of 3 - methyl- 1 - butyn -3- ol (F1) as component (F) were added and stirred until uniform, and then a platinum/vinylsiloxane complex was added as component (D) so that the amount was 80 ppm, calculated as platinum atomic mass, relative to the total mass of components (A), (B), (C), and (D), and the mixture was stirred until uniform.
- the mixture had
- Example 18 As the component (A), 60 parts by mass of methylvinylpolysiloxane (A1) and 40 parts by mass of methylphenylvinylpolysiloxane (A5) were used, as the component (B), 0.70 parts by mass of methylhydrogenpolysiloxane (B1) and 0.47 parts by mass of methylphenylhydrogenpolysiloxane (B3) were used, and as the component (C) , polysiloxane M32D320D3A5 having an acrylic group on the side chain was used .
- Example 19 100 parts by mass of methylphenylvinylpolysiloxane (A6) as component (A), 4.29 parts by mass of methylphenylhydrogenpolysiloxane (B4) as component (B), 1.3 parts by mass of polysiloxane M32D320D3A5 ( C9 ) having an acrylic group on the side chain as component (C), 1,200 parts by mass of toluene and 1,200 parts by mass of hexane as component (E), 3 parts by mass of 3-methyl-1-butyn-3-ol (F1) as component ( F ) , and 0.60 parts by mass of organopolysiloxane (G1) as component (G) were added and stirred until uniform, after which a platinum and vinylsiloxane complex was added as component (D) so that the amount was 80 ppm, calculated as platinum atomic mass, relative to the total mass of components (A), (B), (C), and (D), and the mixture was stirred until uniform.
- the mixture 100
- organopolysiloxane compositions obtained in the above examples were evaluated using the same methods and conditions as those used in 1-1) Evaluation of Solvent-Based Compositions. These results are shown in Table 7 along with the above blended compositions.
- Example 20 100 parts by mass of methylvinylpolysiloxane (A1) as component (A), 1.54 parts by mass of methylhydrogenpolysiloxane (B1) as component (B), 1 part by mass of polysiloxane M32D320D3A5 ( C9 ) having an acrylic group on the side chain as component (C), 1,561 parts by mass of toluene as component (E), 3 parts by mass of 3-methyl-1-butyn-3-ol (F1) as component ( F ), and 1 part by mass of Perhexa C ( H1) as component (H) were added and stirred until uniform, and then a platinum/vinylsiloxane complex was added as component (D) so that the amount was 80 ppm, calculated as platinum atomic mass, relative to the total mass of components (A), (B), (C), and (D), and the mixture was stirred until uniform.
- the resulting mixture had a
- Example 21 A composition having a kinetic viscosity of 10 mm2/s and an H/Vi (ratio of Si-H groups in the composition to alkenyl groups in the composition) of 3 was prepared by adding 100 parts by mass of methylvinylpolysiloxane (A1) as component (A), 1.54 parts by mass of methylhydrogenpolysiloxane (B1) as component (B), 1 part by mass of polysiloxane M32D320D3A5 (C9 ) having an acrylic group on the side chain as component (C), 1,561 parts by mass of toluene as component (E), and 3 parts by mass of 3 -methyl-1-butyn-3-ol (F1) as component (F) and stirring until uniform.
- A1 methylvinylpolysiloxane
- B1 methylhydrogenpolysiloxane
- C9 polysiloxane M32D320D3A5
- F1 3 -methyl-1-butyn-3-ol
- [Comparative Example 8] 100 parts by mass of methylvinylpolysiloxane (A1) as component (A), 1.54 parts by mass of methylhydrogenpolysiloxane (B1) as component (B), 1,561 parts by mass of toluene as component (E), and 3 parts by mass of 3-methyl-1-butyn-3-ol (F1) as component (F) were added and stirred until uniform, and then a platinum and vinylsiloxane complex as component (D) was added in an amount of 80 ppm, calculated as platinum atomic mass, relative to the total mass of components (A), (B), (C), and (D), and the mixture was stirred until uniform, to prepare an organopolysiloxane composition with a viscosity of 10 mm2 /s and H/Vi 3.
- organopolysiloxane compositions obtained in the above examples were evaluated as follows. The results are shown in Table 8 together with the above formulations.
- the organopolysiloxane composition was applied to a polyethylene laminated paper using a No. 14 bar coater and heated for 30 seconds in a hot air dryer at 100°C to obtain a release paper having a cured coating of the organopolysiloxane composition having a thickness of 0.9 to 1.1 g/ m2 .
- a solvent-based acrylic adhesive BPS-5127 manufactured by Toyo Ink Co., Ltd. was applied to the cured film surface side of the release paper, and then dried for 180 seconds in a dryer at 100°C.
- the paper was left at room temperature for 10 minutes or more, and then a wood-free paper was attached and cut into a size of 5.0 cm x 18 cm.
- a load was applied to the cut piece by rolling a 2 kg roller back and forth once, and after aging for 24 hours at room temperature, one end of the test piece was peeled off, and the adhesive-attached substrate end of the tape was pulled in a direction at an angle of 180 degrees to the polyethylene laminated paper at a peeling speed of 0.3 m/min, and the force required for peeling (i.e., "peeling force") (N/50 mm) was measured using a tensile tester (Shimadzu Corporation AGS-50G type).
- unused tesa-7475 tape was attached to the suspension plate, and a 2 kg tape roller was rolled back and forth once to bond it, and after leaving it for 30 minutes, one end of the tesa-7475 tape was peeled off, and the end was pulled in a direction at an angle of 180 degrees to the suspension plate and peeled off at a peeling speed of 0.3 m/min.
- the force required to peel was measured as adhesive strength B (N/25 mm).
- the residual adhesion rate (%) was calculated as (A/B) x 100.
- the silicone composition was coated on polyethylene-laminated paper and heated for 30 seconds in a hot air dryer at 100°C to obtain a release paper having a cured coating of the organopolysiloxane composition with a thickness of 0.9 to 1.1 g/ m2 .
- the cured coating surface was rubbed vigorously with the index finger 10 times, and red oil-based ink was applied and the degree of ink absorption and the condition of the cured coating were observed. The results were expressed as "X” if the finger marks were dark, " ⁇ " if they were light, and "O" if they were barely visible.
- Example 23 A composition having a kinetic viscosity of 405 mm2/s and an H/Vi (ratio of Si-H groups in the composition to alkenyl groups in the composition) of 1.8 was prepared by adding 60 parts by mass of methylvinylpolysiloxane ( A3 ) and 40 parts by mass of methylvinylpolysiloxane ( A4 ) as component (A), 4.23 parts by mass of methylhydrogenpolysiloxane (B2) as component ( B ), 1 part by mass of polysiloxane M32D320D3A5 (C9) having an acrylic group on the side chain as component (C), and 0.3 parts by mass of 1-ethynyl- 1 -cyclohexanol (F2) as component (F) and stirring until uniform.
- A3 methylvinylpolysiloxane
- A4 methylvinylpolysiloxane
- B2 methylhydrogenpolysiloxane
- C9
- a composition having a kinetic viscosity of 400 mm2/s and an H/Vi (the ratio of Si-H groups in the composition to alkenyl groups in the composition) of 1.8 was prepared by adding 60 parts by mass of methylvinylpolysiloxane (A3) as component (A), 40 parts by mass of methylvinylpolysiloxane (A4) as component (B), 4.23 parts by mass of methylhydrogenpolysiloxane (B2) as component (B), and 0.3 parts by mass of 1-ethynyl-1-cyclohexanol (F2) as component (F) and stirring until uniform.
- a platinum/vinylsiloxane complex was then added as component (D) to give a platinum atomic mass of 120 ppm relative to the total mass of components (A), (B), (C), and (D). The mixture was stirred until uniform.
- a composition having a kinetic viscosity of 400 mm2/s and an H/Vi (the ratio of Si-H groups in the composition to alkenyl groups in the composition) of 1.8 was prepared by adding 60 parts by mass of methylvinylpolysiloxane (A3) as component (A), 40 parts by mass of methylvinylpolysiloxane (A4) as component (B), 4.23 parts by mass of methylhydrogenpolysiloxane (B2) as component (B), and 0.3 parts by mass of 1-ethynyl-1-cyclohexanol (F2) as component (F) and stirring until uniform.
- a platinum/vinylsiloxane complex was then added as component (D) to give a platinum atomic mass of 60 ppm relative to the total mass of components (A), (B), (C), and (D). The mixture was stirred until uniform.
- organopolysiloxane compositions obtained in the above examples were evaluated using the same methods and conditions as those used in 1-3) Evaluation of Solventless Composition (Silicone-Based (C) Component) above. These results are shown in Table 9 along with the above blended compositions.
- component (C) is not used, and the platinum concentration of the catalyst in component (D) is high at 160 ppm. In this case, the cure proceeds sufficiently, resulting in good results in terms of hardening, silicone migration, and adhesion, a light peel force, and a high residual adhesion rate, demonstrating the inherent properties of the release paper.
- Comparative Example 1 has a composition in which the platinum concentration of the catalyst in component (D) of Reference Example 1 has been reduced by half to 80 ppm. In this case, even after heat treatment at 120°C for 30 seconds, curing is insufficient, so the peeling force is heavy and the residual adhesion rate is low, and the inherent properties of silicone are not obtained. When the coated surface is rubbed, finger marks are clearly left and the amount of migration is large, so the curing, silicone migration and adhesion were rated as ⁇ , ⁇ and ⁇ .
- Example 1 the composition of Comparative Example 1 was mixed with a small amount of a compound having an acrylic group as component (C). By adding component (C), the curing proceeded sufficiently, there was no silicone migration, and the peel strength and residual adhesion rate were not significantly different from those of Reference Example 1, even though the platinum concentration of the catalyst in component (D) was 80 ppm. It can be confirmed that component (C) caused the curing reaction to proceed at a low platinum concentration.
- Example 8 shows that it is similarly effective not only when it has a (meth)acrylic group on a difunctional siloxane unit, but also when it is on a trifunctional siloxane.
- Example 10 the effect of compounds other than silicone as component (C) was evaluated using compositions that did not contain the solvent component (E).
- a comparison with Comparative Example 4 confirms that component (C) acts to reduce the peel force and increase the residual adhesion rate, which is close to the characteristics of Reference Example 2, which contains a large amount of component (D), and therefore promotes the curing reaction.
- component (C) is enhanced by the fact that the molecular terminal of component (A) has a trivinyl structure.
- Examples 14-15 are similar results of evaluating the effect of a silicone compound as component (C) using a composition that does not contain the solvent component (E), but by reducing component (D) to 20 ppm and changing the substrate to glassine paper, the curing, migration, and adhesion were evaluated under stricter conditions.
- the same trends as above were confirmed, and the effect of component (C) in improving curing and adhesion and reducing migration was confirmed.
- Examples 16 to 19 are results of evaluating the effect of component (C) when compounds having phenyl groups are used in components (A) and (B), and show a greater effect in improving adhesion than Examples 6 and 7.
- Example 20 to 23 the effect of component (C) was evaluated by adding component (H), and it was confirmed that this worked to reduce the peel force and increase the residual adhesion rate. This effect was the same for compositions that contained solvent and those that did not, but with the solvent-based composition, the curing temperature was as low as 100°C, and a notable effect was seen even under conditions where it is difficult to obtain curing properties.
- component (C) can be further enhanced by combining the terminal trivinyl structure of component (A), the inclusion of phenyl groups in components (A) and/or (B), and the addition of peroxide (H).
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Abstract
Description
1. 下記(A)~(D)成分を含有する硬化性オルガノポリシロキサン組成物。
(A)1分子中に2個以上のケイ素原子結合アルケニル基を有し、アルケニル基含有量が0.001~0.7モル/100g、1分子中に(メタ)アクリル基を3個以上有しないオルガノポリシロキサンであって、(A)成分のうち50質量%以上が、分子末端の少なくとも1つが下記式(1)で表されるシロキサン単位
(CH2=CH-)3SiO1/2 (1)
により封鎖されており、
回転粘度計により測定した25℃における粘度が7mPa・s以上、かつ30質量%トルエン溶解粘度(オルガノポリシロキサンをトルエン中に30質量%溶解した溶液の粘度)70,000mPa・s以下
であるオルガノポリシロキサン:100質量部、
(B)1分子中に平均2個以上のケイ素原子結合水素原子(Si-H基)を有し、1分子中に(メタ)アクリル基を3個以上有しないオルガノハイドロジェンポリシロキサン:(A)成分中のアルケニル基のモル数に対し、(B)成分中のSi-H基のモル数が1~10倍に相当する量、
(C)下記(C-1)及び(C-2)から選ばれる1種以上:(A)成分100質量部に対して0.01~5.0質量部、
(C-1)1分子中に(メタ)アクリル基を1個以上有し、かつオルガノポリシロキサンではない分子量72~1,000の化合物
(C-2)1分子中に(メタ)アクリル基を3個以上有するオルガノポリシロキサンであって、オルガノポリシロキサンのゲルパーミエーションクロマトグラフィー(GPC)分析(溶媒:トルエン)によるポリスチレン換算の重量平均分子量が500以上20,000以下である化合物
(D)白金族金属系触媒:(A)、(B)、(C)及び(D)成分の合計質量中の白金濃度が1~100質量ppmとなる量
2. さらに、(E)希釈溶剤を(A)成分100質量部に対して0~100,000質量部含有する1の硬化性オルガノポリシロキサン組成物。
3. さらに、(F)反応制御剤を(A)成分100質量部に対して0.01~5.0質量部含有する1又は2の硬化性オルガノポリシロキサン組成物。
4. (B)成分が、Si原子上置換基総数のうち5~30モル%がフェニル基である(B)成分を含有する1~3のいずれかの硬化性オルガノポリシロキサン組成物。
5. (A)成分が、Si原子上置換基総数のうち1~20モル%がフェニル基である(A)成分を含有する1~4のいずれかの硬化性オルガノポリシロキサン組成物。
6. さらに、(G)少なくとも2個のアルケニル基を有し、R10 (3-g1)R9 g1SiO1/2シロキサン単位(MR9R10単位)、R10SiO3/2シロキサン単位(TR10単位)(式中、R9はそれぞれ独立にアルケニル基であり、R10はそれぞれ独立に脂肪族不飽和結合を含有しない非置換又はハロゲン原子もしくはシアノ基置換の一価炭化水素基であり、g1は1~3の整数である。)を必須単位とし、MR9R10単位/TR10単位のモル比が2/8~8/2を満たし、25℃での粘度が1~1,000mPa・sの範囲を有する、分子末端がMR9R10単位、又はMR9R10単位と一部がシラノール基もしくはアルコキシ基であるオルガノポリシロキサンを(A)成分100質量部に対して0.1~20.0質量部含有する1~5のいずれかの硬化性オルガノポリシロキサン組成物。
7. (C)成分が、1分子中に(メタ)アクリル基を持つ二官能性及び/又は三官能性シロキサン単位を1個以上有するオルガノポリシロキサンである1~6のいずれかの硬化性オルガノポリシロキサン組成物。
8. さらに、(H)有機過酸化物を(A)成分100質量部に対して0.01~5.0質量部含有する1~7のいずれかの硬化性オルガノポリシロキサン組成物。
9. (H)成分が、分子内に2つ以上の過酸化結合を有する多官能型の有機過酸化物である8の硬化性オルガノポリシロキサン組成物。
10. (D)白金族金属系触媒を、(A)~(D)成分の合計質量中の白金濃度が1~40質量ppmとなる量で含有する1~9のいずれかの硬化性オルガノポリシロキサン組成物。
11. 剥離紙又は剥離フィルムに用いられる1~10のいずれかの硬化性オルガノポリシロキサン組成物。
12. 11記載の剥離紙又は剥離フィルム用オルガノポリシロキサン組成物を用いる剥離紙又は剥離フィルムの製造方法。
[(A)成分]
本発明の(A)成分は、1分子中に2個以上のケイ素原子結合アルケニル基を有し、アルケニル基含有量が0.001~0.7モル/100g、1分子中に(メタ)アクリル基を3個以上有しないオルガノポリシロキサンであって、(A)成分のうち50質量%以上が、分子末端の少なくとも1つが下記式(1)で表されるシロキサン単位
(CH2=CH-)3SiO1/2 (1)
により封鎖されており、回転粘度計により測定した25℃における粘度が7mPa・s以上、かつ30質量%トルエン溶解粘度(オルガノポリシロキサンをトルエン中に30質量%溶解した溶液の粘度)70,000mPa・s以下、であるオルガノポリシロキサンである。上記オルガノポリシロキサンは、1種単独で又は2種以上を適宜組み合わせて用いることができる。
MαMVi βDγDVi δTεTVi ζQη (2)
CH2=CR1COR2- (3)
装置:東ソー株式会社製高速GPCシステムHLC-8320
分析カラム:東ソー株式会社製TSKgel SuperHZ
展開溶媒:トルエン
流量:0.35mL/min
カラム温度:40℃
サンプル投入量:2,500μL
検出器:RI
分子量計算:ポリスチレン分子量標準サンプル分析値から作成した校正曲線により算出したポリスチレン換算分子量
MVi 2Dγ、MMViDγ、M2DγDVi δ、MMViDγDVi δ、MVi 3DγT1、MMVi 2DγT1,MVi 4DγT2、MVi 2DγDVi δ、MVi 2DγQ1、MMViDγQ1、MαDγDVi δTVi ζ、MαMVi αDγDVi δTVi ζ
(M、Mvi、D、DVi、T、Tvi、Q、γ、δ、ζは、上記式(2)と同じ。以下同様。)
MVi 2D100、M2D97DVi 3、MMViD97DVi 3、M2D26DVi 4、M2D96DVi 4、M2D95DVi 5、MMViD95DVi 5、MVi 3D100T1、MVi 4D100T2、MMViD100T2、MVi 2D97DVi 1、MMViD97DVi 1、MVi 2D95DVi 3、MMViD95DVi 3、M3D93DVi 3TVi 1、M2MViD93DVi 3TVi 1、MVi 2D20000、MMViD20000、M2D10000DVi 20、MMViD10000DVi 20、MVi 2D100γQ1、MMViD200Q1.
(B)成分は、1分子中に平均2個以上のケイ素原子結合水素原子(Si-H基)を有し、1分子中に(メタ)アクリル基を3個以上有しない(即ち、後述する(C)成分を含まない)オルガノハイドロジェンポリシロキサンであり、1種単独で又は2種以上を適宜組み合わせて用いることができる。このオルガノハイドロジェンポリシロキサンのSi-H基と、(A)成分のアルケニル基とが付加反応することにより、オルガノポリシロキサン架橋物が形成される。
MοMH πDρDH σTτTH φQχ (4)
MH 2Dρ、M2DH σ、M2DρDH σ、MH 2DρDH σ、MH 3DρT1、MH 4DρT2、MοDρDH σTH φMοDρDH σTH φQχ(M、MH、D、DH、T、TH、Q、ο、ρ、σ、φ、χは、上記式(4)と同じ。以下同様。)
MH 2D10、MH 2D100、M2DH 80、M2D27DH 3、M2D97DH 3、M2D26DH 4、M2D25DH 5、M2D24DH 6、M2D96DH 4、M2D95DH 5、MH 3D100T1、MH 4D100T2、MH 2D97DH 1、MH 2D95DH 3、M3D93DH 3TH 1、M5D10DH 40T1Q1、M5D10DH 40TH 1Q1、MH 5D10DH 40T1Q1、M2DH 30、M2DH 60
本発明の(C)成分は、(C-1)1分子中に(メタ)アクリル基を1個以上有し、かつオルガノポリシロキサンではない分子量72~1,000の化合物、及び/又は、(C-2)1分子中に(メタ)アクリル基を3個以上有するオルガノポリシロキサンであって、オルガノポリシロキサンのゲルパーミエーションクロマトグラフィー(GPC)分析(溶媒:トルエン)によるポリスチレン換算の重量平均分子量が500以上20,000以下である化合物である。上記(C)成分は、1種単独で又は2種以上を適宜組み合わせて用いることができる。上記(C-2)成分の重量平均分子量の上限は10,000以下が好ましく、5,000以下がより好ましい。なお、(C)成分の分子量は、シロキサンであれば29Si-NMRにより測定することができる。Si-NMRは装置としては、例えば、日本電子株式会社製のWin Lambdaを使用できる。測定方法は、直径10mmのテフロン(登録商標)製サンプル菅にサンプル1.5g、d-クロロホルム3.5gを入れよく攪拌後、Si-NMRにセットし、積算回数600回で測定する。
CH2=CR4COOR5 (5)
(式中、R4は水素原子又はメチル基、R5は水素原子、又は炭素数1~20のアルキル基、アリール基もしくはアラルキル基であり、分岐や環状構造を有していてもよく、エポキシ基、ウレタン結合、エーテル結合、イソシアネート結合、水酸基を含んでいてもよい。)
D1A d' (6)
(式中、D1AはR6ASiO2/2であり、R6はそれぞれ独立に炭素数1~18の非置換又は置換の一価炭化水素基、あるいはアルコキシ基、水素原子、水酸基、エポキシ基、ポリオキシアルキレン基であり、AはCH2=CR1COR2-であり、R1は水素原子もしくはメチル基、R1はOR3もしくはR3であり、R3は炭素数1~20の2価の基であり、分岐や環状構造を有していてもよく、エポキシ基、エステル結合、ウレタン結合、エーテル結合、イソシアネート結合、水酸基を含んでいてもよい。d’は、3~6である。)
M1 aM1A bD1 cD1A dT1 eT1A fQ1 g (7)
(式中、M1はR6 3SiO1/2、M1AはR6 2ASiO1/2、D1はR6 2SiO2/2、D1AはR6ASiO2/2、T1はR6SiO3/2、T1AはASiO3/2、Q1はSiO4/2であり、R6はそれぞれ独立に炭素数1~18の非置換又は置換の一価炭化水素基、あるいはアルコキシ基、水素原子、水酸基、エポキシ基、ポリオキシアルキレン基である。AはCH2=CR1COR2-であり、R1は水素原子もしくはメチル基、R2はOR3もしくはR3であり、R3は炭素数1~20の2価の基であり、分岐や環状構造を有していてもよく、エポキシ基、エステル結合、ウレタン結合、エーテル結合、イソシアネート結合、水酸基を含んでいてもよい。aは0~20の整数、bは0~5の整数であり、aが0の時のbは2~5の整数であり、aが1の時のbは1~5の整数であり、aが2~20の時のbは0~5の整数である。cは0~300の整数であり、dは0~200の整数であり、e、fはいずれも0~10の整数であり、gは0~5であり、b+d+fは3以上である。)
D1A 3、D1A 4、D1A 5、M1 2D1A 3D1 2、M1 3D1A 3T1 1、M1 3D1A 2T1A、M1 2D1 5D1A 3、M1 2D1 20D1A 5、M1Vi 2D1 20D1A 5、M1 2D1 30D1A 7、M1φ 2D1 30D1A 7、M1 2D1 25D1φ 5D1A 7、M1 2D1 65D1A 15、M1Vi 2D1 65D1A 15、M1 2D1 61D1OH 4D1A 15、M1 2D1 63D1OSiR’ 2D1A 15、M1H 2D1 65D1A 15、M1 1M1A 1D1 10D1A 3、M1OSiR’ 2D1 20D1A 5、M1 2D1 20D1A 5、M1 2D1 32D1A 5、M1A 2D1 37D1A 8、M1 3D1 20D1A 5T1 1、M1 3D1 110D1A 6T1 1、M1 2D1 170D1A 22、M1 2D1 170D1A 20Q1 1、M1 3D1 180D1A 18T1 1
(式中、M1ViはR7 2(CH2=CH)SiO1/2、M1φはR7 2(C6H5)SiO1/2、 M1HはR7 2(H)SiO1/2、M1OSiR’はR7 2(OSiR8 3)SiO1/2、D1φはR7(C6H5)SiO2/2、D1OHはR7(OH)SiO2/2、D1OSiR’はR7(OSiR8 3)SiO2/2、T1はR7SiO3/2、T1AはASiO3/2、Q1はSiO4/2であり、R7、R8は炭素数1~6の、メチル基、エチル基等のアルキル基であり、(C6H5)はフェニル基を表す。Aは上記式(7)と同じである。)
本発明の(D)白金族金属系触媒としては、付加反応触媒として用いられる公知のものが使用できる。このような白金族金属系触媒としては、例えば、白金系、パラジウム系、ロジウム系、ルテニウム系等の触媒が挙げられ、これらの中で特に白金系触媒が好ましく用いられる。この白金系触媒としては、例えば、白金系化合物、白金とビニルシロキサン等との錯体、塩化白金酸のアルコール溶液又はアルデヒド溶液、塩化白金酸と各種オレフィン類との錯塩、塩化白金酸とビニルシロキサン等との錯体等が挙げられる。
(E)成分の希釈溶剤は任意成分であり、本発明の組成物を無溶剤型として用いる場合は使用しないが、(A)成分が高粘度のオルガノポリシロキサンである場合は、当該希釈溶媒により組成物を低粘度化することで、基材上への薄膜塗工を容易に行うことができるようになる。また、オルガノポリシロキサン組成物を構成する複数の異なる成分が分離しないよう相溶化剤及び溶媒として作用して、均一な組成の塗工溶液を提供し、各種基材上へ塗布されたオルガノポリシロキサン組成物層へは良好なレベリング性と濡れ性を与えることで、均一な厚さで表面の滑らかな平滑性の高いシリコーン硬化皮膜を形成することを可能にする。
本発明の(F)付加反応制御剤は必要に応じ配合される成分で、白金族金属系触媒の触媒活性を制御するものであり、各種有機窒素化合物、有機リン化合物、アセチレン系化合物、オキシム化合物、有機クロロ化合物等が挙げられる。具体的には、1-エチニル-1-シクロヘキサノール、3-メチル-1-ブチン-3-オール、3,5-ジメチル-1-ヘキシン-3-オール、3-メチル-1-ペンテン-3-オール、フェニルブチノール等のアセチレン系アルコール、3-メチル-3-1-ペンテン-1-イン、3,5-ジメチル-1-ヘキシン-3-イン等のアセチレン系化合物、1,1-ジメチルプロピニルオキシトリメチルシラン等のアセチレン系化合物とアルコキシシランもしくはシロキサン又はハイドロジェンシランとの反応物、テトラメチルビニルシロキサン環状体等のビニルシロキサン、ベンゾトリアゾール等の有機窒素化合物及びその他の有機リン化合物、オキシム化合物、マレイン酸ジアリルなどのマレイン酸化合物、有機クロロ化合物等が挙げられる。
(G)成分として、基材密着性を向上させる成分を配合することができる。(G)成分は、(G)少なくとも2個のアルケニル基を有し、R10 (3-g1)R9 g1SiO1/2シロキサン単位(MR9R10単位)、R10SiO3/2シロキサン単位(TR10単位)(式中、R9はそれぞれ独立にアルケニル基であり、R10はそれぞれ独立に脂肪族不飽和結合を含有しない非置換又はハロゲン原子もしくはシアノ基置換の一価炭化水素基であり、g1は1~3の整数である。)を必須単位とし、MR9R10単位/TR10単位のモル比が2/8~8/2を満たし、25℃での粘度が1~1,000mPa・sの範囲を有する、分子末端がMR9R10単位、又はMR9R10単位と一部がシラノール基もしくはアルコキシ基であるオルガノポリシロキサンである。分子末端はMR1R2単位が結合していることが望ましいが、一部シラノール基やアルコキシ基とし末端を形成していてもかまわない。
本発明のオルガノポリシロキサン組成物には、剥離紙又は剥離フィルム用オルガノポリシロキサン組成物に通常配合する成分を、本発明の効果を損なわない範囲で配合することができる。
本発明のオルガノポリシロキサン組成物は、上記(A)~(D)成分及び必要に応じて(E)~(G)成分や任意成分のそれぞれの所定量を混合することによって得られる。
本発明のオルガノポリシロキサン組成物は、例えば、紙、プラスチックフィルム等のシート状基材に塗工ロール(3本ロール、5本ロール、グラビアロール、オフセットグラビアロール等)により塗布した後、常法によって加熱硬化される。こうしてシート状基材の片面に本発明のオルガノポリシロキサン組成物のシリコーン硬化皮膜が形成され、剥離シート等として好適に使用される。
(A)成分
・メチルビニルポリシロキサン(A1)
下記構造のビニル価が0.0073mol/100g、30質量%トルエン溶液の25℃における粘度が20,000mPa・sのポリシロキサン
{(CH2=CH)3SiO1/2}2{(CH2=CH)(CH3)SiO2/2}48
{(CH3)2SiO2/2}10000
・メチルビニルポリシロキサン(A2):式(1)で表されるシロキサン単位なし
下記構造のビニル価が0.0067mol/100g、30質量%トルエン溶液の25℃における粘度が20,000mPa・sのポリシロキサン
{(CH2=CH)(CH3)2SiO1/2}2{(CH2=CH)(CH3)SiO2/2}48
{(CH3)2SiO2/2}10000
・メチルビニルポリシロキサン(A3)
下記構造のビニル価が0.051mol/100g、25℃における粘度が400mPa・sのポリシロキサン
{(CH2=CH)3SiO1/2}2{(CH3)2SiO2/2}155
・メチルビニルポリシロキサン(A4):式(1)で表されるシロキサン単位なし
下記構造のビニル価が0.017mol/100g、25℃における粘度が400mPa・sのポリシロキサン
{(CH2=CH)(CH3)2SiO1/2}2{(CH3)2SiO2/2}155
・メチルフェニルビニルポリシロキサン(A5):式(1)で表されるシロキサン単位なし
下記構造のビニル価が0.002mol/100g、フェニル基含有量が2モル%、30質量%トルエン溶液の25℃における粘度が800mPa・sのポリシロキサン
{(CH2=CH)(CH3)2SiO1/2}2{(CH2=CH)(CH3)SiO2/2}6
{(CH3)2SiO2/2}5000{(C6H5)2SiO2/2}77
・メチルフェニルビニルポリシロキサン(A6)
下記構造のビニル価が0.018mol/100g、フェニル基含有量が10モル%、30質量%トルエン溶液の25℃における粘度が10,000mPa・sのポリシロキサン
{(CH2=CH)3SiO1/2}2{(CH2=CH)(CH3)SiO2/2}80
{(CH3)2SiO2/2}5000{(C6H5)2SiO2/2}550
・メチルハイドロジェンポリシロキサン(B1)
分子鎖両末端がトリメチルシロキシ基で封鎖され、(CH3)HSiO2/2単位と(CH3)2SiO2/2単位とからなるSi-H基含有量が1.42mol/100gで動粘度が110mm2/sであるメチルハイドロジェンポリシロキサン
{(CH3)3SiO1/2}2{(CH3)HSiO2/2}90{(CH3)2SiO2/2}10
・メチルハイドロジェンポリシロキサン(B2)
分子鎖両末端がトリメチルシロキシ基で封鎖され、両末端以外は全て(CH3)HSiO単位からなるSi-H基含有量が1.59mol/100gで動粘度が35mm2/sであるメチルハイドロジェンポリシロキサン
{(CH3)3SiO1/2}2{(CH3)HSiO2/2}60
・メチルフェニルハイドロジェンポリシロキサン(B3)
分子鎖両末端がトリメチルシロキシ基で封鎖され、両末端以外は全て(CH3)HSiO単位と(C6H5)2SiO単位とからなるSi-H基含有量が1.19mol/100g、フェニル基含有量が10モル%、動粘度が100mm2/sのメチルフェニルハイドロジェンポリシロキサン
{(CH3)3SiO1/2}2{(CH3)HSiO2/2}73{(C6H5)2SiO2/2}8
・メチルフェニルハイドロジェンポリシロキサン(B4)
分子鎖両末端がトリメチルシロキシ基で封鎖され、両末端以外は全て(CH3)HSiO単位と(C6H5)2SiO単位とからなるSi-H基含有量が0.84mol/100g、フェニル基含有量が22モル%、動粘度が120mm2/sのメチルフェニルハイドロジェンポリシロキサン
{(CH3)3SiO1/2}2{(CH3)HSiO2/2}70{(C6H5)2SiO2/2}20
・アクリル酸(C1):HOOCH=CH2;分子量72
・2-エチルヘキシルアクリレート(C2):
CH2=CH-(CO)-O-CH2CH(C2H5)C4H9;分子量213.5
・2-ヒドロキシエチルアクリレート(C3):
CH2=CH-(CO)-O-CH2CH2OH;分子量116
・4-ヒドロキシブチルアクリレートグリシジルエーテル(C4):
片末端にアクリル基、他片末端にグリシジルエーテル基を有する下記式で表される化合物;分子量200
M3 2D3 170D3A 22(C5);重量平均分子量16,526
M3 3D3 110D3A 6T3 1(C6);重量平均分子量9,482
M3 3D3 180D3A 18T3 1(C7);重量平均分子量16,726
M3A 2D3 37D3A 8(C8);重量平均分子量4,472
M3 2D3 20D3A 5(C9);重量平均分子量2,502
M3 2D3 20D3MA 5(C10);重量平均分子量2,516
D3A 4(C11);重量平均分子量689
T3 0.6T3A 4.4(OR11)7(C12);重量平均分子量928
(化学式中のM3はR11 3SiO1/2、M3AはR11 2A1SiO1/2、D3はR11 2SiO2/2、D3AはR11A1SiO2/2、D3MAはR11(MA)SiO2/2、T3はR11SiO3/2、T3AはA1SiO3/2であり、R11はメチル基、A1はCH2=CHCOO(CH2)3-、MAはCH2=CCH3COO(CH2)3-である。)
M3A 2D3 1(C13);重量平均分子量432
(化学式中のM3AはR11 2A1SiO1/2、D3はR11 2SiO2/2であり、R11はメチル基、A1はCH2=CHCOO(CH2)3-である。)
3-メチル-1-ブチン-3-オール(F1)
1-エチニル-1-シクロヘキサノール(F2)
(G)成分
25℃での粘度が30mPa・sであり、分子鎖の末端は主にジメチルビニルシリル基で封鎖されている、(CH3)2CH2=CHSiO1/2単位50モル%とCH3SiO3/2単位50モル%で構成されたオルガノポリシロキサン(G1)(ビニル基含有量=0.6モル/100g)
パーヘキサC(日本油脂株式会社製、1,1-ジ(t-ブチルパーオキシ)シクロヘキサン(H1)、10時間半減期温度90.7℃、発熱開始温度134℃)
1-1)溶剤型組成による評価
[実施例1]
(A)成分としてメチルビニルポリシロキサン(A1)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)1.54質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンD3A 4(C11)1.3質量部、(E)成分としてトルエン1,200質量部とヘキサン1,200質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi((A)成分中のアルケニル基に対する(B)成分中のSi-H基の割合(以下、同様。))=3のオルガノポリシロキサン組成物を調製した。
(C)成分として4-ヒドロキシブチルアクリレートグリシジルエーテル(C4)1.3質量部に変更した以外は、実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(C)成分を側鎖にアクリル基を有するポリシロキサンM3 2D3 170D3A 22(C5)1.3質量部に変更した以外は、実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(C)成分を側鎖にアクリル基を有するポリシロキサンM3 3D3 180D3A 18T3 1(C7)1.3質量部に変更した以外は、実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(C)成分を末端及び側鎖にアクリル基を有するポリシロキサンM3A 2D3 37D3A 8(C8)1.3質量部に変更した以外は、実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(C)成分を側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)4質量部に変更した以外は、実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(C)成分を側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)0.3質量部に変更した以外は、実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(C)成分をアクリル基含有ポリシロキサンT3 0.6T3A 4.4(OR7)7(C12)0.3質量部に変更した以外は、実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)及び(E)成分の合計質量に対して白金原子質量換算で30ppmになるように加え、均一になるまで攪拌する以外は、実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A1)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)、1.54質量部、(E)成分としてトルエン1,200質量部とヘキサン1,200質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で160ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi((A)成分中のアルケニル基に対する(B)成分中のSi-H基の割合(以下、同様。))=3のオルガノポリシロキサン組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A1)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)1.54質量部、(E)成分としてトルエン1,200質量部とヘキサン1,200質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(C)成分として両末端にアクリル基を有するオルガノシロキサンM3A 2D3 1(C13)1.3質量部を加え対外は実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A2)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)1.42質量部、を使用した以外は実施例1と同様の方法で、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
ポリエステルフィルムにNo.14のバーコーターを用いてオルガノポリシロキサン組成物を塗布し、120℃の熱風式乾燥機中で20秒間加熱して厚さ0.3g/m2のオルガノポリシロキサン組成物の硬化皮膜を有する剥離フィルムを得た。
得られた剥離フィルムを、25℃で24時間エージング後、剥離フィルムの硬化皮膜表面に、tesa-7475テープ(tesa UK Ltd.)を貼り合わせ、2.5cm×18cmの大きさに切断して試験片とした。この試験片をガラス板に挟み、70℃で20g/cm2の荷重下で20時間圧着後、試験片の一端を剥がし、テープの粘着剤付き基材端部を、ポリエステルフィルムに対して180度の角度の方向で、剥離速度0.3m/minで引張り、その際に剥離するのに要する力(即ち、「剥離力」)(N/25mm)を、引張試験機(株式会社島津製作所AGS-50G型)を用いて測定した。
上記剥離力の測定後のtesa-7475テープ(tesa UK Ltd.)をサス板に貼り合わせ、2kgテープローラーを1回往復させて圧着して30分放置後、tesa-7475テープの一端を剥がし、その端部をサス板に対して180度の角度の方向に引張り、剥離速度0.3m/minで剥がし、剥離するのに要した力を粘着力A(N/25mm)として測定した。
ブランクとして、未使用のtesa-7475テープをサス板に貼り合わせ、上記と同様に2kgテープローラーを1回往復させて圧着して30分放置後、tesa-7475テープの一端を剥がし、その端部をサス板に対して180度の角度の方向に引張り、剥離速度0.3m/minで剥がし、剥離するのに要した力を粘着力B(N/25mm)として測定した。残留接着率(%)を(A/B)×100で求めた。
ポリエステルフィルムにNo.14のバーコーターを用いてオルガノポリシロキサン組成物を塗布し、120℃の熱風式乾燥機中で20秒間加熱して厚さ0.3g/m2のオルガノポリシロキサン組成物の硬化皮膜を有する剥離フィルムを得た。乾燥機から剥離フィルムを取り出して直ちに硬化皮膜面を人差し指で10回強く擦り、赤油性インキを塗布してインキの染まり具合や硬化皮膜状態を観察した。
結果を、指痕が濃く見える場合は「×」、薄く見える場合は「△」、ほとんど見られない場合は「○」で表記した。
剥離力測定の場合と同様にしてポリエステルフィルム表面に形成されたオルガノポリシロキサン組成物の硬化皮膜の表面に、ポリエステルフィルムを重ね、室温で0.98MPaの加圧下で20時間圧着した後、ポリエステルフィルムを硬化皮膜から離した。ポリエステルフィルムの硬化皮膜と接していた表面に、赤油性インキを塗り、そのハジキ具合により、シリコーン移行性を評価した。
結果を、インキのハジキなし:シリコーン移行性なし又はかなり少ない「○」、インキハジキが部分的にあり:シリコーンの移行性が少しあり「△」、インキのハジキあり:シリコーンの移行性多い「×」で表記した。
剥離力測定の場合と同様にして作成した剥離フィルムを、25℃,50%RH条件で3日間放置した後、ポリエステルフィルム表面に形成されたオルガノポリシロキサン組成物の硬化皮膜を人差し指で10回強く擦り、赤油性インキを塗布してインキの染まり具合や硬化皮膜状態を観察した。
その結果を、インキによる染まりなし:密着性良好「○」、インキにより部分的に染まる:部分的に脱落あり「△」、インキにより全面が染まる:全面脱落「×」で表記した。
剥離フィルムを60℃,90%RH条件で1日間放置し、より厳しい条件下で密着性を低下させる方向へ促進した後、同様に密着性を評価してインキによる染まりなしの場合は特に密着性良好と評価して「◎」で表記した。
[実施例10]
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)4.23質量部、(C)成分としてアクリル酸(C1)0.5質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一となるまで攪拌し、動粘度401mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=1.8の組成物を調製した。
(C)成分を2-エチルヘキシルアクリレート(C2)0.5質量部にする以外は、実施例11と同様の方法で、動粘度403mm2/s、H/Vi=1.8の組成物を調製した。
(C)成分を2-ヒドロキシエチルアクリレート(C3)0.5質量部にした以外は、実施例11と同様の方法で、動粘度400mm2/s、H/Vi=1.8の組成物を調製した。
(C)成分を4-ヒドロキシブチルアクリレートグリシジルエーテル(C4)0.5質量部にする以外は、実施例1と同様の方法で、動粘度は405mm2/s、H/Vi=1.8の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)3.98質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)及び(D)成分の合計質量に対して白金原子質量換算で120ppmになるように加え、均一となるまで攪拌し、動粘度404mm2/s、H/Vi=1.7の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)4.23質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)及び(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一となるまで攪拌し、動粘度404mm2/s、H/Vi=1.8の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A4)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)1.92質量部、(C)成分としてアクリル酸(C1)0.5質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一となるまで攪拌し、動粘度420mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=1.8の組成物を調製した。
オルガノポリシロキサン組成物をRIテスター(株式会社IHI機械システム社製)の金属ロール上に塗布し、ゴムロールと接触させた2本のロールを45秒間回転させて組成物をロール上に均一に引き延ばした後、ゴムロールからポリエチレンラミネート紙へ組成物を転写した。組成物を転写したポリエチレンラミネート紙を、120℃の熱風式乾燥機中で20秒間加熱して、厚さ0.9~1.1g/m2のオルガノポリシロキサン組成物の硬化皮膜を有する剥離紙を得た。
この状態で、25℃で24時間エージング後、この剥離紙の硬化皮膜表面(ゴムロールからの転写面側)に、溶剤型アクリル粘着剤BPS―5127(東洋インキ株式会社製)を130μm厚さで塗布後、100℃の乾燥機中で180秒乾燥させた。乾燥後10分以上室温下に置いた後、上質紙を貼り合わせ、5.0cm×18cmの大きさに切断した。切断片に2kgローラーを1往復させ荷重を加え、室温下24時間エージング後、該試験片の一端を剥がしテープの粘着剤付き基材端部をポリエチレンラミネート紙に対して180度の角度の方向に剥離速度0.3m/minで引張り、その際に剥離するのに要する力(即ち、「剥離力」)(N/50mm)を、引張試験機(株式会社島津製作所AGS-50G型)を用いて測定した。
上記剥離力の場合と同じ方法でポリエチレンラミネート紙にシリコーン組成物を転写し乾燥機中で硬化させ剥離紙を得た。23℃で24時間エージング後、剥離紙上に日東電工NO31Bテープを貼り合わせた。同様に比較としてテフロン(登録商標)板に日東電工NO31Bテープを貼り合わせた。次にこれらの貼り合わせたサンプルを、70℃にて20g/cm2の荷重で圧着し20時間保存した。保存後23℃で30分以上放置後テープを引きはがし、ステンレス板に貼り合わせ、2kgローラーで1往復圧着後、接着力を引張試験機(株式会社島津製作所AGS-50G型)により測定した。
テフロン(登録商標)板貼り合わせテープの接着力をブランク値とし、サンプルの測定値のブランク値に対する割合(%)を残留接着率(%)とする。
上記剥離力の場合と同じ方法でポリエチレンラミネート紙にシリコーン組成物を転写し、120℃の熱風式乾燥機中で20秒間加熱して、厚さ0.9~1.1g/m2のオルガノポリシロキサン組成物の硬化皮膜を有する剥離紙を得た。乾燥機から剥離紙を取り出して直ちに硬化皮膜面を人差し指で10回強く擦り、赤油性インキを塗布してインキの染まり具合や硬化皮膜状態を観察した。
結果を、指痕が濃く見える場合は「×」、薄く見える場合は「△」、ほとんど見られない場合は「○」で表記した。
剥離力測定の場合と同様にして得られた剥離紙に形成されたオルガノポリシロキサン組成物の硬化皮膜の表面に、ポリエステルフィルムを重ね、室温で0.98MPaの加圧下で20時間圧着した後、ポリエステルフィルムを硬化皮膜から離した。ポリエステルフィルムの硬化皮膜と接していた表面に、赤油性インキを塗り、そのハジキ具合により、シリコーン移行性を評価した。
結果を、インキのハジキなし:シリコーン移行性なし又はかなり少ない「○」、インキハジキが部分的にあり:シリコーンの移行性が少しあり「△」、インキのハジキあり:シリコーンの移行性多い「×」で表記した。
剥離力測定の場合と同様にして作成した剥離紙を、25℃,50%RH条件で3日間放置した後、ポリエステルフィルム表面に形成されたオルガノポリシロキサン組成物の硬化皮膜を人差し指で10回強く擦り、赤油性インキを塗布してインキの染まり具合や硬化皮膜状態を観察した。
その結果を、インキによる染まりなし:密着性良好「○」、インキにより部分的に染まる:部分的に脱落あり「△」、インキにより全面が染まる:全面脱落「×」で表記した。
剥離フィルムを60℃,90%RH条件で1日間放置し、より厳しい条件下で密着性を低下させる方向へ促進した後、同様に密着性を評価してインキによる染まりなしの場合は特に密着性良好と評価して「◎」で表記した。
[実施例14]
(C)成分を側鎖にメタクリル基を有するオルガノシロキサンM3 2D3 20D3MA 5(C10)1質量部、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で20ppmになるように加えた以外は、実施例10と同様の方法で、粘度401mm2/s、H/Vi=1.8のオルガノポリシロキサン組成物を調製した。
(C)成分を側鎖にアクリル基を有するポリシロキサンM3 3D3 110D3A 6T3 1(C6)1質量部に変更した以外は、実施例14と同様の方法で、粘度410mm2/s、H/Vi=1.8のオルガノポリシロキサン組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)3.98質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)及び(D)成分の合計質量に対して白金原子質量換算で120ppmになるように加え、均一となるまで攪拌し、動粘度404mm2/s、H/Vi=1.7の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)4.23質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)及び(D)成分の合計質量に対して白金原子質量換算で20ppmになるように加え、均一となるまで攪拌し、動粘度404mm2/s、H/Vi=1.8の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A4)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)1.92質量部、(C)成分として側鎖にメタクリル基を有するオルガノシロキサンM3 2D3 20D3MA 5(C10)1質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で20ppmになるように加え、均一となるまで攪拌し、動粘度420mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=1.8の組成物を調製した。
上記で得られた組成物をRIテスター(株式会社IHI機械システム製)の金属ロール上に塗布し、金属ロールとゴムロールからなる2本のロールを45秒間回転させて均一に上記組成物を引き延ばした後、ゴムロールからグラシン紙ASP(Ahlstrom-munksjo社製)へ上記組成物を転写した。上記組成物を転写したグラシン紙を、120℃の熱風式乾燥機中で20秒間加熱して厚さ0.9~1.1g/m2の上記組成物の硬化皮膜を有する剥離紙を得た。この状態で、25℃で24時間エージング後、この剥離紙の硬化皮膜表面(ゴムロールからの転写面側)に、tesa-7475テープ(tesa UK Ltd.)を貼り合わせ、2.5cm×18cmの大きさに切断した。これをガラス板に挟み、70℃で20g/cm2の荷重下24時間エージング後、該試験片の一端を剥がしテープの粘着剤付き基材端部をグラシン紙に対して180度の角度の方向に剥離速度0.3m/minで引っ張り、その際に剥離するのに要する力(即ち、「剥離力」)(N/50mm)を、引張試験機(株式会社島津製作所製AGS-50G型)を用いて測定した。
上記剥離力の測定後のtesa-7475テープ(tesa UK Ltd.)をポリエステルフィルムに貼り合わせ、2kgローラーを1回往復させて荷重を加えた。30分放置後、tesa-7475テープの一端を剥がし、その端部をポリエステルフィルムに対して180度の角度の方向に引っ張り、剥離速度0.3m/minで剥がした。その際に剥離するのに要する力:剥離力A(N/25mm)を測定した。
ブランクとして、ポリエステルフィルムに未使用のtesa-7475テープを貼り、上記と同様に2kgローラーを1回往復させて荷重を加え、30分放置後、tesa-7475テープの一端を剥がし、その端部をポリエステルフィルムに対して180度の角度の方向に引っ張り、剥離速度0.3m/minで剥がした。その際に剥離するのに要する力:剥離力B(N/25mm)を測定した。残留接着率(%)を(A/B)×100で求めた。
剥離力測定の場合と同様にして作成した剥離紙を、乾燥機から剥離紙を取り出して直に硬化皮膜面を人差し指で10回強く擦り、赤マジックインキを塗布してインキの濃さや硬化皮膜状態を観察した。
結果を、指痕が濃く見える場合は「×」、薄く見える場合は「△」、ほとんど見られない場合は「○」で表記した。
剥離力測定の場合と同様にして作成した剥離紙の表面に、厚さ36μmのポリエチレンテレフタレートフィルムを重ね、室温で0.98MPaの加圧下で20時間圧着した後、ポリエチレンテレフタレートフィルムを硬化皮膜から外した。該ポリエチレンテレフタレートフィルムの硬化皮膜と接していた表面に、油性のインキ(商品名:マジックインキ、寺西化学工業株式会社製)を塗り、そのハジキ具合により、シリコーン移行性を次の基準で評価した。
結果を、インキのハジキなし:シリコーン移行性なし又はかなり少ない「○」、インキのハジキあり:シリコーンの移行性多い「×」で表記した。
剥離力測定の場合と同様にして作成した剥離紙を、25℃,50%RH条件下に3日間放置した後、ポリエチレンラミネート紙表面に形成されたオルガノポリシロキサン組成物の硬化皮膜を人差し指で10回強く擦り、赤油性インキを塗布してインキの染まり具合や硬化皮膜状態を観察した。
結果を、インキによる染まりなし:密着性良好「○」、インキにより部分的に染まる:部分的に脱落あり「△」、インキにより全面が染まる:全面脱落「×」で表記した。
[実施例16]
(A)成分としてメチルビニルポリシロキサン(A1)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)1.04質量部、メチルフェニルハイドロジェンポリシロキサン(B3)0.60質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)1.3質量部、(E)成分としてトルエン1,200質量部とヘキサン1,200質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部、(G)成分としてオルガノポリシロキサン(G1)0.60質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi=2のオルガノポリシロキサン組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A1)60質量部及び、メチルフェニルビニルポリシロキサン(A5)40質量部及び、(B)成分としてメチルハイドロジェンポリシロキサン(B1)1.46質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)1.3質量部、(E)成分としてトルエン1,200質量部とヘキサン1,200質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi=4のオルガノポリシロキサン組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A1)60質量部及び、メチルフェニルビニルポリシロキサン(A5)40質量部及び、(B)成分としてメチルハイドロジェンポリシロキサン(B1)0.70質量部、メチルフェニルハイドロジェンポリシロキサン(B3)0.47質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)1.3質量部、(E)成分としてトルエン1,200質量部とヘキサン1,200質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部、(G)成分としてオルガノポリシロキサン(G1)0.60質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi=1.7のオルガノポリシロキサン組成物を調製した。
(A)成分としてメチルフェニルビニルポリシロキサン(A6)100質量部及び、(B)成分としてメチルフェニルハイドロジェンポリシロキサン(B4)4.29質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)1.3質量部、(E)成分としてトルエン1,200質量部とヘキサン1,200質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部、(G)成分としてオルガノポリシロキサン(G1)0.60質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi=1.7のオルガノポリシロキサン組成物を調製した。
3-1)溶剤型組成による評価
[実施例20]
(A)成分としてメチルビニルポリシロキサン(A1)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)1.54質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)1質量部、(E)成分としてトルエン1561質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部、(H)成分としてパーヘキサC(H1)1質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一となるまで攪拌し、動粘度10mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=3の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A1)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)1.54質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)1質量部、(E)成分としてトルエン1,561質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一となるまで攪拌し、動粘度10mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=3の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A1)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)、1.54質量部、(E)成分としてトルエン1,561質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で160ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi((A)成分中のアルケニル基に対する(B)成分中のSi-H基の割合(以下、同様。))=3のオルガノポリシロキサン組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A1)100質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B1)1.54質量部、(E)成分としてトルエン1,561質量部、(F)成分として3-メチル-1-ブチン-3-オール(F1)3質量部を加え、均一になるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)、(D)成分の合計質量に対して白金原子質量換算で80ppmになるように加え、均一になるまで攪拌し、粘度10mm2/s、H/Vi=3のオルガノポリシロキサン組成物を調製した。
ポリエチレンラミネート紙にNo.14のバーコーターを用いてオルガノポリシロキサン組成物を塗布し、100℃の熱風式乾燥機中で30秒間加熱して、厚さ0.9~1.1g/m2のオルガノポリシロキサン組成物の硬化皮膜を有する剥離紙を得た。
この状態で、25℃で24時間エージング後、この剥離紙の硬化皮膜表面側に、溶剤型アクリル粘着剤BPS-5127(東洋インキ株式会社製)を塗布後、100℃の乾燥機中で180秒乾燥させた。乾燥後10分以上室温下に置いた後、上質紙を貼り合わせ、5.0cm×18cmの大きさに切断した。切断片に2kgローラーを1往復させ荷重を加え、室温下24時間エージング後、該試験片の一端を剥がしテープの粘着剤付き基材端部をポリエチレンラミネート紙に対して180度の角度の方向に剥離速度0.3m/minで引張り、その際に剥離するのに要する力(即ち、「剥離力」)(N/50mm)を、引張試験機(株式会社島津製作所AGS-50G型)を用いて測定した。
上記剥離力の場合と同じ方法でポリエチレンラミネート紙にシリコーン組成物を塗工硬化させて剥離紙を得た。23℃で24時間エージング後、剥離紙上にtesa-7475テープ(tesa UK Ltd.)を貼り合わせ、2.5cm×18cmの大きさに切断した。これをガラス板に挟み、70℃で20g/cm2の荷重下24時間エージング後引きはがし、ステンレス板に貼り合わせ、2kgローラーで1往復圧着して30分放置後、tesa-7475テープの一端を剥がし、その端部をサス板に対して180度の角度の方向に引張り、剥離速度0.3m/minで剥がし、剥離するのに要した力を粘着力A(N/25mm)として測定した。引張試験機(株式会社島津製作所AGS-50G型)により測定した。
ブランクとして、未使用のtesa-7475テープをサス板に貼り合わせ、上記と同様に2kgテープローラーを1回往復させて圧着して30分放置後、tesa-7475テープの一端を剥がし、その端部をサス板に対して180度の角度の方向に引張り、剥離速度0.3m/minで剥がし、剥離するのに要した力を粘着力B(N/25mm)として測定した。残留接着率(%)を(A/B)×100で求めた。
上記剥離力の場合と同じ方法でポリエチレンラミネート紙にシリコーン組成物を塗工し、100℃の熱風式乾燥機中で30秒間加熱して、厚さ0.9~1.1g/m2のオルガノポリシロキサン組成物の硬化皮膜を有する剥離紙を得た。乾燥機から剥離紙を取り出して直ちに硬化皮膜面を人差し指で10回強く擦り、赤油性インキを塗布してインキの染まり具合や硬化皮膜状態を観察した。
結果を、指痕が濃く見える場合は「×」、薄く見える場合は「△」、ほとんど見られない場合は「○」で表記した。
剥離力測定の場合と同様にして得られた剥離紙に形成されたオルガノポリシロキサン組成物の硬化皮膜の表面に、ポリエステルフィルムを重ね、室温で0.98MPaの加圧下で20時間圧着した後、ポリエステルフィルムを硬化皮膜から離した。ポリエステルフィルムの硬化皮膜と接していた表面に、赤油性インキを塗り、そのハジキ具合により、シリコーン移行性を評価した。
結果を、インキのハジキなし:シリコーン移行性なし又はかなり少ない「○」、インキハジキが部分的にあり:シリコーンの移行性が少しあり「△」、インキのハジキあり:シリコーンの移行性多い「×」で表記した。
[実施例22]
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)4.23質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)1質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部、(H)成分としてパーヘキサC(H1)1質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で60ppmになるように加え、均一となるまで攪拌し、動粘度406mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=1.8の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)4.23質量部、(C)成分として側鎖にアクリル基を有するポリシロキサンM3 2D3 20D3A 5(C9)1質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で60ppmになるように加え、均一となるまで攪拌し、動粘度405mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=1.8の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)4.23質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で120ppmになるように加え、均一となるまで攪拌し、動粘度400mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=1.8の組成物を調製した。
(A)成分としてメチルビニルポリシロキサン(A3)60質量部、メチルビニルポリシロキサン(A4)40質量部、(B)成分としてメチルハイドロジェンポリシロキサン(B2)4.23質量部、(F)成分として1-エチニル-1-シクロヘキサノール(F2)0.3質量部を加え、均一となるまで攪拌した後、(D)成分として白金とビニルシロキサンとの錯体を(A)、(B)、(C)及び(D)成分の合計質量に対して白金原子質量換算で60ppmになるように加え、均一となるまで攪拌し、動粘度400mm2/s、H/Vi(組成物中のアルケニル基に対する組成物中のSi-H基の割合)=1.8の組成物を調製した。
Claims (12)
- 下記(A)~(D)成分を含有する硬化性オルガノポリシロキサン組成物。
(A)1分子中に2個以上のケイ素原子結合アルケニル基を有し、アルケニル基含有量が0.001~0.7モル/100g、1分子中に(メタ)アクリル基を3個以上有しないオルガノポリシロキサンであって、(A)成分のうち50質量%以上が、分子末端の少なくとも1つが下記式(1)で表されるシロキサン単位
(CH2=CH-)3SiO1/2 (1)
により封鎖されており、
回転粘度計により測定した25℃における粘度が7mPa・s以上、かつ30質量%トルエン溶解粘度(オルガノポリシロキサンをトルエン中に30質量%溶解した溶液の粘度)70,000mPa・s以下
であるオルガノポリシロキサン:100質量部、
(B)1分子中に平均2個以上のケイ素原子結合水素原子(Si-H基)を有し、1分子中に(メタ)アクリル基を3個以上有しないオルガノハイドロジェンポリシロキサン:(A)成分中のアルケニル基のモル数に対し、(B)成分中のSi-H基のモル数が1~10倍に相当する量、
(C)下記(C-1)及び(C-2)から選ばれる1種以上:(A)成分100質量部に対して0.01~5.0質量部、
(C-1)1分子中に(メタ)アクリル基を1個以上有し、かつオルガノポリシロキサンではない分子量72~1,000の化合物
(C-2)1分子中に(メタ)アクリル基を3個以上有するオルガノポリシロキサンであって、オルガノポリシロキサンのゲルパーミエーションクロマトグラフィー(GPC)分析(溶媒:トルエン)によるポリスチレン換算の重量平均分子量が500以上20,000以下である化合物
(D)白金族金属系触媒:(A)、(B)、(C)及び(D)成分の合計質量中の白金濃度が1~100質量ppmとなる量 - さらに、(E)希釈溶剤を(A)成分100質量部に対して0~100,000質量部含有する請求項1記載の硬化性オルガノポリシロキサン組成物。
- さらに、(F)反応制御剤を(A)成分100質量部に対して0.01~5.00質量部含有する請求項1記載の硬化性オルガノポリシロキサン組成物。
- (B)成分が、Si原子上置換基総数のうち5~30モル%がフェニル基である(B)成分を含有する請求項1記載の硬化性オルガノポリシロキサン組成物。
- (A)成分が、Si原子上置換基総数のうち1~20モル%がフェニル基である(A)成分を含有する請求項1記載の硬化性オルガノポリシロキサン組成物。
- さらに、(G)少なくとも2個のアルケニル基を有し、R10 (3-g1)R9 g1SiO1/2シロキサン単位(MR9R10単位)、R10SiO3/2シロキサン単位(TR10単位)(式中、R9はそれぞれ独立にアルケニル基であり、R10はそれぞれ独立に脂肪族不飽和結合を含有しない非置換又はハロゲン原子もしくはシアノ基置換の一価炭化水素基であり、g1は1~3の整数である。)を必須単位とし、MR9R10単位/TR10単位のモル比が2/8~8/2を満たし、25℃での粘度が1~1,000mPa・sの範囲を有する、分子末端がMR9R10単位、又はMR9R10単位と一部がシラノール基もしくはアルコキシ基であるオルガノポリシロキサンを(A)成分100質量部に対して0.1~20.0質量部含有する請求項1記載の硬化性オルガノポリシロキサン組成物。
- (C)成分が、1分子中に(メタ)アクリル基を持つ二官能性及び/又は三官能性シロキサン単位を1個以上有するオルガノポリシロキサンである請求項1記載の硬化性オルガノポリシロキサン組成物。
- さらに、(H)有機過酸化物を(A)成分100質量部に対して0.01~5.0質量部含有する請求項1記載の硬化性オルガノポリシロキサン組成物。
- (H)成分が、分子内に2つ以上の過酸化結合を有する多官能型の有機過酸化物である請求項8記載の硬化性オルガノポリシロキサン組成物。
- (D)白金族金属系触媒を、(A)~(D)成分の合計質量中の白金濃度が1~40質量ppmとなる量で含有する請求項1記載の硬化性オルガノポリシロキサン組成物。
- 剥離紙又は剥離フィルムに用いられる請求項1~10のいずれか1項記載の硬化性オルガノポリシロキサン組成物。
- 請求項11記載の剥離紙又は剥離フィルム用オルガノポリシロキサン組成物を用いる剥離紙又は剥離フィルムの製造方法。
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| JP (1) | JP2024148039A (ja) |
| KR (1) | KR20250166316A (ja) |
| CN (1) | CN120936676A (ja) |
| TW (1) | TW202500675A (ja) |
| WO (1) | WO2024209860A1 (ja) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09143371A (ja) * | 1995-09-21 | 1997-06-03 | Toray Dow Corning Silicone Co Ltd | 剥離性硬化皮膜形成性オルガノポリシロキサン組成物 |
| JP2011148981A (ja) * | 2009-12-21 | 2011-08-04 | Shin-Etsu Chemical Co Ltd | シリコーン樹脂組成物及びその硬化物 |
| WO2017010340A1 (ja) * | 2015-07-16 | 2017-01-19 | 信越化学工業株式会社 | 剥離紙又は剥離フィルム用シリコーン組成物、剥離紙及び剥離フィルム |
| WO2021166653A1 (ja) * | 2020-02-18 | 2021-08-26 | 信越化学工業株式会社 | 剥離紙又は剥離フィルム製造用シリコーン組成物、及び剥離紙又は剥離フィルム |
| WO2021192100A1 (ja) * | 2020-03-25 | 2021-09-30 | 信越化学工業株式会社 | 剥離シート用シリコーン組成物及び剥離シート |
-
2023
- 2023-04-04 JP JP2023060920A patent/JP2024148039A/ja active Pending
-
2024
- 2024-03-06 KR KR1020257036382A patent/KR20250166316A/ko active Pending
- 2024-03-06 WO PCT/JP2024/008398 patent/WO2024209860A1/ja active Pending
- 2024-03-06 CN CN202480021602.7A patent/CN120936676A/zh active Pending
- 2024-03-15 TW TW113109627A patent/TW202500675A/zh unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09143371A (ja) * | 1995-09-21 | 1997-06-03 | Toray Dow Corning Silicone Co Ltd | 剥離性硬化皮膜形成性オルガノポリシロキサン組成物 |
| JP2011148981A (ja) * | 2009-12-21 | 2011-08-04 | Shin-Etsu Chemical Co Ltd | シリコーン樹脂組成物及びその硬化物 |
| WO2017010340A1 (ja) * | 2015-07-16 | 2017-01-19 | 信越化学工業株式会社 | 剥離紙又は剥離フィルム用シリコーン組成物、剥離紙及び剥離フィルム |
| WO2021166653A1 (ja) * | 2020-02-18 | 2021-08-26 | 信越化学工業株式会社 | 剥離紙又は剥離フィルム製造用シリコーン組成物、及び剥離紙又は剥離フィルム |
| WO2021192100A1 (ja) * | 2020-03-25 | 2021-09-30 | 信越化学工業株式会社 | 剥離シート用シリコーン組成物及び剥離シート |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024148039A (ja) | 2024-10-17 |
| CN120936676A (zh) | 2025-11-11 |
| KR20250166316A (ko) | 2025-11-27 |
| TW202500675A (zh) | 2025-01-01 |
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