WO2023195390A1 - シリコーン粘着剤組成物、粘着テープおよび粘着フィルム - Google Patents
シリコーン粘着剤組成物、粘着テープおよび粘着フィルム Download PDFInfo
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- WO2023195390A1 WO2023195390A1 PCT/JP2023/012585 JP2023012585W WO2023195390A1 WO 2023195390 A1 WO2023195390 A1 WO 2023195390A1 JP 2023012585 W JP2023012585 W JP 2023012585W WO 2023195390 A1 WO2023195390 A1 WO 2023195390A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on 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; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
Definitions
- the present invention relates to a silicone adhesive composition, and more particularly to a silicone adhesive composition that provides an adhesive layer that can maintain high adhesive strength and holding power even at high temperatures exceeding 150°C, and
- the present invention relates to an adhesive tape and an adhesive film having an adhesive layer made of a cured product.
- the polysiloxane that makes up the silicone adhesive has excellent heat resistance, cold resistance, weather resistance, electrical insulation, and chemical resistance. Therefore, adhesive tapes and adhesive films using silicone adhesives are used in harsh environments where acrylic adhesives, rubber adhesives, and urethane adhesives would deteriorate or deteriorate.
- Examples of applications used in high-temperature environments include tapes for masking and temporary fixing of parts in reflow processes and resin sealing processes for semiconductor parts, and heat seal tapes for protecting the surfaces of heating heaters. .
- heat treatments have been performed at higher temperatures than before, and silicone pressure-sensitive adhesives are required to have higher heat resistance.
- the adhesive tape For masking tapes used under high temperatures, the adhesive tape must not peel off even under high temperatures. In addition, the heat-seal tape must not be easily peeled off when heated by a heater.
- Adhesive tapes using conventional silicone adhesives are used for the above purposes, when fixing parts on substrates, when wrapping and pasting around small-diameter rod-shaped adherends, or when attaching convex-shaped adhesive tapes.
- the edges of the adhesive tape may peel off and float up, or the adhesive tape may peel off and parts may fall off. This is because the silicone adhesive is softened by heating, and the adhesive strength of the adhesive layer decreases accordingly.
- Patent Document 1 describes that by reducing the amounts of octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane in a silicone adhesive composition, adhesive residue of the adhesive is reduced after heating at 250 to 290°C. There is.
- Patent Document 2 by specifying the storage elastic modulus G' and tan ⁇ of a silicone adhesive layer cured with an organic peroxide, the adhesive strength and adhesive residue after heating at 280°C or reflow at 300°C are improved. ing.
- Patent Document 3 by blending a peroxide-curing silicone resin, an organic peroxide curing agent, and an addition reaction-curing silicone rubber in a specific ratio, excellent loadability can be achieved even at high temperatures of 230°C or 250°C. It has been reported that it exhibits durability.
- Patent Document 1 only reports on the improvement in heat resistance based on an adhesive residue test after heating at 250 to 290°C, and does not mention adhesive strength at high temperatures. Furthermore, Patent Document 2 only measures the distance at which the adhesive tape peels off in a repulsion resistance test, while Patent Document 3 measures the amount of deviation in the shear direction when a load is applied to the adhesive tape and the peeling distance in the 90° direction. It only measures the amount. All of them show that the adhesive tapes are difficult to peel off at high temperatures, but it cannot be said that the strong adhesive strength at room temperature is maintained even at high temperatures.
- Patent Document 4 by adding a polyorganosiloxane containing an SiH group and a rare earth carboxylate to an organic peroxide-curable silicone adhesive composition, It has also been reported that adhesive strength and holding power can be maintained.
- the adhesive force at room temperature was 5.2 to 10.1 N/25 mm, but at 180°C it was 1.7 to 2.9 N/25 mm, which did not prevent the adhesive force from decreasing during heating. , it cannot be said that it maintains high adhesive strength at room temperature.
- the present invention was made in view of the above circumstances, and provides a silicone adhesive composition that provides an adhesive layer that can maintain high adhesive strength and holding power even at high temperatures exceeding 150°C, and a cured product of the adhesive composition.
- the present invention relates to an adhesive tape and an adhesive film having an adhesive layer consisting of.
- the present inventors found that in the composition of an addition reaction-curing silicone adhesive, (A) a linear organopolysiloxane containing a specific amount of alkenyl groups, (B) ) an organopolysiloxane resin having one or more alkenyl groups in one molecule and having a specific ratio of R 3 3 SiO 1/2 units and SiO 4/2 units, and (C) having a specific ratio of hydrosilyl groups;
- the present inventors have discovered that the above-mentioned problems can be achieved by blending specific amounts of organohydrogenpolysiloxanes having an average degree of siloxane polymerization of 100 or less, and have accomplished the present invention.
- the present invention provides a silicone adhesive composition containing the following components (A) to (D).
- (A) Linear organopolysiloxane having two or more alkenyl groups in one molecule and having an alkenyl group content of 0.0001 to 0.03 mol/100g: 20 to 65 parts by mass
- (B) 1 It has one or more alkenyl groups in the molecule, and further has R 3 3 SiO 1/2 units and SiO 4/2 units, (R 3 3 SiO 1/2 units) / (SiO 4/2 units)
- An organopolysiloxane resin having a molar ratio of 0.5 to 1.5 (wherein R 3 is, independently of each other, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms) ): 35 to 80 parts by mass (however, the total of components (A) and (B) above is 100 parts by mass)
- (C) having 3 or more hydrogen atoms bonded to silicon atoms in one molecule,
- the present invention also provides the silicone pressure-sensitive adhesive composition described above, which further has at least one of the following constituent features [1] to [5].
- R 1 is independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, provided that at least two of R 1 are each having 2 to 10 carbon atoms. It is an alkenyl group-containing organic group, the ratio of the number of hydroxyl groups to the total number of R 1 is 10% or less, the alkenyl group content in the organopolysiloxane is 0.0001 to 0.03 mol/100g, and a is the number at which the viscosity at 25° C.
- the silicone adhesive composition in which the component (C) is represented by the following formula (4) (In the formula, R 6 is independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms that does not have a hydroxyl group or an aliphatic unsaturated bond, and e is 0 or 1 and f and g are integers of 1 ⁇ f ⁇ 98, 0 ⁇ g ⁇ 60, 3 ⁇ 2e+f ⁇ 100, and 3 ⁇ f+g+2 ⁇ 100, and hydrogen atoms bonded to silicon atoms and The ratio of the total number of hydrogen atoms bonded to silicon atoms to the total number of groups R 6 bonded to silicon atoms is 20% to 50%, and the ratio of the number of hydroxyl groups to the total number of R 6 is 10% or less.
- Component (B) further has R 4 R 5 SiO 2/2 units (in the formula, R 4 is a group represented by R 3 above other than an alkenyl group, and R 5 has 2 to 2 carbon atoms) 10 alkenyl groups), an organopolysiloxane resin having a molar ratio of 0.01 to 0.5 represented by (R 4 R 5 SiO 2/2 units)/(SiO 4/2 units), Silicone adhesive composition.
- the present invention provides a cured product obtained by curing the silicone adhesive composition, and an adhesive tape or adhesive film comprising the cured product (adhesive layer).
- the adhesive tape includes a base material and an adhesive layer formed on at least one side of the base material, and the adhesive layer is the above-mentioned cured product.
- Another embodiment preferably provides the above-described pressure-sensitive adhesive film comprising a base material and an adhesive layer formed on at least one side of the base material, wherein the pressure-sensitive adhesive layer is the above-mentioned cured product.
- An adhesive tape or adhesive film equipped with an adhesive layer formed by curing the silicone adhesive composition of the present invention can maintain high adhesive strength and holding power even at high temperatures exceeding 150°C. Therefore, this adhesive tape or adhesive film can be suitably used as a masking tape, a temporary fixing tape, or a heat seal tape in the manufacturing process of electronic components and semiconductor components.
- Component (A) is a linear organopolysiloxane having two or more alkenyl groups in one molecule.
- Component (A) may be any linear organopolysiloxane having two or more alkenyl groups in one molecule, and may be used alone or in combination of two or more.
- Component (A) may be any oil-like or raw rubber-like organopolysiloxane, and is preferably a raw rubber-like organopolysiloxane.
- the viscosity at 25° C. is preferably 1,000 mPa ⁇ s or more, more preferably 10,000 mPa ⁇ s or more, particularly preferably 50,000 mPa ⁇ s or more at 25°C.
- the viscosity of a solution dissolved in toluene to give a concentration of 30% by mass is preferably 1,000 to 200,000 mPa ⁇ s, more preferably 5,000 to 150,000 mPa ⁇ s, Further, it is preferable that the pressure is 10,000 to 120,000 mPa ⁇ s, and particularly preferably 15,000 to 100,000 mPa ⁇ s. If the viscosity is less than the above lower limit, uniform coating may be difficult, or the adhesive strength and holding power of the resulting adhesive layer may decrease. If the above upper limit is exceeded, the viscosity of the composition becomes so high that it becomes difficult to stir and mix, which may result in poor workability. In this specification, viscosity is a value measured using a rotational viscometer at 25°C (the same applies hereinafter).
- the amount of alkenyl groups contained in component (A) is preferably 0.0001 to 0.03 mol, more preferably 0.0002 to 0.02 mol/100 g, and 0.0003 to 0.01 mol per 100 g of organopolysiloxane. /100g is more preferable, and 0.0005 to 0.005mol/100g is even more preferable. If it is less than the above lower limit, the curability may decrease, or the holding power or adhesive force of the resulting adhesive layer may decrease. If the above upper limit is exceeded, the resulting adhesive layer may have a high crosslinking density and a reduced adhesive strength.
- This alkenyl group amount can usually be determined by a known structural analysis method such as NMR analysis (the same applies hereinafter).
- Organopolysiloxane is preferably represented by the following formula (1).
- R 1 is independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, provided that at least two of R 1 are each having 2 to 10 carbon atoms. It is an alkenyl group-containing organic group, and a is a number such that the viscosity of a solution of the organopolysiloxane dissolved in toluene to a concentration of 30% by mass at 25° C. is 1,000 to 200,000 mPa ⁇ s).
- R 1 is independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and at least two of R 1 are hydroxyl groups or substituted or unsubstituted monovalent hydrocarbon groups having 1 to 10 carbon atoms.
- It is an alkenyl group-containing organic group.
- the alkenyl group-containing organic group has 2 to 10 carbon atoms, preferably 2 to 8 carbon atoms, and may contain an oxygen atom. Examples include alkenyl groups such as a vinyl group, allyl group, hexenyl group, and octenyl group, and cycloalkenyl alkyl groups such as a cyclohexenylethyl group.
- alkenyl group-containing monovalent hydrocarbon group which may have an oxygen atom examples include acryloylalkyl groups and methacryloylalkyl groups such as acryloylpropyl group, acryloylmethyl group, methacryloylpropyl group, and methacryloylmethyl group.
- the monovalent hydrocarbon group other than the alkenyl group-containing organic group is a monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond.
- an alkyl group having 1 to 6 carbon atoms such as a methyl group, ethyl group, propyl group, butyl group, a cycloalkyl group preferably having 5 to 8 carbon atoms such as a cyclohexyl group, preferably a carbon atom such as a phenyl group, a tolyl group, etc.
- An aryl group having 6 to 10 carbon atoms, an aralkyl group preferably having 7 to 10 carbon atoms such as a benzyl group, or a hydroxypropyl group, a cyanoethyl group, a 3-chloropropyl group, a 3,3,3-trifluoropropyl group, 3,
- Some of the hydrogen atoms bonded to carbon atoms such as 3,4,4,5,5,6,6,6-nonafluorohexyl group, methoxypropyl group, ethoxypropyl group, ⁇ -glycidoxypropyl group, etc.
- a monovalent hydrocarbon group having 1 to 10 carbon atoms which is completely substituted with a hydroxy group, a cyano group, a halogen atom, an alkoxy group, an alkoxysilyl group, a polyoxyalkylene group, an epoxy group, a carboxyl group, etc.
- a methyl group or a phenyl group is preferred, and a methyl group is particularly preferred. It is particularly preferred that the ratio of the number of methyl groups to the total number of R 1 is 70% or more, preferably 80% or more, and more preferably 90% or more.
- formula (1) includes an aryl group or an aralkyl group as R 1 , the total number of aryl groups and aralkyl groups relative to the total number of groups bonded to the silicon atom of the organopolysiloxane (i.e., R 1 in formula (1)) It is preferable that the number ratio is 0.1 to 30%. If the amount of the aryl group or aralkyl group exceeds 30%, the curability of the composition may decrease or the holding power of the resulting pressure-sensitive adhesive layer may decrease.
- the ratio of the number of hydroxyl groups to the total number of R 1 is preferably 10% or less, more preferably 0.001 to 5%, and even more preferably 0.002 to 5%.
- a value of 1% is preferable. That is, the amount of hydroxyl groups in component (A) is preferably 0.00002 to 0.15 mol/100g, particularly 0.00005 to 0.03 mol/100g.
- component (A) can undergo a condensation reaction with component (B) and component (B'), which will be described later.
- the amount of SiOH groups can usually be determined by a known structural analysis method such as NMR analysis.
- a is preferably 100 to 20,000, more preferably 500 to 15,000, more preferably 1,000 to 13,500, and even more preferably 2,000. ⁇ 12,000. If a is less than the above lower limit, uniform coating may become difficult, or the adhesive strength and holding power of the resulting adhesive layer may decrease. If the above upper limit is exceeded, the viscosity of the composition becomes so high that it becomes difficult to stir and mix, which may result in poor workability.
- Component (A) is preferably a raw rubber-like organopolysiloxane represented by the following formula (2) or (3).
- R 2 is independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond
- X is a monovalent hydrocarbon group having 2 to 10 carbon atoms.
- 10 alkenyl group-containing organic groups b is an integer of 0 to 3
- c is an integer of 0 or more
- c' is an integer of 2 or more
- 2b+c ⁇ 2 is an integer of 100 or more.
- c+d and c'+d are integers such that the organopolysiloxane has the above-mentioned viscosity. More preferably, 100 ⁇ c+d ⁇ 20,000 and 100 ⁇ c'+d ⁇ 20,000.
- R 2 is independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond.
- monovalent hydrocarbon groups other than the alkenyl group-containing organic group exemplified for R 1 include those mentioned above. Among these, a methyl group or a phenyl group is preferred, and a methyl group is particularly preferred.
- R 2 contains a hydroxyl group, the ratio of the number of hydroxyl groups to the total number of R 2 is preferably 10% or less, more preferably 0.001 to 5%, and more preferably 0.002 to 1%. .
- X is an alkenyl group-containing monovalent organic group having 2 to 10 carbon atoms, preferably 2 to 8 carbon atoms, and may contain an oxygen atom.
- the alkenyl group-containing organic groups exemplified for R 1 include those mentioned above. Among these, a vinyl group is preferred.
- b is an integer of 0 to 3, preferably 0 or 1, and more preferably 1.
- c is an integer of 0 or more, preferably 0 to 500, more preferably 0 to 100, even more preferably 0 to 50
- c' is an integer of 2 or more, preferably 2 to 500, and more It is preferably 2 to 100, more preferably 2 to 50.
- d is an integer of 100 or more, preferably 500 to 15,000, more preferably 1,000 to 13,500, and even more preferably 2,000 to 12,000.
- 2b+c is an integer of 2 or more, preferably from 2 to 500, more preferably from 2 to 100, even more preferably from 2 to 50.
- c+d is an integer of 100 to 20,000, preferably 500 to 15,000, more preferably 1,000 to 13,500, even more preferably 2,000 to 12,000, and c' +d is an integer from 100 to 20,000, preferably from 500 to 15,000, more preferably from 1,000 to 13,500, and still more preferably from 2,000 to 12,000.
- component (A) examples include, but are not limited to, the following.
- Me, Vi, and Ph in the following formula represent a methyl group, a vinyl group, and a phenyl group, respectively.
- the bonding order of each siloxane unit shown in parentheses is not limited to the following.
- the total number of repeating units of siloxane is an average value.
- (z1 is an integer in which the organopolysiloxane has the above-mentioned viscosity.
- z2 is an integer in which the organopolysiloxane has the above-mentioned viscosity.
- 100 ⁇ z2 ⁇ 20,000) (z3 and z4 are integers in which the organopolysiloxane has the above-mentioned viscosity.
- 100 ⁇ z3 ⁇ 19,000, 2 ⁇ z4 ⁇ 1,000, 102 ⁇ z3+z4 ⁇ 20,000) (z5 and z6 are integers in which the organopolysiloxane has the above-mentioned viscosity.
- 100 ⁇ z5 ⁇ 19,000, 2 ⁇ z6 ⁇ 1,000, 102 ⁇ z5+z6 ⁇ 20,000) (z7 and z8 are integers in which the organopolysiloxane has the above-mentioned viscosity.
- z9 and z10 are integers in which the organopolysiloxane has the above-mentioned viscosity.
- z11, z12 and z13 are integers in which the organopolysiloxane has the above-mentioned viscosity.
- z14, z15 and z16 are integers in which the organopolysiloxane has the above-mentioned viscosity.
- z14, z15 and z16 are integers in which the organopolysiloxane has the above-mentioned viscosity.
- the silicone composition of the present invention may further contain a linear organopolysiloxane (A') having no alkenyl group or SiH group.
- the organopolysiloxane (A') has a SiOH group, it can undergo a condensation reaction with the component (B) and component (B') described below.
- the content of component (A') is preferably 70% by mass or less, more preferably 50% by mass or less, even more preferably 40% by mass or less, based on the total mass of components (A) and (A'). It's good to have one. If it exceeds the above 70% by mass, the adhesive strength and holding power of the resulting adhesive layer may decrease.
- the lower limit of the component (A') may be 0% by mass.
- the content of component (A') is 1 to 70% by mass, more preferably 3 to 50% by mass, and even more preferably 5 to 40% by mass, so that the adhesive strength of the resulting adhesive layer is may be improved.
- the component (A') is represented by the following formula (1') or (1''), for example.
- R 1' is independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, provided that R 1' is not an alkenyl group-containing organic group, a' is an integer greater than or equal to 1.
- Component (A') may be any oil-like or raw rubber-like organopolysiloxane.
- the viscosity at 25° C. is preferably 1,000 mPa ⁇ s or more, more preferably 10,000 mPa ⁇ s or more, particularly preferably 50,000 mPa ⁇ s or more at 25°C.
- the viscosity of a solution dissolved in toluene to give a concentration of 30% by mass is preferably 1,000 to 200,000 mPa ⁇ s, more preferably 5,000 to 150,000 mPa ⁇ s, and further It is preferably 10,000 to 120,000 mPa ⁇ s, particularly preferably 15,000 to 100,000 mPa ⁇ s.
- a' is an integer of 1 or more, and any value is sufficient as long as the organopolysiloxane has the above-mentioned viscosity.
- a' is from 100 to 20,000, preferably from 500 to 15,000, more preferably from 1,000 to 13,500, even more preferably from 2,000 to 12,000.
- R 1' include those mentioned above as monovalent hydrocarbon groups other than the alkenyl group-containing organic group exemplified for R 1 . Among these, a methyl group or a phenyl group is preferred, and a methyl group is particularly preferred.
- the ratio of the number of hydroxyl groups to the total number of R 1' is preferably 10% or less, more preferably 0.001 to 5%, and more preferably 0.002 to 1%. Good.
- Component (B) has one or more alkenyl groups in one molecule, contains R 3 3 SiO 1/2 units and SiO 4/2 units, and has a ratio of R 3 3 SiO 1/2 units/SiO 4/
- the organopolysiloxane resin has a molar ratio of 2 units of 0.5 to 1.5, preferably 0.6 to 1.3, preferably 0.7 to 1.0. When the molar ratio is less than the above lower limit or exceeds the above upper limit, the adhesive strength and holding power of the resulting adhesive layer may decrease.
- the molar ratio of R 3 3 SiO 1/2 units/SiO 4/2 units can usually be determined by a known structural analysis method such as NMR analysis (the same applies hereinafter).
- the above component (B) may be used alone or in combination of two or more.
- R 3 are each independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms.
- alkyl groups preferably having 1 to 6 carbon atoms such as methyl group, ethyl group, propyl group, butyl group, cycloalkyl groups preferably having 5 to 8 carbon atoms such as cyclohexyl group, phenyl group, tolyl group, etc.
- aryl group having 6 to 10 carbon atoms is an aryl group having 6 to 10 carbon atoms, an aralkyl group preferably having 7 to 10 carbon atoms such as a benzyl group, an alkenyl group preferably having 2 to 8 carbon atoms such as a vinyl group, an allyl group, a hexenyl group, or a hydroxypropyl group.
- cyanoethyl group 3-chloropropyl group, 3,3,3-trifluoropropyl group, 3,3,4,4,5,5,6,6,6-nonafluorohexyl group, methoxypropyl group, ethoxypropyl group hydroxy group, cyano group, halogen atom, alkoxy group, alkoxysilyl group, polyoxyalkylene group, epoxy group,
- Examples include monovalent hydrocarbon groups having 1 to 10 carbon atoms substituted with a carboxyl group or the like. Among these, methyl group, phenyl group, and vinyl group are preferable, and methyl group and vinyl group are particularly preferable.
- the amount of alkenyl groups contained in component (B) is preferably 0.005 to 0.5 mol, more preferably 0.01 to 0.3 mol/100 g, and 0.02 to 0.2 mol per 100 g of organopolysiloxane. /100g is more preferable, and 0.05 to 0.16 mol/100g is even more preferable. If it is less than the above lower limit or exceeds the above upper limit, the adhesive strength and holding power of the resulting adhesive layer may decrease.
- Component (B) essentially has R 3 3 SiO 1/2 units and SiO 4/2 units. It may contain either or both of R 3 2 SiO 2/2 units and R 3 SiO 3/2 units (R 3 is as described above) within a range that does not impair the characteristics of the present invention. Preferably, it has R 3 2 SiO 2/2 units, and the molar ratio represented by (R 3 2 SiO 2/2 units)/(SiO 4/2 units) is 0.01 to 0.5, more preferably is preferably 0.02 to 0.4, more preferably 0.03 to 0.3, and even more preferably 0.05 to 0.25.
- an organopolysiloxane resin consisting of R 4 3 SiO 1/2 units, R 4 2 R 5 SiO 1/2 units, and SiO 4/2 units, or R 4 3 SiO 1/2 units, R 4 Organopolysiloxane resins consisting of R 5 SiO 2/2 units and SiO 4/2 units are preferred.
- R 4 is a group represented by R 3 above other than an alkenyl group, and R 5 is an alkenyl group having 2 to 10 carbon atoms.
- the molar ratio of each unit is SiO 4/2 units (hereinafter referred to as Q).
- the molar ratio M units/Q units of R 4 3 SiO 1/2 units and R 4 2 R 5 SiO 1/2 units (hereinafter collectively referred to as M units) is 0.5 to 1. 5, preferably 0.6 to 1.3, preferably 0.7 to 1.0.
- M unit R 4 3 SiO 1/2 unit
- D unit R 4 R 5 SiO 2/2 unit
- Q unit SiO 4/2 unit
- M unit/Q unit is 0.5 to 1.5, preferably 0.6 to 1.3, preferably 0.7 to 1.0
- D unit/Q unit is 0.01. -0.5, more preferably 0.02-0.4, more preferably 0.03-0.3, even more preferably 0.05-0.25.
- the molar ratio of M units/Q units and the molar ratio of D units/Q units can usually be determined by known structural analysis methods such as NMR analysis (the same applies hereinafter).
- Component (B) has a siloxane unit (silanol group-containing unit) having a hydroxyl group bonded to a silicon atom or a siloxane unit (alkoxy group-containing unit) having an alkoxy group having 1 to 6 carbon atoms bonded to a silicon atom. It's okay.
- the amount of silanol group-containing units is such that the hydroxyl group content is 0.005 to 0.3 mol/100 g of component (B), preferably 0.008 to 0.2 mol/100 g, and more preferably 0.01 to 0.1 mol/100 g. The amount is preferable.
- the amount of the alkoxy group-containing unit is such that the content of the alkoxy group is 0.3 mol/100 g or less of component (B), preferably 0.2 mol/100 g or less, and more preferably 0.1 mol/100 g or less. .
- the adhesive force and holding power of the resulting adhesive layer may decrease, or the curability may decrease.
- the above SiOH group content and alkoxy group content can usually be determined by a known structural analysis method such as NMR analysis (the same applies hereinafter).
- the total amount of the silanol group-containing units and the alkoxy group-containing units in component (B) is 0.008 to 0.3 mol/100g, and further 0.01
- the amount is preferably from 0.2 mol/100g, particularly preferably from 0.015 to 0.1 mol/100g.
- alkoxy group having 1 to 6 carbon atoms examples include methoxy group, ethoxy group, propoxy group, isopropoxy group, and phenoxy group.
- the silanol group-containing units include R 3 2 (OH)SiO 1/2 units, R 3 (OH) 2 SiO 1/2 units, R 3 (OH)SiO 2/2 units, (OH)SiO 3/ An example is 2 units.
- alkoxy group-containing units include R 3 2 (OR') SiO 1/2 unit, R 3 (OR') 2 SiO 1/2 unit, R 3 (OR') SiO 2/2 unit, (OR' ) SiO 3/2 units (OR' are each independently an alkoxy group having 1 to 6 carbon atoms, as exemplified above), and the like.
- component (B) consists of R 3 3 SiO 1/2 units, SiO 4/2 units, and optionally R 3 2 SiO 2/2 , the hydroxyl group or alkoxyl group is bonded to the silicon atom derived from the SiO 4/2 unit. can do.
- the weight average molecular weight of component (B) is preferably 1,000 to 10,000, more preferably 1,250 to 8,000, still more preferably 1,500 to 6,000, even more preferably 1,750 to 5,500. If it is less than the above lower limit or exceeds the above upper limit, the adhesive strength and holding power of the resulting adhesive layer may decrease.
- the weight average molecular weight can usually be determined as the weight average molecular weight in terms of polystyrene in gel permeation chromatography (GPC) analysis using toluene, tetrahydrofuran (THF), etc. as a developing solvent (the same applies hereinafter).
- the silicone adhesive composition of the present invention further contains no alkenyl group or SiH group, and contains R 3' 3 SiO 1/2 units and SiO 4/2 units, (R 3' 3 SiO 1/2 units) )/(SiO 4/2 units) molar ratio is from 0.5 to 1.5, preferably from 0.55 to 1.3, preferably from 0.6 to 1.0 (B') May contain.
- R 3' 3 SiO 1/2 units and SiO 4/2 units R 3' 3 SiO 1/2 units and SiO 4/2 units
- (R 3' 3 SiO 1/2 units) )/(SiO 4/2 units) molar ratio is from 0.5 to 1.5, preferably from 0.55 to 1.3, preferably from 0.6 to 1.0 (B') May contain.
- the molar ratio is less than the above lower limit or exceeds the above upper limit, the adhesive strength and holding power of the resulting adhesive layer may decrease.
- the above component (B') may be used alone or in combination of two or more.
- the organopolysiloxane resin (B') component that does not contain alkenyl groups can undergo a condensation reaction with the (A) component, the (B) component, and optionally the (A') component.
- the content of component (B') is preferably 50% by mass or less, more preferably 40% by mass or less, more preferably 30% by mass or less, based on the total mass of components (B) and (B'). More preferably, it is 25% by mass or less. If it exceeds the above 50% by mass, the adhesive strength and holding power of the resulting adhesive layer may decrease.
- the lower limit of component (B') may be 0% by mass.
- the content of component (B') is 1 to 50% by mass, more preferably 2 to 40% by mass, more preferably 3 to 30% by mass, and even more preferably 4 to 25% by mass. This may improve the adhesive strength of the resulting adhesive layer.
- R 3' are each independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond.
- the monovalent hydrocarbon groups other than the alkenyl group-containing organic group exemplified for R 3 include those mentioned above. Among these, a methyl group or a phenyl group is preferred, and a methyl group is particularly preferred.
- Component (B') essentially includes R 3' 3 SiO 1/2 units and SiO 4/2 units, but R 3' 2 SiO 2/2 units and It may have either one or both of R 3' SiO 3/2 units (R 3' is as described above).
- Component (B') has a siloxane unit (silanol group-containing unit) having a hydroxyl group bonded to a silicon atom or a siloxane unit (alkoxy group-containing unit) having an alkoxy group having 1 to 6 carbon atoms bonded to a silicon atom. You may.
- the amount of silanol group-containing units is such that the hydroxyl group content is 0.005 to 0.3 mol/100 g of component (B'), preferably 0.008 to 0.25 mol/100 g, and more preferably 0.01 to 0.2 mol/100 g. An amount of 100g is preferred.
- the amount of the alkoxy group-containing unit is such that the content of the alkoxy group is 0.3 mol/100 g or less of component (B'), preferably 0.2 mol/100 g or less, and more preferably 0.1 mol/100 g or less. preferable.
- the adhesive force and holding power of the resulting adhesive layer may decrease, or the curability may decrease.
- the total amount of the silanol group-containing unit and the alkoxy group-containing unit is 0.008 to 0.3 mol/100g in the component (B'), and further 0.008 to 0.3 mol/100 g, as the sum of the hydroxyl group content and the alkoxy group content.
- the amount is preferably from 0.01 to 0.25 mol/100g, particularly preferably from 0.02 to 0.2 mol/100g.
- alkoxy group having 1 to 6 carbon atoms examples include methoxy group, ethoxy group, propoxy group, isopropoxy group, and phenoxy group.
- silanol group-containing units include R 3' 2 (OH) SiO 1/2 units, R 3' (OH) 2 SiO 1/2 units, R 3' (OH) SiO 2/2 units, (OH) Examples include SiO 3/2 units.
- the alkoxy group-containing units include R 3' 2 (OR') SiO 1/2 units, R 3' (OR') 2 SiO 1/2 units, R 3' (OR') SiO 2/2 units, Examples include (OR')SiO 3/2 units (OR' each independently represents an alkoxy group having 1 to 6 carbon atoms, as exemplified above).
- component (B') consists of R 3' 3 SiO 1/2 units and SiO 4/2 units
- the hydroxyl group or alkoxyl group can be bonded to the silicon atom derived from the SiO 4/2 units.
- Component (B') preferably has a weight average molecular weight of 1,000 to 10,000, more preferably 1,250 to 8,000, still more preferably 1,500 to 7,000, even more preferably is 1,750 to 6,000.
- the ratio is preferably 60/40 to 22/78, more preferably 55/45 to 25/75, more preferably 50/50 to 30/70, and even more preferably 49/51 to 33/67.
- a part or all of component (A), component (B), and optional components (A') and (B') may be subjected to a condensation reaction in advance.
- a condensation reaction product obtained by subjecting the hydroxyl group of component (A) and the alkoxy group or hydroxyl group of component (B) to a hydrolytic condensation reaction or a condensation reaction may be mixed with the other components.
- a condensation reaction product obtained by subjecting the hydroxyl group of component (A) and the alkoxy group or hydroxyl group of component (B') to a hydrolytic condensation reaction or a condensation reaction may be mixed with other components.
- a condensation reaction product obtained by subjecting the hydroxyl group of component (A') and the alkoxy group or hydroxyl group of component (B) to a hydrolytic condensation reaction or a condensation reaction may be mixed with other components.
- a condensation reaction product obtained by subjecting the hydroxyl group of component (A') and the alkoxy group or hydroxyl group of component (B') to a hydrolytic condensation reaction or a condensation reaction may be mixed with other components.
- a condensation reaction product obtained by subjecting the hydroxyl group of component (A), the hydroxyl group of component (A'), the alkoxy group or hydroxyl group of component (B) to a hydrolytic condensation reaction or a condensation reaction in advance can be used with other components. They may be mixed.
- the hydroxyl group of component (A), the hydroxyl group of component (A'), the alkoxy group or hydroxyl group of component (B') are subjected to a hydrolytic condensation reaction or a condensation reaction in advance to form a condensation reaction product, which is used as other components. It may be mixed with Alternatively, the hydroxyl group of component (A), the alkoxy group or hydroxyl group of component (B), and the alkoxy group or hydroxyl group of component (B') are previously subjected to a hydrolytic condensation reaction or a condensation reaction to produce a condensation reaction product. It may be mixed with other components.
- the hydroxyl group of component (A'), the alkoxy group or hydroxyl group of component (B), and the alkoxy group or hydroxyl group of component (B') are subjected to a hydrolysis condensation reaction or a condensation reaction in advance to obtain a condensation reaction product. It may be mixed with other ingredients.
- the hydroxyl group of component (A), the hydroxyl group of component (A'), the alkoxy group or hydroxyl group of component (B), and the alkoxy group or hydroxyl group of component (B') are subjected to a hydrolytic condensation reaction or condensation reaction in advance.
- the reaction product may be mixed with other components.
- a mixture of component (A) and/or component (A') and component (B) and/or component (B') dissolved in a solvent such as toluene is mixed with an acid, a base, or an organic acid.
- the reaction may be carried out using one or more types of condensation catalysts such as metal salts at room temperature (25° C.) or under heating, and neutralization may be performed as necessary.
- condensation catalysts such as metal salts at room temperature (25° C.) or under heating, and neutralization may be performed as necessary.
- the silicone pressure-sensitive adhesive composition of the present invention includes a product obtained by condensing the component (A) and/or component (A') with the component (B) and/or component (B'), as described below.
- the composition may include component (C) and component (D).
- the basic condensation catalyst used in the above reaction includes metal hydroxides such as lithium hydroxide, sodium hydroxide, potassium hydroxide, and calcium hydroxide; carbonates such as sodium carbonate and potassium carbonate; and sodium hydrogen carbonate.
- hydrogen carbonates such as potassium hydrogen carbonate
- metal alkoxides such as sodium methoxide and potassium butoxide
- organic metals such as butyl lithium; potassium silanolate
- ammonia gas aqueous ammonia, methylamine, ethylamine, propylamine, hexylamine, butanol Amine, butylamine, dimethylamine, diethylamine, diethanolamine, dipropylamine, dibutylamine, dihexylamine, ethylamylamine, imidazole, propylhexylamine, trimethylamine, triethylamine, tripropylamine, tripropanolamine, pyridine, N-methylimidazole, Nitrogen compounds such as methylpropyl
- the temperature of the condensation reaction can be 10 to 150°C, but it is usually carried out at room temperature (25°C) to the reflux temperature of the organic solvent.
- the reaction time is not particularly limited, but may be 0.5 to 20 hours, preferably 1 to 16 hours.
- a neutralizing agent that neutralizes the basic catalyst may be added as necessary.
- the neutralizing agent include acidic gases such as hydrogen chloride and carbon dioxide; organic acids such as acetic acid, octylic acid, and citric acid; and mineral acids such as hydrochloric acid, sulfuric acid, and phosphoric acid.
- an inert gas such as nitrogen may be passed through and distilled off.
- Component (C) is an organohydrogenpolysiloxane having three or more hydrogen atoms (SiH groups) bonded to silicon atoms in one molecule.
- the organohydrogenpolysiloxane (C) may be used alone or in combination of two or more.
- the ratio of the total number of hydrogen atoms bonded to silicon atoms to the total number of hydrogen atoms bonded to silicon atoms and groups bonded to silicon atoms is 20% to 50%.
- the average degree of siloxane polymerization of the component (C) is 100 or less, preferably from 3 to 100, more preferably from 4 to 70, more preferably from 5 to 50, even more preferably from 6 to 30.
- the SiH group in the component (C) and the alkenyl groups in the components (A) and (B) are added and cured to form an adhesive layer.
- the blending amount of component (C) is such that the ratio of the total number of SiH groups in component (C) to the total number of alkenyl groups in components (A) and (B) is 0.1 to 2.0, preferably The amount is 0.12 to 1.5, more preferably 0.15 to 0.95, even more preferably 0.2 to 0.8, and even more preferably 0.3 to 0.7.
- 0.1 to 10.0 parts by mass preferably 0.5 to 10.0 parts by mass based on 100 parts by mass of the total of components (A) and (B), and optional components (A') and (B').
- the amount is 7.0 parts by weight, more preferably 1.0 to 5.0 parts by weight. If the above-mentioned blending amount or number ratio is less than the above-mentioned lower limit, the adhesive strength and holding power of the resulting adhesive layer may decrease. Moreover, when the above upper limit is exceeded, the adhesive strength of the resulting adhesive layer may be reduced, and the usable time of the treatment bath may be shortened.
- Component (C) may be linear, branched, or cyclic, or may be a mixture thereof.
- the component (C) includes, for example, at least one of R 6 2 HSiO 1/2 units, R 6 HSiO 2/2 units, and HSiO 3/2 units, and optionally further R 6 3 SiO 1/2 Examples include polymers or copolymers comprising at least one of R 6 2 SiO 2/2 units, R 6 SiO 3/2 units, and SiO 4/2 units, where R 6 independently of each other , a hydroxyl group, or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond).
- the total number of R 6 2 HSiO 1/2 units or R 6 HSiO 2/2 units in one molecule is 3 to 100, preferably 4 to 70, more preferably 5 to 50, even more preferably 6 to 30. Preferably, it is something that is owned individually.
- the number of SiH groups is less than the above lower limit or exceeds the above upper limit, the curability may be reduced, and the adhesive strength and holding power of the resulting adhesive layer may be reduced.
- the ratio of the total number of hydrogen atoms bonded to silicon atoms to the total number of hydrogen atoms bonded to silicon atoms and groups R6 bonded to silicon atoms is 20 to 50%. , preferably 25 to 49%, more preferably 30 to 48%. If the proportion of SiH groups is less than the above lower limit or exceeds the above upper limit, the curability may be reduced, or the adhesive strength and holding power of the resulting adhesive layer may be reduced.
- R 6 are each independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond.
- monovalent hydrocarbon groups include alkyl groups preferably having 1 to 6 carbon atoms such as methyl group, ethyl group, propyl group, butyl group, cycloalkyl groups preferably having 5 to 8 carbon atoms such as cyclohexyl group, and phenyl group.
- an aryl group preferably having 6 to 10 carbon atoms such as tolyl group
- an aralkyl group preferably having 7 to 10 carbon atoms such as benzyl group, hydroxypropyl group, cyanoethyl group, 3-chloropropyl group, 3,3,3 - Bonded to carbon atoms such as trifluoropropyl group, 3,3,4,4,5,5,6,6,6-nonafluorohexyl group, methoxypropyl group, ethoxypropyl group, ⁇ -glycidoxypropyl group, etc.
- R 6 is preferably an alkyl group or an aryl group, and more preferably a methyl group, an ethyl group, a propyl group, or a phenyl group.
- R 6 may be a hydroxyl group, but the ratio of the number of hydroxyl groups to the total number of R 6 is preferably 10% or less, more preferably 5% or less, and even more preferably 1% or less. Although the lower limit is not limited, the smaller the amount of hydroxyl groups in component (C), the better, and it is not necessary to contain hydroxyl groups.
- Component (C) preferably has a viscosity of 1 to 2,000 mPa ⁇ s, particularly 2 to 1,000 mPa ⁇ s at 25°C. If the viscosity is less than the above lower limit or exceeds the above upper limit, the curability may be reduced, or the adhesive strength or holding power of the resulting adhesive layer may be reduced.
- Component (C) is preferably a linear organohydrogenpolysiloxane represented by the following formula (4).
- R 6 is independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond.
- e is 0 or 1;
- f and g are integers satisfying 1 ⁇ f ⁇ 98, 0 ⁇ g ⁇ 60, 3 ⁇ 2e+f ⁇ 100, and 3 ⁇ f+g+2 ⁇ 100).
- R 6 is independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, which does not have a hydroxyl group or an aliphatic unsaturated bond, and as described above, It is.
- R 6 is preferably an alkyl group or an aryl group, and more preferably a methyl group, an ethyl group, a propyl group, or a phenyl group.
- R 6 may be a hydroxyl group, but the ratio of the number of hydroxyl groups to the total number of R 6 is preferably 10% or less, more preferably 5% or less, and even more preferably 1% or less. It is better.
- the lower limit is not limited, the smaller the amount of hydroxyl groups, the better, and it is not necessary to contain hydroxyl groups.
- f is an integer of 1 to 98, preferably 3 to 80, more preferably 4 to 70, more preferably 5 to 50, and even more preferably 6 to 30. It is. g is an integer from 0 to 60, preferably from 0 to 30, more preferably from 0 to 20, and even more preferably from 0 to 10. 2e+f is an integer from 3 to 100, preferably from 4 to 70, more preferably from 5 to 50, still more preferably from 6 to 30. f+g+2 is an integer from 3 to 100, preferably from 4 to 70, more preferably from 5 to 50, even more preferably from 6 to 30.
- crosslinking proceeds through a hydrosilylation reaction of component (A), component (B), and component (C).
- component (C) has a low degree of polymerization and a high proportion of SiH groups.
- the ratio of the total number of SiH groups in (C) to the total number of alkenyl groups in (A) and (B) is 0.1 to 2.0, preferably 0.12 to 1.5, more preferably 0. .15 to 0.95, more preferably 0.2 to 0.8, more preferably 0.3 to 0.7.
- the ratio of SiH groups to alkenyl groups is smaller than that of ordinary addition-curing silicone adhesives. This results in a state in which the silicone adhesive layer cannot be uniformly crosslinked.
- a three-dimensional crosslinked structure is formed by some of the components (A), (B), and (C). Further, some of the components (B) and (C) react to form a high molecular weight organopolysiloxane in which a plurality of components (B) react with one molecule of the component (C). Furthermore, since the ratio of SiH groups to alkenyl groups is small, a portion of component (A) and component (B) remain unreacted. That is, an adhesive layer is formed which is a mixture of a three-dimensional crosslinked structure, a high molecular weight organopolysiloxane structure, and unreacted components (A) and (B). It is presumed that this allows the high adhesion and holding power at room temperature to be maintained even at high temperatures.
- component (C) examples include, but are not limited to, the following.
- Me and Ph in the following formula represent a methyl group and a phenyl group, respectively.
- the bonding order of each siloxane unit shown in parentheses is not limited to the following. In each formula below, the total number of repeating units of siloxane is an average value.
- the silicone composition of the present invention further has three or more silicon-bonded hydrogen atoms (SiH groups) in one molecule, and the total number of silicon-bonded hydrogen atoms and silicon-bonded groups of the component is It may contain organohydrogenpolysiloxane (C') in which the ratio of the total number of hydrogen atoms bonded to silicon atoms to the total number of hydrogen atoms is less than 20%.
- the average degree of siloxane polymerization of the component (C') is preferably 100 or less, preferably 3 to 100, more preferably 4 to 70, more preferably 5 to 50, even more preferably 6 to 30.
- the organohydrogenpolysiloxane (C') may be used alone or in combination of two or more.
- the SiH group in the component (C') and the alkenyl groups in the components (A) and (B) are added and cured to form an adhesive layer.
- the blending amount of component (C') is such that the ratio of the total number of SiH groups in component (C') to the total number of alkenyl groups in components (A) and (B) is 1.0 or less, preferably 0.
- the amount is .8 or less, more preferably 0.6 or less. If it exceeds the above 1.0, the adhesive strength of the resulting adhesive layer may be reduced, or the usable time of the treatment bath may be shortened.
- the lower limit value of the amount of component (C') may be 0.
- the ratio of the total number of SiH groups in component (C') to the total number of alkenyl groups in component (A) and component (B) is preferably 0.01 to 1.0, more preferably 0.01 to 1.0.
- the ratio By setting the ratio to 0.03 to 0.8, more preferably 0.05 to 0.6, the curability may be improved, and the adhesive strength and holding power of the resulting adhesive layer may be improved.
- Component (C') may be linear, branched, or cyclic, or may be a mixture thereof.
- the component (C') includes, for example, at least one of R 6' 2 HSiO 1/2 units, R 6' HSiO 2/2 units, and HSiO 3/2 units, and optionally further R 6' 3 Examples include polymers or copolymers comprising at least one of SiO 1/2 units, R 6' 2 SiO 2/2 units, R 6' SiO 3/2 units, and SiO 4/2 units (wherein R 6' are each independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond).
- One molecule has a total of 3 to 50, preferably 4 to 45, and more preferably 5 to 40 R 6' 2 HSiO 1/2 units or R 6' HSiO 2/2 units in total.
- the ratio of the total number of hydrogen atoms bonded to silicon atoms to the total number of hydrogen atoms bonded to silicon atoms and groups R6 ' bonded to silicon atoms (hereinafter referred to as the ratio of SiH groups) is It is less than 20%, preferably 1% or more and less than 20%, more preferably 5% or more and less than 20%, and even more preferably 10 or more and less than 20%.
- R 6' are each independently a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms and having no aliphatic unsaturated bond.
- the monovalent hydrocarbon groups exemplified for R 6 include those mentioned above. Among these, a methyl group or a phenyl group is preferred, and a methyl group is particularly preferred.
- R 6' may be a hydroxyl group, but the ratio of the number of hydroxyl groups to the total number of R 6's is preferably 10% or less, more preferably 5% or less, and even more preferably 1% or less. Although the lower limit is not limited, the smaller the amount of hydroxyl groups in component (C'), the better, and it is not necessary to contain hydroxyl groups.
- Component (C') preferably has a viscosity of 1 to 2,000 mPa ⁇ s, particularly 2 to 1,000 mPa ⁇ s at 25°C.
- Component (C') is preferably a linear organohydrogenpolysiloxane represented by the following formula (4').
- R 6' is independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, which does not have a hydroxyl group or an aliphatic unsaturated bond.
- e ' is 0 or 1
- f ' and g ' are integers of 1 ⁇ f ' ⁇ 50, 1 ⁇ g ' ⁇ 80, 3 ⁇ 2e ' +f ' ⁇ 50, and 3 ⁇ f ' +g ' +2 ⁇ 100).
- R 6' independently represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, which does not have a hydroxyl group or an aliphatic unsaturated bond; It is as follows.
- f ' is an integer from 1 to 50, preferably from 2 to 45, and more preferably from 3 to 40.
- g ' is an integer from 1 to 80, preferably from 2 to 70, more preferably from 3 to 60.
- 2e ′ +f ′ is an integer from 3 to 50, preferably from 4 to 45, more preferably from 5 to 40.
- f ' +g ' +2 is an integer from 3 to 100, preferably from 4 to 80, more preferably from 5 to 60.
- Component (D) is a catalyst for promoting the addition reaction of component (A) and component (B) with component (C) and optional (C'). Any catalyst may be used as long as it promotes the so-called hydrosilylation reaction, and known platinum group metal catalysts can be used. Examples of platinum group metal catalysts include platinum-based, palladium-based, rhodium-based, ruthenium-based, and iridium-based catalysts, and among these, platinum-based catalysts are particularly preferably used.
- platinum-based catalyst examples include chloroplatinic acid, an alcoholic or aldehyde solution of chloroplatinic acid, a reaction product of chloroplatinic acid and alcohol, and a complex of chloroplatinic acid or platinum with various olefins or vinyl siloxanes. It will be done.
- (D) component may be used individually by 1 type, or may use 2 or more types together.
- the blending amount of component (D) may be a catalytic amount.
- the catalytic amount is an effective amount that promotes the addition reaction with component (A), component (B), component (C), and optionally (C').
- the mass of the platinum group metal In terms of conversion, it is 1 to 5,000 ppm, preferably 5 to 500 ppm, particularly preferably 10 to 200 ppm. If it is less than 1 ppm, the curability may decrease, the crosslinking density of the resulting adhesive layer may decrease, and the adhesive strength and holding power may decrease. If it exceeds 5,000 ppm, the usable time of the treatment bath may be shortened.
- Component (E) is an addition reaction control agent and is an optional component. Before heat curing, for example, when preparing the silicone adhesive composition or applying the adhesive composition to a substrate, prevent the treatment liquid containing the adhesive composition from thickening or gelling. It can be added for. Examples include various organic nitrogen compounds, organic phosphorus compounds, organic silicon compounds, acetylene compounds, unsaturated carboxylic acid esters, and oxime compounds.
- the blending amount of component (E) is 0 to 8.0 parts per 100 parts by mass of (A), (B), (C) and optional (A'), (B'), and (C').
- the amount is preferably in the range of 0.01 to 8.0 parts by weight, and more preferably in the range of 0.05 to 5.0 parts by weight when blended. If the blending amount exceeds 8 parts by mass, the curability of the resulting composition may decrease. When the amount is 0.01 parts by mass or more, the reaction control effect is sufficiently exhibited.
- non-reactive organopolysiloxanes such as polydimethylsiloxane and polydimethyldiphenylsiloxane; antioxidants such as phenol-based, quinone-based, amine-based, phosphorus-based, phosphite-based, sulfur-based, and thioether-based antioxidants; triazole-based, Light stabilizers such as benzophenone; flame retardants such as phosphate esters, halogens, phosphorus, and antimony; antistatic agents such as cationic activators, anionic activators, and nonionic activators; dyes; pigments; Foaming agents; fillers; leveling agents; adhesion improvers such as silane coupling agents; thickeners; photopolymerization initiators; reactive diluents and solvents for lowering viscosity during coating.
- antioxidants such as phenol-based, quinone-based, amine-based, phosphorus-based, phosphite-based, sulfur
- solvents examples include aromatic hydrocarbon solvents such as toluene and xylene, aliphatic hydrocarbon solvents such as hexane, heptane, octane, isooctane, decane, cyclohexane, methylcyclohexane, and isoparaffin, industrial gasoline, petroleum benzine, and solvent naphtha.
- aromatic hydrocarbon solvents such as toluene and xylene
- aliphatic hydrocarbon solvents such as hexane, heptane, octane, isooctane, decane, cyclohexane, methylcyclohexane, and isoparaffin
- Hydrocarbon solvents such as acetone, methyl ethyl ketone, 2-pentanone, 3-pentanone, 2-hexanone, 2-heptanone, 4-heptanone, methyl isobutyl ketone, diisobutyl ketone, acetonyl acetone, cyclohexanone and other ketone solvents, acetic acid Ester solvents such as ethyl, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate; ether solvents such as diethyl ether, dipropyl ether, diisopropyl ether, dibutyl ether, 1,2-dimethoxyethane, 1,4-dioxane; Solvents with ester and ether moieties such as 2-methoxyethyl acetate, 2-ethoxyethyl acetate, propylene glycol monomethyl ether acetate, 2-but
- the amount is based on the total of 100 parts by mass of components (A), (B), and (C), and optional (A'), (B'), and (C'). , preferably 10 to 20,000 parts by weight, more preferably 25 to 10,000 parts by weight, and particularly preferably 50 to 1,000 parts by weight.
- the silicone adhesive composition of the present invention can also be made into a solvent-free type.
- the silicone adhesive composition of the present invention can be prepared by mixing and dissolving the above-mentioned components.
- the preparation method includes (A), (B), and (C) components, optional (A'), (B'), and (C') components, optionally (E) component, and other optional components.
- the (A) component and/or any (A') component and (B) component and/or any (B') may be subjected to a condensation reaction in advance.
- a silicone adhesive layer can be obtained by applying the silicone adhesive composition of the present invention to various base materials and curing it under predetermined conditions.
- the silicone adhesive composition of the present invention is suitable for use as, for example, an adhesive tape, adhesive sheet, or adhesive film having a base material and an adhesive layer made of a cured product of the composition laminated on at least one side of the base material. Can be used.
- base material paper, plastic film, glass, metal, cloth, etc. are selected.
- paper include high-quality paper, coated paper, art paper, glassine paper, polyethylene laminate paper, kraft paper, Japanese paper, synthetic paper, and the like.
- Plastic films include polyethylene film, polypropylene film, polyester film, polyimide film, polyamide film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, polycarbonate film, polytetrafluoroethylene film, polystyrene film, and ethylene-vinyl acetate.
- Examples include copolymer film, ethylene-vinyl alcohol copolymer film, triacetyl cellulose film, polyetheretherketone film, polyphenylene sulfide film, and the like.
- thickness or type of glass and glass that has been chemically strengthened may be used.
- glass fibers can also be used, and glass fibers may be used alone or in combination with other resins.
- the cloth include natural fiber cloth, synthetic fiber cloth, and artificial leather
- examples of the metal include aluminum foil, copper foil, gold foil, silver foil, and nickel foil.
- the base materials may be subjected to primer treatment, corona treatment, etching treatment, sandblasting treatment, or plasma treatment.
- the surface of the substrate opposite to the adhesive layer may be subjected to surface treatments such as scratch prevention, stain prevention, fingerprint prevention, antiglare, antireflection, and antistatic properties.
- surface treatments such as scratch prevention, stain prevention, fingerprint prevention, antiglare, antireflection, and antistatic properties.
- the above-mentioned surface treatments may be applied after applying the adhesive layer to the base material, or the adhesive layer may be applied after the surface treatment.
- Examples of the scratch prevention treatment include treatment with hard coat agents such as acrylate type, silicone type, oxetane type, inorganic type, and organic-inorganic hybrid type.
- antifouling treatments include treatments with antifouling agents such as fluorine-based, silicone-based, ceramic-based, and photocatalyst-based agents.
- antireflection treatment examples include wet treatment by coating with a fluorine-based or silicone-based antireflection agent, and dry treatment by vapor deposition or sputtering.
- antistatic treatment examples include treatment with antistatic agents such as surfactant-based, silicone-based, organic boron-based, conductive polymer-based, metal oxide-based, and vapor-deposited metal-based antistatic agents.
- Coating can be done using any known coating method, including comma coater, lip coater, roll coater, die coater, knife coater, blade coater, rod coater, bar coater, kiss coater, gravure coater, and screen coater. Examples include coating, dip coating, and cast coating.
- the coating amount is appropriately set depending on the application, but it is usually an amount that gives the silicone adhesive layer a thickness of 1 to 2,000 ⁇ m, preferably 2 to 1,000 ⁇ m, particularly 3 to 500 ⁇ m after curing.
- the curing conditions for the silicone adhesive composition may be 70 to 250°C for 10 seconds to 10 minutes, but are not limited to this.
- the adhesive tape or adhesive film of the present invention may be manufactured by directly coating the silicone adhesive composition of the present invention on a substrate as described above and curing it to form a silicone adhesive layer, or by peeling it off.
- the composition may be applied to a coated release film or release paper, cured to form a silicone adhesive layer, and then the silicone adhesive layer may be produced by a transfer method that is bonded to the above-mentioned base material.
- Adhesive tapes or adhesive films produced using the silicone adhesive composition of the present invention are useful for applications in which they are used in high-temperature environments, but are not particularly limited. Examples include heat-resistant tape, electrical insulation tape, heat-sealing tape, plated masking tape, and masking tape for heat treatment. Specific applications include protection of adherends, masking, temporary fixing, fixing during transportation, splicing, etc. in the manufacturing process of electronic components and semiconductor components. Examples of adherends include, but are not limited to, metals such as stainless steel, copper, and iron; metals whose surfaces have been plated or rust-proofed; glass, tempered or antifouling glass, ceramics, etc. Examples include ceramics; resins such as polytetrafluoroethylene, polyimide, epoxy resins, novolac resins, and polarizing plates; and composites formed by combining a plurality of these materials.
- a toluene solution (115 parts by mass) and (E-1) ethynylcyclohexanol (0.2 parts by mass) were mixed, toluene (42.5 parts by mass) was added, and a silicone adhesive containing about 50% by mass of active ingredients was prepared.
- a base composition II was obtained.
- a toluene solution (129 parts by mass) and (E-1) ethynylcyclohexanol (0.2 parts by mass) were mixed, toluene (35.5 parts by mass) was added, and a silicone adhesive containing about 50% by mass of active ingredients was prepared.
- a base composition III was obtained.
- Organopolysiloxane represented by the following formula having an alkenyl group content (22.5 parts by mass), (z56 and z57 are numbers that satisfy the above viscosity and vinyl base weight) (A'-1)
- z56 and z57 are numbers that satisfy the above viscosity and vinyl base weight
- A'-1 When dissolved in toluene to a concentration of 30% by mass, the viscosity at 25°C is 70,000 mPa ⁇ s, both ends of the molecular chain are blocked with SiOH groups, and it has an alkenyl group.
- Organopolysiloxane (20 parts by mass) represented by the following formula, (z58 is a number that satisfies the above viscosity) 50% by mass toluene of the organopolysiloxane (B-1) described in Preparation Example 1 above, which is composed of Me 3 SiO 1/2 units, MeViSiO 2/2 units, and SiO 4/2 units and has a hydroxyl group bonded to a silicon atom.
- the solution (115 parts by mass) and (E-1) ethynylcyclohexanol (0.2 parts by mass) were mixed, toluene (42.5 parts by mass) was added, and a silicone adhesive base containing about 50% by mass of active ingredients was prepared.
- Composition V was obtained.
- a toluene solution 25 parts by mass
- a base composition VI was obtained.
- ⁇ Preparation example 12 for comparative example> (A-1) organopolysiloxane (45 parts by mass), which is described in Preparation Example 1 above, with both molecular chain ends capped with vinyl groups and having an alkenyl group content of 0.0008 mol/100 g; A 50% by mass toluene solution (110 parts by mass) of the organopolysiloxane described in Preparation Example 6 (B'-1) consisting of Me 3 SiO 1/2 units and SiO 4/2 units and having a hydroxyl group bonded to a silicon atom. ), and (E-1) ethynylcyclohexanol (0.2 parts by mass) were mixed, and toluene (45 parts by mass) was added to obtain silicone adhesive base composition 10II containing about 50% by mass of active ingredients.
- ⁇ Preparation example 13 for comparative example> (A-1) organopolysiloxane (36 parts by mass), which is described in Preparation Example 1 above, with both molecular chain ends capped with vinyl groups and having an alkenyl group content of 0.0008 mol/100 g; A 50% by mass toluene solution (128 parts by mass) of the organopolysiloxane described in Preparation Example 11 (B'-3) consisting of Me 3 SiO 1/2 units and SiO 4/2 units and having a hydroxyl group bonded to a silicon atom. ), and (E-1) ethynylcyclohexanol (0.2 parts by mass) were mixed, and toluene (36 parts by mass) was added to obtain silicone adhesive base composition 10III containing about 50% by mass of active ingredients.
- Organopolysiloxane represented by the following formula having an alkenyl group weight of /100g (42.5 parts by mass), (z59 and z60 are numbers that satisfy the above viscosity and vinyl base weight) 50% by mass of the organopolysiloxane (B-1) described in Preparation Example 1 above, which is composed of Me 3 SiO 1/2 units, MeViSiO 2/2 units, and SiO 4/2 units and has a hydroxyl group bonded to a silicon atom.
- a toluene solution (115 parts by mass) and (E-1) ethynylcyclohexanol (0.2 parts by mass) were mixed, toluene (42.5 parts by mass) was added, and a silicone adhesive containing about 50% by mass of active ingredients was prepared.
- a base composition XIV was obtained.
- ⁇ Preparation example 15 for comparative example> (A'-1) organopolysiloxane described in Preparation Example 5 above, in which both ends of the molecular chain are blocked with SiOH groups and does not have alkenyl groups (45 parts by mass); A 50% by mass toluene solution (110 parts by mass) of the organopolysiloxane described in Preparation Example 6 (B'-1) consisting of Me 3 SiO 1/2 units and SiO 4/2 units and having a hydroxyl group bonded to a silicon atom. ), A solution consisting of toluene (45 parts by mass) and aqueous ammonia (0.5 parts by mass) was stirred at room temperature (25° C.) for 12 hours to cause a condensation reaction.
- silicone adhesive base composition XV silicone adhesive base composition XV.
- (C) component, (D) component, and other components used in Examples and Comparative Examples are as follows.
- This silicone adhesive composition was applied to a polyimide film with a thickness of 25 ⁇ m and a width of 25 mm using an applicator so that the thickness of the adhesive layer after curing was 40 ⁇ m, and then heated at 130°C for 1 minute. This was then cured to produce an adhesive tape.
- the adhesive strength, adhesive strength during heating, and holding power of the obtained adhesive tape were measured by the following methods. The results are shown in Tables 1 to 5.
- Adhesive force An adhesive tape was attached to a stainless steel plate, and a 2 kg roller coated with a rubber layer was moved back and forth once to compress the tape. The mixture was left at room temperature (25° C., 50% RH) for about 20 hours. Thereafter, the average force (N/25 mm) required to peel the adhesive tape from the stainless steel plate at a speed of 300 mm/min at an angle of 180 degrees was measured using a tensile tester at room temperature.
- Adhesive strength during heating An adhesive tape was attached to a stainless steel plate, and a 2 kg roller coated with a rubber layer was moved back and forth once to compress the tape. The mixture was left at room temperature (25° C., 50% RH) for about 20 hours. Then, using a tensile tester equipped with a constant temperature bath, the average force required to peel the adhesive tape from the stainless steel plate in a 180° angle direction at a speed of 300 mm/min (N/25 mm) was measured in an atmosphere of 180°C. ) was measured.
- the compositions of Comparative Examples 1 to 3 contained alkenyl of component (A). Since the ratio of the number of SiH groups in component (C) to the number of groups is 0.48 to 1.51 and component (B) is not included, the crosslinking density is insufficient and cohesive failure occurs, making it impossible to peel off cleanly. There wasn't.
- the adhesive force at room temperature was 4.9 N/25 mm, while the adhesive force during heating at 180 ° C. was 2.1 N/25 mm, less than half. It has declined to .
- the adhesive force at room temperature was 9.2 N/25 mm, but the adhesive force during heating at 180° C. was significantly reduced to 1.6 N/25 mm.
- the crosslinking density became too high, the adhesive layer became hard and the adhesive strength decreased.
- the adhesive strength of the cured product obtained from the composition of Comparative Example 8 was greatly reduced.
- compositions of Comparative Examples 9 and 10 in which the ratio of the number of SiH groups in component (C) to the total number of alkenyl groups in components (A) and (B), is greater than 2.0 have a high crosslinking density.
- the adhesive layer became too hard and the adhesive strength decreased.
- the cured product obtained from the composition of Comparative Example 11 in which component (C-3) and rare earth carboxylate (F-1) were added to a peroxide-curing adhesive had an adhesive strength of 6 at room temperature.
- the adhesive strength during heating at 180° C. was reduced to 1.9 N/25 mm, which was less than half of that of .5 N/25 mm.
- Tables 1 to 3 the adhesive tape made of the silicone adhesive composition of the present invention maintains high adhesive strength at room temperature even during heating to 180°C, and the decrease in adhesive strength is small. Furthermore, the holding power during heating is also good.
- An adhesive tape or adhesive film having an adhesive layer formed by curing the silicone adhesive composition of the present invention can maintain high adhesive strength and holding power even at high temperatures exceeding 150°C. Therefore, this adhesive tape or adhesive film can be suitably used as a masking tape, a temporary fixing tape, or a heat seal tape in the manufacturing process of electronic components and semiconductor components.
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Abstract
Description
また、特許文献2では耐反発性試験での粘着テープが剥がれる距離を測定しているのみであり、特許文献3では粘着テープに荷重をかけた際のせん断方向のずれ量や90°方向の剥離量を測定しているのみである。いずれも高温下で粘着テープが剥がれにくいことを示しているが、室温での強い粘着力を高温下でも維持しているとは言えない。
(A)1分子中に2個以上のアルケニル基を有し、アルケニル基含有量が0.0001~0.03mol/100gである、直鎖状オルガノポリシロキサン:20~65質量部
(B)1分子中に1個以上のアルケニル基を有し、さらにR3 3SiO1/2単位及びSiO4/2単位を有し、(R3 3SiO1/2単位)/(SiO4/2単位)で表されるモル比が0.5~1.5であるオルガノポリシロキサン樹脂(式中、R3は、互いに独立に、置換又は非置換の、炭素原子数1~10の1価炭化水素基である):35~80質量部
(但し、上記(A)及び(B)成分の合計は100質量部である)
(C)ケイ素原子に結合する水素原子を1分子中に3個以上有し、該(C)成分中、ケイ素原子に結合する水素原子及びケイ素原子に結合する基の合計個数に対するケイ素原子に結合する水素原子の合計個数の割合が20%~50%であり、シロキサン平均重合度が100以下であるオルガノハイドロジェンポリシロキサン:上記(A)成分及び(B)成分中のアルケニル基の合計個数に対する該(C)成分中のSiH基の合計個数の比が0.1~2.0である量、及び
(D)白金族金属系触媒:触媒量。
[1] 前記(B)成分が、アルケニル基を0.005~0.5mol/100gの量で有する、前記シリコーン粘着剤組成物。
[2](A)成分及び(B)成分中のアルケニル基の合計個数に対する、(C)成分中のSiH基の合計個数の比が、0.15~0.95である、前記シリコーン粘着剤組成物。
[3](A)成分が下記式(1)で表される、前記シリコーン粘着剤組成物
[4](C)成分が下記式(4)で表される、前記シリコーン粘着剤組成物
[5](B)成分が、さらにR4R5SiO2/2単位を有し(式中、R4はアルケニル基以外の上記R3で示される基であり、R5は炭素数2~10のアルケニル基である)、(R4R5SiO2/2単位)/(SiO4/2単位)で表されるモル比0.01~0.5を有するオルガノポリシロキサン樹脂である、前記シリコーン粘着剤組成物。
好ましくは、基材と、該基材の少なくとも片面に形成された粘着層とを備える粘着テープであって、該粘着層が上記硬化物である、前記粘着テープを提供する。別の態様として好ましくは、基材と、該基材の少なくとも片面に形成された粘着層とを備える粘着フィルムであって、該粘着層が上記硬化物である、前記粘着フィルムを提供する。
(A)成分は、1分子中に2個以上のアルケニル基を有する、直鎖状のオルガノポリシロキサンである。(A)成分は、1分子中に2個以上のアルケニル基を有する直鎖状オルガノポリシロキサンであればよく、1種単独であっても2種以上を併用してもよい。
(B)成分は、1分子中に1個以上のアルケニル基を有し、R3 3SiO1/2単位及びSiO4/2単位を含有し、R3 3SiO1/2単位/SiO4/2単位のモル比が0.5~1.5、好ましくは0.6~1.3、好ましくは0.7~1.0であるオルガノポリシロキサン樹脂である。該モル比が上記下限値未満または上記上限値を超えると、得られる粘着層の粘着力や保持力が低下する場合がある。このR3 3SiO1/2単位/SiO4/2単位のモル比は、通常、NMR分析などの公知の構造解析方法によって求めることができる(以下、同じ) 。上記(B)成分は、1種単独であっても2種以上を併用してもよい。
上記SiOH基量およびアルコキシ基含有量は、通常、NMR分析などの公知の構造解析方法によって求めることができる(以下、同じ) 。さらに、上記シラノール基含有単位及びアルコキシ基含有単位の合計量は、上記水酸基含有量及びアルコキシ基含有量の合計として、(B)成分中に0.008~0.3mol/100g、さらに0.01~0.2mol/100gが好ましく、特に0.015~0.1mol/100gであることが好ましい。該水酸基又は該アルコキシ基を有することで、上記水酸基を有する(A)成分または(A’)成分または後述する(B’)と縮合反応することができる。
(C)成分はケイ素原子に結合する水素原子(SiH基)を1分子中に3個以上有するオルガノハイドロジェンポリシロキサンである。該オルガノハイドロジェンポリシロキサン(C)は、1種単独であっても2種以上を併用してもよい。該(C)成分は、ケイ素原子に結合する水素原子及びケイ素原子に結合する基の合計個数に対するケイ素原子に結合する水素原子の合計個数の割合が20%~50%である。該(C)成分のシロキサン平均重合度は100以下であり、好ましくは3~100、より好ましくは4~70、より好ましくは5~50、さらに好ましくは6~30である。
(D)成分は、上記(A)成分、(B)成分と、(C)成分及び任意の(C’)との付加反応を促進するための触媒である。所謂ヒドロシリル化反応を促進する触媒であればよく、公知の白金族金属系触媒を使用することができる。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、イリジ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、塩化白金酸、塩化白金酸のアルコール溶液又はアルデヒド溶液、塩化白金酸とアルコールとの反応物、塩化白金酸又は白金の各種オレフィン又はビニルシロキサンとの錯体等が挙げられる。なお、(D)成分は1種単独で使用しても2種以上を併用してもよい。
(E)成分は付加反応制御剤であり、任意成分である。加熱硬化前、例えば、シリコーン粘着剤組成物の調合時又は該粘着剤組成物の基材への塗工時に、該粘着剤組成物を含む処理液が増粘又はゲル化を起こさないようにするために添加することができる。例えば、各種有機窒素化合物、有機リン化合物、有機ケイ素化合物、アセチレン系化合物、不飽和カルボン酸エステル、オキシム化合物などが挙げられる。
本発明のシリコーン粘着剤組成物には、上記各成分以外に任意でその他の成分を添加することができる。その他の成分の配合量は従来公知のシリコーン粘着剤に従えばよく、本発明の効果を損ねない範囲において適宜調整されればよい。例えば、ポリジメチルシロキサン、ポリジメチルジフェニルシロキサンなどの非反応性のオルガノポリシロキサン;フェノール系、キノン系、アミン系、リン系、ホスファイト系、イオウ系、チオエーテル系などの酸化防止剤;トリアゾール系、ベンゾフェノン系などの光安定剤;リン酸エステル系、ハロゲン系、リン系、アンチモン系などの難燃剤;カチオン活性剤、アニオン活性剤、非イオン系活性剤などの帯電防止剤;染料;顔料;消泡剤;充填剤;レベリング剤;シランカップリング剤などの密着向上剤;増粘剤;光重合開始剤;反応性希釈剤及び塗工時に粘度を下げるための溶剤が挙げられる。
溶剤としては、トルエン、キシレン等の芳香族炭化水素系溶剤、ヘキサン、ヘプタン、オクタン、イソオクタン、デカン、シクロヘキサン、メチルシクロヘキサン、イソパラフィン等の脂肪族炭化水素系溶剤、工業用ガソリン、石油ベンジン、ソルベントナフサ等の炭化水素系溶剤、アセトン、メチルエチルケトン、2-ペンタノン、3-ペンタノン、2-ヘキサノン、2-ヘプタノン、4-ヘプタノン、メチルイソブチルケトン、ジイソブチルケトン、アセトニルアセトン、シクロヘキサノン等のケトン系溶剤、酢酸エチル、酢酸プロピル、酢酸イソプロピル、酢酸ブチル、酢酸イソブチル等のエステル系溶剤、ジエチルエーテル、ジプロピルエーテル、ジイソプロピルエーテル、ジブチルエーテル、1,2-ジメトキシエタン、1,4-ジオキサン等のエーテル系溶剤、2-メトキシエチルアセタート、2-エトキシエチルアセタート、プロピレングリコールモノメチルエーテルアセタート、2-ブトキシエチルアセタート等のエステルとエーテル部分を有する溶剤、ヘキサメチルジシロキサン、オクタメチルトリシロキサン、オクタメチルシクロテトラシロキサン、デカメチルシクロペンタシロキサン、トリス(トリメチルシロキシ)メチルシラン、テトラキス(トリメチルシロキシ)シラン等のシロキサン系溶剤などが使用できる。これらは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。溶剤を配合する場合、その量は(A)、(B)、及び(C)成分、及び、任意の(A’)、(B’)、及び(C’)の合計100質量部に対して、10~20,000質量部が好ましく、さらに25~10,000質量部が好ましく、特に50~1,000質量部であるのが好ましい。また、本発明のシリコーン粘着剤組成物は無溶剤型とすることもできる。
本発明のシリコーン粘着剤組成物は、上記した各成分を混合、溶解することにより調製できる。調製方法は、(A)、(B)、及び(C)成分、任意の(A’)、(B’)、及び(C’)成分、必要により(E)成分、及びその他の任意成分を予め均一に混合した後、(D)成分を使用直前に添加する方法がポットライフの面で望ましい。また、上述した通り、(A)成分及び/又は任意の(A’)成分及び(B)成分及び/又は任意の(B’)を予め縮合反応させておいてもよい。
基材としては、紙やプラスチック製のプラスチックフィルム、ガラス、金属、布等が選択される。紙としては、上質紙、コート紙、アート紙、グラシン紙、ポリエチレンラミネート紙、クラフト紙、和紙、合成紙等が挙げられる。プラスチックフィルムとしては、ポリエチレンフィルム、ポリプロピレンフィルム、ポリエステルフィルム、ポリイミドフィルム、ポリアミドフィルム、ポリ塩化ビニルフィルム、ポリ塩化ビニリデンフィルム、ポリビニルアルコールフィルム、ポリカーボネートフィルム、ポリテトラフルオロエチレンフィルム、ポリスチレンフィルム、エチレン-酢酸ビニル共重合体フィルム、エチレン-ビニルアルコール共重合体フィルム、トリアセチルセルロースフィルム、ポリエーテルエーテルケトンフィルム、ポリフェニレンサルファイドフィルム等が挙げられる。ガラスについては、厚みや種類等について特に制限はなく、化学強化処理等をしたものでもよい。また、ガラス繊維も適用でき、ガラス繊維は単体でも他の樹脂と複合したものを使用してもよい。布としては、天然繊維布、合成繊維布及び人工皮革などが挙げられ、金属としては、アルミ箔、銅箔、金箔、銀箔、ニッケル箔等が例示される。
塗工方法は、公知の塗工方式を用いて塗工すればよく、コンマコーター、リップコーター、ロールコーター、ダイコーター、ナイフコーター、ブレードコーター、ロッドコーター、バーコーター、キスコーター、グラビアコーター、スクリーン塗工、浸漬塗工、キャスト塗工などが挙げられる。
本発明のシリコーン粘着剤組成物を用いて製造した粘着テープまたは粘着フィルムは、特に限定されないが、高温環境下で使用される用途に有用である。例えば耐熱テープ、電気絶縁テープ、ヒートシールテープ、メッキマスキングテープ、熱処理用マスキングテープなどである。具体的な用途としては、電子部品や半導体部品の製造工程において、被着体の保護、マスキング、仮固定、搬送時固定、スプライス等が挙げられる。被着体としては、特に限定されないが、ステンレススチール、銅、鉄等の金属、表面がメッキ処理や防錆処理されたこれらの金属;ガラス、強化処理や防汚処理されたガラス、陶磁器等のセラミックス;ポリテトラフロロエチレン、ポリイミド、エポキシ樹脂、ノボラック樹脂、偏光板等の樹脂;更にこれらのうちの複数が複合されて構成された複合体などを例示することができる。
なお、下記において、部は質量部を示し、特性値は下記の試験方法による測定値を示す。また、各例中、Meはメチル基、Viはビニル基、Phはフェニル基を表す。
<調製例1>
(A-1)30質量%の濃度となるようにトルエンで溶解したときの25℃における粘度が58,000mPa・sであり、分子鎖両末端がビニル基で封鎖され、及び0.0008mol/100gのアルケニル基量を有する、下記式で示されるオルガノポリシロキサン(52質量部)、
(B-1)Me3SiO1/2単位、MeViSiO2/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサン(Me3SiO1/2単位/MeViSiO2/2単位/SiO4/2単位(モル比)=0.79/0.13/1.0、重量平均分子量3,400、アルケニル基含有量0.123mol/100g、ケイ素原子結合水酸基含有量0.031mol/100g、水酸基はSiO4/2単位由来のケイ素原子に結合している)の50質量%トルエン溶液(96質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(52質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物Iを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(42.5質量部)、
上記調製例1に記載の(B-1)Me3SiO1/2単位、MeViSiO2/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(115質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(42.5質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物IIを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(35.5質量部)、
上記調製例1に記載の(B-1)Me3SiO1/2単位、MeViSiO2/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(129質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(35.5質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物IIIを得た。
(A-2)30質量%の濃度となるようにトルエンで溶解したときの25℃における粘度が25,000mPa・sであり、分子鎖両末端がビニル基で封鎖され、0.0010mol/100gのアルケニル基量を有し、ケイ素原子に結合する基の合計個数に対するフェニル基の合計個数の割合が1.0%である、下記式で示されるオルガノポリシロキサン(45質量部)、
上記調製例1に記載の(B-1)Me3SiO1/2単位、MeViSiO2/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(110質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(45質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物IVを得た。
(A-3)30質量%の濃度となるようにトルエンで溶解したときの25℃における粘度が44,000mPa・sであり、分子鎖両末端がビニル基で封鎖され、0.0020mol/100gのアルケニル基量を有する下記式で示されるオルガノポリシロキサン(22.5質量部)、
(A’-1)30質量%の濃度となるようにトルエンで溶解したときの25℃における粘度が70,000mPa・sであり、分子鎖両末端がSiOH基で封鎖され、アルケニル基を有さない下記式で示されるオルガノポリシロキサン(20質量部)、
上記調製例1に記載の(B-1)Me3SiO1/2単位、MeViSiO2/2単位及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(115質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(42.5質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物Vを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(42.5質量部)、
上記調製例1に記載の(B-1)Me3SiO1/2単位、MeViSiO2/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(90質量部)、
(B’-1)Me3SiO1/2単位及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサン(Me3SiO1/2単位/SiO4/2単位(モル比)=0.69/1.0、重量平均分子量4,200、ケイ素原子結合水酸基含有量0.048mol/100g、水酸基はSiO4/2単位由来のケイ素原子に結合している)の50質量%トルエン溶液(25質量部)、及び
(E-1)エチニルシクロヘキサノール(0.20質量部)を混合し、トルエン(42.5質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物VIを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(42.5質量部)、
上記調製例1に記載の(B-1)Me3SiO1/2単位、MeViSiO2/2単位、SiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(76質量部)、
上記調製例6に記載の(B’-1)Me3SiO1/2単位及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(39質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(42.5質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物VIIを得た。
上記調製例5に記載の(A’-1)分子鎖両末端がSiOH基で封鎖され、アルケニル基を有さないオルガノポリシロキサン(7.8質量部)、
(B’-2)Me3SiO1/2単位及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサン(Me3SiO1/2単位/SiO4/2単位(モル比)=0.84/1.0、重量平均分子量3,400、ケイ素原子結合水酸基含有量0.108mol/100g、水酸基はSiO4/2単位由来のケイ素原子に結合している)の50質量%トルエン溶液(30質量部)、及び
トルエン(7.8質量部)、及びアンモニア水(0.1質量部)からなる溶液を室温(25℃)で12時間撹拌して縮合反応させた。次いで還流させながら約110~125℃で6時間加熱し、アンモニアと水を留去した。得られた反応生成物を放冷したのち、これに、
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(31.5質量部)、
上記調製例1に記載の(B-1)Me3SiO1/2単位、MeViSiO2/2単位、SiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(91.4質量部)、
(E-1)エチニルシクロヘキサノール(0.2質量部)を添加し、固形分が約50質量%となるようにトルエンを加えて混合し、シリコーン粘着剤ベース組成物VIIIを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(45質量部)、
(B-2)Me3SiO1/2単位、Me2ViSiO1/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサン(Me3SiO1/2単位/Me2ViSiO1/2/SiO4/2単位(モル比)=0.73/0.12/1.0、重量平均分子量3,800、アルケニル基含有量0.089mol/100g、ケイ素原子結合水酸基含有量0.026mol/100g、水酸基はSiO4/2単位由来のケイ素原子に結合している)の50質量%トルエン溶液(110質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(45質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物IXを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(37.5質量部)、
上記調製例9に記載の(B-2)Me3SiO1/2単位、Me2ViSiO1/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサン(125質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(37.5質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物Xを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(40質量部)、
上記調製例9に記載の(B-2)Me3SiO1/2単位、Me2ViSiO1/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサン(100質量部)、
(B’-3)Me3SiO1/2単位及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサン(Me3SiO1/2単位/SiO4/2単位(モル比)=0.83/1.0、重量平均分子量4,600、ケイ素原子結合水酸基含有量0.078mol/100g、水酸基はSiO4/2単位由来のケイ素原子に結合している)の50質量%トルエン溶液(20質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(40質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物XIを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(45質量部)、
上記調製例6に記載の(B’-1)Me3SiO1/2単位及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(110質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(45質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物10IIを得た。
上記調製例1に記載の(A-1)分子鎖両末端がビニル基で封鎖され、0.0008mol/100gのアルケニル基量を有するオルガノポリシロキサン(36質量部)、
上記調製例11に記載の(B’-3)Me3SiO1/2単位及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(128質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(36質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物10IIIを得た。
(比較例用 A-4)30質量%の濃度となるようにトルエンで溶解したときの25℃における粘度が22,000mPa・sであり、分子鎖両末端がビニル基で封鎖され、0.040mol/100gのアルケニル基量を有する下記式で示されるオルガノポリシロキサン(42.5質量部)、
上記調製例1に記載の(B-1)Me3SiO1/2単位、MeViSiO2/2単位、及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(115質量部)、及び
(E-1)エチニルシクロヘキサノール(0.2質量部)を混合し、トルエン(42.5質量部)を加えて、有効成分約50質量%のシリコーン粘着剤ベース組成物XIVを得た。
上記調製例5に記載の(A’-1)分子鎖両末端がSiOH基で封鎖され、アルケニル基を有さないオルガノポリシロキサン(45質量部)、
上記調製例6に記載の(B’-1)Me3SiO1/2単位及びSiO4/2単位からなり、ケイ素原子に結合した水酸基を有するオルガノポリシロキサンの50質量%トルエン溶液(110質量部)、
トルエン(45質量部)、及びアンモニア水(0.5質量部)からなる溶液を室温(25℃)で12時間撹拌して縮合反応させた。次いで還流させながら約110~125℃で6時間加熱し、アンモニアと水を留去した。得られた反応生成物を放冷したのち、固形分が約50質量%となるようにトルエンを加えて混合し、シリコーン粘着剤ベース組成物XVを得た。
(C)成分
(C-1)
(C-2)
(C-3)
(C’-1)
(D-1)
白金系触媒CAT-PL-50T(信越化学工業(株)製)
(F-1)
レア・アース・カルボン酸塩6%オクトープR(ホープ製薬(株)製)
(G-1)
有機過酸化物硬化剤ナイパーBMT-K40(日本油脂(株)製)
<実施例1~17、比較例1~10>
上記に示すシリコーン粘着剤ベース組成物、(C)、(C’)成分を、表1~5の配合量に従いフラスコに取り、トルエンを50質量部加え、撹拌して溶解した。得られた溶液に、(D-1)を(A)、(A’)、(B)、(B’)、(C)、(C’)の合計質量に対して、50ppm(白金質量換算)添加し、撹拌混合することでシリコーン粘着剤組成物を調製した。このシリコーン粘着剤組成物について、厚み25μm、幅25mmのポリイミドフィルムに、硬化後の粘着層の厚みが40μmとなるようにアプリケータを用いて塗工した後、130℃、1分の条件で加熱して硬化させ、粘着テープを作製した。
得られた粘着テープについて、粘着力、加熱中粘着力、保持力を下記の方法で測定した。結果を表1~5に示す。
上記に示すシリコーン粘着剤ベース組成物XV、(C)成分、比較例用添加剤(F-1)成分を、表5の配合量に従いフラスコに取り、トルエンを50質量部加え、撹拌して溶解した。得られた溶液に、(G-1)を3.0質量部添加し、撹拌混合することでシリコーン粘着剤組成物を調製した。このシリコーン粘着剤組成物について、厚み25μm、幅25mmのポリイミドフィルムに、硬化後の粘着層の厚みが40μmとなるようにアプリケータを用いて塗工した後、165℃、2分の条件で加熱し硬化させ、粘着テープを作製した。
得られた粘着テープについて、粘着力、加熱中粘着力、保持力を下記の方法で測定した。結果を表5に示す。
粘着テープをステンレススチール板に貼りつけ、ゴム層で被覆された重さ2kgのローラーを1往復させることにより圧着した。室温(25℃50%RH)で約20時間放置した。その後、引っ張り試験機を用いて室温にて、300mm/分の速度で180゜の角度の方向に粘着テープをステンレススチール板から引き剥がすのに要する平均の力(N/25mm)を測定した。
粘着テープをステンレススチール板に貼りつけ、ゴム層で被覆された重さ2kgのローラーを1往復させることにより圧着した。室温(25℃50%RH)で約20時間放置した。その後、恒温槽付きの引張試験機を用いて180℃雰囲気中で、300mm/分の速度で180゜の角度の方向に粘着テープをステンレススチール板から引き剥がすのに要する平均の力(N/25mm)を測定した。
粘着テープをステンレススチール板の下端に粘着面積が幅25mm×長さ25mmとなるように貼りつけ、ゴム層で被覆された重さ2kgのローラーを1往復させることにより圧着した。粘着テープの下端に重さ1kgの荷重をかけ、200℃で1時間、垂直に放置した後のずれ距離(mm)を顕微鏡で拡大して読み取り、測定した。
また、アルケニル基含有量が多い(A-4)を用いた比較例6の組成物は、架橋密度が高くなり過ぎ、粘着層が硬くなり粘着力が低下した。SiH基の割合が小さい(C’-1)を用いた比較例7の組成物から得た硬化物は180℃加熱中に凝集破壊を起こした。比較例8の組成物から得た硬化物は粘着力が大きく低下した。また、(A)成分と(B)成分のアルケニル基の合計個数に対する(C)成分中のSiH基の個数の比が2.0よりも大きい比較例9及び10の組成物は架橋密度が高くなり過ぎ、粘着層が硬くなり、粘着力が低下した。過酸化物硬化型粘着剤に(C-3)成分と、レア・アース・カルボン酸塩(F-1)を添加した比較例11の組成物から得た硬化物は、室温の粘着力が6.5N/25mmに対し、180℃加熱中の粘着力が1.9N/25mmと半分以下に低下した。
これに対し、表1~3に示す通り、本発明のシリコーン粘着剤組成物からなる粘着テープは、室温の高い粘着力を180℃加熱中も維持し、粘着力の低下が小さい。さらに加熱中の保持力も良好である。
Claims (9)
- 下記(A)~(D)成分を含有するシリコーン粘着剤組成物
(A)1分子中に2個以上のアルケニル基を有し、アルケニル基含有量が0.0001~0.03mol/100gである、直鎖状オルガノポリシロキサン:20~65質量部
(B)1分子中に1個以上のアルケニル基を有し、さらにR3 3SiO1/2単位及びSiO4/2単位を有し、(R3 3SiO1/2単位)/(SiO4/2単位)で表されるモル比が0.5~1.5であるオルガノポリシロキサン樹脂(式中、R3は、互いに独立に、置換又は非置換の、炭素原子数1~10の1価炭化水素基である):35~80質量部
(但し、上記(A)及び(B)成分の合計は100質量部である)
(C)ケイ素原子に結合する水素原子を1分子中に3個以上有し、該(C)成分中、ケイ素原子に結合する水素原子及びケイ素原子に結合する基の合計個数に対するケイ素原子に結合する水素原子の合計個数の割合が20%~50%であり、シロキサン平均重合度が100以下であるオルガノハイドロジェンポリシロキサン:上記(A)成分及び(B)成分中のアルケニル基の合計個数に対する該(C)成分中のSiH基の合計個数の比が0.1~2.0である量、及び
(D)白金族金属系触媒:触媒量。 - 前記(B)成分が、アルケニル基を0.005~0.5mol/100gの量で有する、請求項1記載のシリコーン粘着剤組成物。
- (A)成分及び(B)成分中のアルケニル基の合計個数に対する、(C)成分中のSiH基の合計個数の比が、0.15~0.95である、請求項1または2記載のシリコーン粘着剤組成物。
- (B)成分が、さらにR4R5SiO2/2単位を有し(式中、R4はアルケニル基以外の上記R3で示される基であり、R5は炭素数2~10のアルケニル基である)、(R4R5SiO2/2単位)/(SiO4/2単位)で表されるモル比0.01~0.5を有するオルガノポリシロキサン樹脂である、請求項1~5のいずれか1項記載のシリコーン粘着剤組成物。
- 請求項1~6のいずれか1項記載のシリコーン粘着剤組成物を硬化して成る硬化物。
- 基材と、該基材の少なくとも片面に形成された粘着層とを備える粘着テープであって、該粘着層が請求項7記載の硬化物である、前記粘着テープ。
- 基材と、該基材の少なくとも片面に形成された粘着層とを備える粘着フィルムであって、該粘着層が請求項7記載の硬化物である、前記粘着フィルム。
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| CN202380024329.9A CN118804962A (zh) | 2022-04-04 | 2023-03-28 | 硅酮粘着剂组合物、粘着带及粘着膜 |
| JP2024514240A JPWO2023195390A1 (ja) | 2022-04-04 | 2023-03-28 | |
| EP23784680.3A EP4509572A1 (en) | 2022-04-04 | 2023-03-28 | Silicone adhesive composition, adhesive tape, and adhesive film |
| KR1020247030976A KR20240171076A (ko) | 2022-04-04 | 2023-03-28 | 실리콘 점착제 조성물, 점착 테이프 및 점착 필름 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004117831A (ja) * | 2002-09-26 | 2004-04-15 | Shin Etsu Polymer Co Ltd | 透明衝撃緩和部材および透明積層体 |
| JP2007191637A (ja) * | 2006-01-20 | 2007-08-02 | Shin Etsu Chem Co Ltd | 粘着性シリコーンゴムコーティング剤組成物 |
| JP2009051916A (ja) * | 2007-08-24 | 2009-03-12 | Dow Corning Toray Co Ltd | シリコーン系感圧接着剤組成物および感圧接着テープもしくはシート |
| JP2010006918A (ja) | 2008-06-26 | 2010-01-14 | Shin-Etsu Chemical Co Ltd | 有機過酸化物硬化型シリコーン粘着剤組成物及び粘着テープ |
| JP2014205762A (ja) * | 2013-04-12 | 2014-10-30 | 信越化学工業株式会社 | 無溶剤型シリコーン粘着剤組成物及び粘着性物品 |
| JP2015151447A (ja) | 2014-02-13 | 2015-08-24 | 日東電工株式会社 | シリコーン粘着剤組成物、粘着テープおよび粘着テープの製造方法 |
| JP2018119153A (ja) | 2014-03-28 | 2018-08-02 | 信越化学工業株式会社 | シリコーン粘着剤組成物、その製造法及び粘着フィルム |
| WO2019049200A1 (ja) | 2017-09-05 | 2019-03-14 | 株式会社寺岡製作所 | シリコーン系粘着剤組成物及び粘着テープ |
| WO2019142779A1 (ja) * | 2018-01-16 | 2019-07-25 | 信越化学工業株式会社 | シリコーン粘着剤組成物、粘着フィルムおよび粘着テープ |
| WO2020026844A1 (ja) * | 2018-08-01 | 2020-02-06 | 信越化学工業株式会社 | シリコーン粘着剤組成物及びこれを用いた粘着テープ又は粘着フィルム |
-
2023
- 2023-03-28 CN CN202380024329.9A patent/CN118804962A/zh active Pending
- 2023-03-28 JP JP2024514240A patent/JPWO2023195390A1/ja active Pending
- 2023-03-28 KR KR1020247030976A patent/KR20240171076A/ko active Pending
- 2023-03-28 WO PCT/JP2023/012585 patent/WO2023195390A1/ja not_active Ceased
- 2023-03-28 EP EP23784680.3A patent/EP4509572A1/en active Pending
- 2023-03-28 TW TW112111818A patent/TW202405127A/zh unknown
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004117831A (ja) * | 2002-09-26 | 2004-04-15 | Shin Etsu Polymer Co Ltd | 透明衝撃緩和部材および透明積層体 |
| JP2007191637A (ja) * | 2006-01-20 | 2007-08-02 | Shin Etsu Chem Co Ltd | 粘着性シリコーンゴムコーティング剤組成物 |
| JP2009051916A (ja) * | 2007-08-24 | 2009-03-12 | Dow Corning Toray Co Ltd | シリコーン系感圧接着剤組成物および感圧接着テープもしくはシート |
| JP2010006918A (ja) | 2008-06-26 | 2010-01-14 | Shin-Etsu Chemical Co Ltd | 有機過酸化物硬化型シリコーン粘着剤組成物及び粘着テープ |
| JP2014205762A (ja) * | 2013-04-12 | 2014-10-30 | 信越化学工業株式会社 | 無溶剤型シリコーン粘着剤組成物及び粘着性物品 |
| JP2015151447A (ja) | 2014-02-13 | 2015-08-24 | 日東電工株式会社 | シリコーン粘着剤組成物、粘着テープおよび粘着テープの製造方法 |
| JP2018119153A (ja) | 2014-03-28 | 2018-08-02 | 信越化学工業株式会社 | シリコーン粘着剤組成物、その製造法及び粘着フィルム |
| WO2019049200A1 (ja) | 2017-09-05 | 2019-03-14 | 株式会社寺岡製作所 | シリコーン系粘着剤組成物及び粘着テープ |
| WO2019142779A1 (ja) * | 2018-01-16 | 2019-07-25 | 信越化学工業株式会社 | シリコーン粘着剤組成物、粘着フィルムおよび粘着テープ |
| WO2020026844A1 (ja) * | 2018-08-01 | 2020-02-06 | 信越化学工業株式会社 | シリコーン粘着剤組成物及びこれを用いた粘着テープ又は粘着フィルム |
Also Published As
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| TW202405127A (zh) | 2024-02-01 |
| CN118804962A (zh) | 2024-10-18 |
| KR20240171076A (ko) | 2024-12-06 |
| EP4509572A1 (en) | 2025-02-19 |
| JPWO2023195390A1 (ja) | 2023-10-12 |
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