WO2024095637A1 - 活性エネルギー線硬化性組成物及び硬化物 - Google Patents
活性エネルギー線硬化性組成物及び硬化物 Download PDFInfo
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- WO2024095637A1 WO2024095637A1 PCT/JP2023/034725 JP2023034725W WO2024095637A1 WO 2024095637 A1 WO2024095637 A1 WO 2024095637A1 JP 2023034725 W JP2023034725 W JP 2023034725W WO 2024095637 A1 WO2024095637 A1 WO 2024095637A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/062—Polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/067—Polyurethanes; Polyureas
Definitions
- the present invention relates to an active energy ray-curable composition and a cured product.
- the object of the present invention is to provide an active energy ray-curable composition that gives a cured product that is highly flexible and stretchable.
- the present invention provides an active energy ray-curable composition containing a monofunctional monomer (A), a polyfunctional (meth)acrylate (C) having a number average molecular weight of 500 to 40,000, and a photopolymerization initiator (D), wherein the monofunctional monomer (A) contains a monofunctional monomer (A1) having a homopolymer glass transition temperature of less than 25° C. and a monofunctional monomer (A2) having a homopolymer glass transition temperature of 25° C.
- the content of the monofunctional monomer (A) is 10 to 75% by weight
- the content of the polyfunctional (meth)acrylate (C) is 25 to 90% by weight
- the content of the photopolymerization initiator (D) is 0.1 to 20% by weight, based on the total weight of the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C), and the molecular weight between crosslinking points is 1,000 to 25,000; and a cured product obtained by curing the active energy ray-curable composition.
- the active energy ray-curable composition of the present invention has the effect of producing a cured product that is highly flexible and stretchable.
- the active energy ray-curable composition of the present invention is an active energy ray-curable composition that contains a monofunctional monomer (A), a polyfunctional (meth)acrylate (C) having a number average molecular weight of 500 to 40,000, and a photopolymerization initiator (D).
- A monofunctional monomer
- C polyfunctional (meth)acrylate
- D photopolymerization initiator
- (meth)acrylate means “methacrylate or acrylate”
- (meth)acrylic means “methacrylic or acrylic”
- (meth)acryloyl means “methacryloyl or acryloyl”.
- the essential components of the active energy ray-curable composition of the present invention the monofunctional monomer (A), the polyfunctional (meth)acrylate (C) having a number average molecular weight of 500 to 40,000, and the photopolymerization initiator (D), are described below in order.
- the monofunctional monomer (A) contains a monofunctional monomer (A1) whose homopolymer has a glass transition temperature of less than 25°C and a monofunctional monomer (A2) whose homopolymer has a glass transition temperature of 25°C or higher.
- the chemical structure of the monofunctional monomer (A1) having a homopolymer glass transition temperature of less than 25°C is not particularly limited as long as the homopolymer has a glass transition temperature of less than 25°C.
- the glass transition temperature of a homopolymer refers to the temperature at which the loss tangent (tan ⁇ ) is maximum when the dynamic viscoelasticity of the polymer obtained by homopolymerizing the monofunctional monomer using the method described below is measured using the method described below.
- the laminate of (2) is irradiated with 1000 mJ/cm2 at an illuminance of 1500 mW/cm2 (UV- A ) using an ultraviolet irradiation device (e.g., VPS/I600 manufactured by Fusion UV Systems Japan, lamp: D bulb) in an environment of 25 ° C.
- the laminate of (2) is then turned over and irradiated from the other side with 1000 mJ/ cm2 to cure the composition.
- the hardened sample of (3) is cut into a test piece having a length of 40 mm, a width of 5 mm, and a thickness of 1 mm.
- ⁇ Dynamic viscoelasticity measurement method> Using this test piece, the dynamic viscoelasticity is measured under the following conditions using a dynamic viscoelasticity measuring device (eg, Rheogel-E4000, manufactured by UBM). Measurement mode: temperature dependence, measurement temperature range: -80°C to 200°C, frequency: 10 Hz, heating rate: 4°C/min, distortion waveform: sine wave, measurement jig: tensile.
- the temperature at which the ratio (tan ⁇ ) of the loss modulus E" to the storage modulus E' in the obtained spectrum is maximum is defined as the glass transition temperature (Tg).
- the monofunctional monomer (A1) having a homopolymer glass transition temperature of less than 25°C is preferably at least one selected from the group consisting of monofunctional (meth)acrylates (E) having a linear or branched alkyl group with 10 to 22 carbon atoms, monofunctional urethane (meth)acrylates (F) and other monofunctional (meth)acrylates (G).
- Examples of monofunctional (meth)acrylates (E) having a straight-chain or branched alkyl group having 10 to 22 carbon atoms include decyl (meth)acrylate, isodecyl (meth)acrylate, undecyl (meth)acrylate, lauryl (meth)acrylate, tridecyl (meth)acrylate, stearyl (meth)acrylate, isostearyl (meth)acrylate, and behenyl (meth)acrylate.
- These (meth)acrylates can be easily produced by direct esterification or transesterification of (meth)acrylic acid or methyl (meth)acrylate with natural or synthetic alcohol.
- the alkyl group will be straight-chained and have an even carbon number. If a synthetic alcohol is used, for example, Dobanol (manufactured by Mitsubishi Chemical Corporation), the alkyl group will be a mixture of straight-chain and branched, and the number of carbon atoms will be a mixture of odd and even. If Diadol (manufactured by Mitsubishi Chemical Corporation) is used, the alkyl group will be a mixture of straight-chain and branched, and the number of carbon atoms will be only odd. In the present invention, these monofunctional (meth)acrylates (E) having a linear or branched alkyl group having 10 to 22 carbon atoms may be used alone or in combination of two or more kinds.
- these monofunctional (meth)acrylates (E) having a linear or branched alkyl group having 10 to 22 carbon atoms may be used alone or in combination of two or more kinds.
- lauryl (meth)acrylate, isodecyl (meth)acrylate, and isostearyl (meth)acrylate are preferred from the viewpoints of the elongation rate of the cured product, the strength of the cured product, and the adhesion to the substrate.
- the monofunctional urethane (meth)acrylate (F) in the present invention means a monomer having one (meth)acryloyl group and at least one urethane group in the molecule. From the viewpoint of viscosity, a monomer having one (meth)acryloyl group and one urethane group is preferred.
- Examples of the monofunctional urethane (meth)acrylate (F) include a reaction product of a monofunctional (meth)acrylate having a hydroxyl group (a) and an organic monoisocyanate compound (b).
- Examples of the monofunctional (meth)acrylate (a) having a hydroxyl group include hydroxyalkyl (meth)acrylates (2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, and 1,4-cyclohexanedimethanol monoacrylate).
- the hydroxyl group-containing monofunctional (meth)acrylate (a) may be used alone or in combination of two or more kinds.
- Examples of the organic monoisocyanate compound (b) include an aliphatic monoisocyanate compound (b1), an alicyclic monoisocyanate compound (b2), and an aromatic monoisocyanate compound (b3).
- Examples of the aliphatic monoisocyanate compound (b1) include methyl isocyanate, ethyl isocyanate, propyl isocyanate, isopropyl isocyanate, butyl isocyanate, hexyl isocyanate, octyl isocyanate, lauryl isocyanate, tetradecyl isocyanate, hexadecyl isocyanate, and octadecyl isocyanate.
- Examples of the alicyclic monoisocyanate compound (b2) include cyclohexyl isocyanate.
- Examples of the aromatic monoisocyanate compound (b3) include phenyl isocyanate and tolylene isocyanate.
- the organic monoisocyanate compound (b) may be used alone or in combination of two or more kinds.
- organic monoisocyanate compounds (b) from the viewpoint of the elongation rate and viscosity of the cured product, the aliphatic monoisocyanate compound (b1) and the alicyclic monoisocyanate compound (b2) are preferred, the aliphatic monoisocyanate compound (b1) is more preferred, and methyl isocyanate, ethyl isocyanate, propyl isocyanate, butyl isocyanate, and hexyl isocyanate are particularly preferred.
- the monofunctional urethane (meth)acrylate (F) a reaction product obtained by subjecting a monofunctional (meth)acrylate having a hydroxyl group (a) and an organic monoisocyanate compound (b) to a urethane reaction by a known method can be used.
- products available on the market may be used, and examples of commercially available products include Viscoat #216 (2-[(butylamino)carbonyl]oxyethyl acrylate: manufactured by Osaka Organic Chemical Industry Co., Ltd.), Etermer EM2080 (manufactured by Choko Materials Co., Ltd.), and Genomer 1122 (manufactured by RAHN).
- Other monofunctional (meth)acrylates (G) include methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, tert-butyl (meth)acrylate, hexyl (meth)acrylate, isoamyl (meth)acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, nonyl (meth)acrylate, benzyl (meth)acrylate, phenoxyethyl (meth)acrylate, 2-ethylhexyl diglycol (meth)acrylate, 2-ethylhexyl carbitol (meth)acrylate, 2,2,2-tetrafluoroethyl (meth)acrylate, 1H,1H,2H,2H-perf
- the acrylates include fluorodecyl (meth)acrylate, 4-butylphenyl (meth)acrylate,
- the chemical structure of the monofunctional monomer (A2) having a homopolymer glass transition temperature of 25°C or higher is not particularly limited as long as the homopolymer glass transition temperature is 25°C or higher.
- Examples of the monofunctional monomer (A2) having a homopolymer glass transition temperature of 25°C or higher include (meth)acrylates (H) having an alicyclic skeleton, monofunctional monomers (I) having a nitrogen atom in the molecule, and other monofunctional (meth)acrylates (J), and from the viewpoint of curability, monofunctional monomers (I) having a nitrogen atom in the molecule are preferred.
- Examples of the (meth)acrylate (H) having an alicyclic skeleton include isobornyl (meth)acrylate, cyclohexyl (meth)acrylate, t-butylcyclohexyl (meth)acrylate, 1-ethylcyclohexyl (meth)acrylate, and adamantyl (meth)acrylate.
- these (meth)acrylates (H) having an alicyclic skeleton may be used alone or in combination of two or more kinds.
- (meth)acrylates (H) having an alicyclic skeleton isobornyl (meth)acrylate, t-butylcyclohexyl (meth)acrylate, trimethylcyclohexyl (meth)acrylate, and 1-ethylcyclohexyl (meth)acrylate are preferred from the viewpoint of the elongation rate and strength of the cured product.
- Examples of the monofunctional monomer (I) having a nitrogen atom in the molecule include N-substituted vinyl monomers and N-substituted (meth)acrylamides, with N-substituted (meth)acrylamides being preferred from the viewpoint of curability.
- Examples of N-substituted vinyl monomers include N-vinylpyrrolidone, N-vinylcarbazole, N-vinylcaprolactam, N-vinylimidazole, and vinylmethyloxazolidinone.
- the N-substituted (meth)acrylamide means a (meth)acrylamide in which one or two hydrogen atoms of the amino group are substituted with a substituent such as a hydrocarbon group.
- N-substituted (meth)acrylamide examples include linear amides (I1) having an N-(meth)acryloyl group, cyclic amides (I2) having an N-(meth)acryloyl group, and diacetone acrylamide.
- chain amides (I1) having an N-(meth)acryloyl group examples include N-alkyl(meth)acrylamides (I11), N,N-dialkyl(meth)acrylamides (I12), N-hydroxyalkyl(meth)acrylamides (I13), N-alkoxyalkyl(meth)acrylamides (I14), and N-alkyl-N-alkoxy(meth)acrylamides (I15).
- N-alkyl(meth)acrylamides (I11) include N-methyl(meth)acrylamide, N-ethyl(meth)acrylamide, N-propyl(meth)acrylamide, N-isopropyl(meth)acrylamide, N-dodecyl(meth)acrylamide, and N-octadecyl(meth)acrylamide.
- N,N-dialkyl(meth)acrylamide (I12) includes N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, N,N-dipropyl(meth)acrylamide, N,N-diisopropyl(meth)acrylamide, N,N-dibutyl(meth)acrylamide, N,N-diisobutyl(meth)acrylamide, N,N-di-tert-butyl(meth)acrylamide, N,N-diheptyl(meth)acrylamide, N,N-dioctyl(meth)acrylamide, N,N-di-tert-octyl(meth)acrylamide, N,N-didodecyl(meth)acrylamide, and N,N-dioctadecyl(meth)acrylamide.
- the two alkyl groups in N,N-dialkyl(meth)acrylamide (I12) may be the same or different, and the number of carbon atoms in the alkyl group is preferably 1 to 20, more preferably 1 to 8, and particularly preferably 1 to 4, from the viewpoint of curability.
- N-hydroxyalkyl(meth)acrylamide (I13) includes N-hydroxymethyl(meth)acrylamide, N-hydroxyethyl(meth)acrylamide, and N-(3-hydroxypropyl)(meth)acrylamide. From the viewpoint of curability, the number of carbon atoms in the alkyl group of N-hydroxyalkyl(meth)acrylamide (I13) is preferably 1 to 20, more preferably 1 to 8, and particularly preferably 1 to 4.
- N-alkoxyalkyl(meth)acrylamide (I14) includes N-methoxymethyl(meth)acrylamide, N-ethoxymethyl(meth)acrylamide, N-propoxymethyl(meth)acrylamide, N-butoxymethyl(meth)acrylamide, N-methoxyethyl(meth)acrylamide, N-ethoxyethyl(meth)acrylamide, N-butoxyethyl(meth)acrylamide, N-methoxypropyl(meth)acrylamide, N-ethoxypropyl(meth)acrylamide, N-methoxybutyl(meth)acrylamide, and N-ethoxybutyl(meth)acrylamide.
- the number of carbon atoms in the alkoxyalkyl group of N-alkoxyalkyl(meth)acrylamide (I14) is preferably 2 to 20, more preferably 2 to 8, and particularly preferably 2 to 6.
- the number of carbon atoms in the alkyl group of the alkoxyalkyl group is preferably 1 to 4, more preferably 1 to 3, and particularly preferably 1 to 2.
- N-alkyl-N-alkoxy(meth)acrylamide (I15) includes N-methyl-N-methoxy(meth)acrylamide, N-methyl-N-ethoxy(meth)acrylamide, N-methyl-N-propoxy(meth)acrylamide, N-methyl-N-butoxy(meth)acrylamide, N-ethyl-N-methoxy(meth)acrylamide, N-ethyl-N-ethoxy(meth)acrylamide, N-ethyl-N-butoxy(meth)acrylamide, N-propyl-N-methoxy(meth)acrylamide, N-propyl-N-ethoxy(meth)acrylamide, N-butyl-N-methoxy(meth)acrylamide, and N-butyl-N-ethoxy(meth)acrylamide.
- Examples of the cyclic amide (I2) having an N-(meth)acryloyl group include N-(meth)acryloylmorpholine, N-(meth)acryloylthiomorpholine, N-(meth)acryloylpiperidine, N-(meth)acryloylpyrrolidine, and N-(meth)acryloylpiperidine.
- the number of carbon atoms in the cyclic amide having an N-(meth)acryloyl group is preferably 7 to 20, more preferably 7 to 18, and particularly preferably 7 to 16.
- these N-substituted (meth)acrylamides may be used alone or in combination of two or more.
- N-substituted (meth)acrylamides from the viewpoints of viscosity, curability, and elongation of the cured product, preferred are N,N-dialkyl(meth)acrylamides (I12), N-alkoxyalkyl(meth)acrylamides (I14), and cyclic amides having an N-(meth)acryloyl group (I2), more preferred are N,N-dialkyl(meth)acrylamides (I12) and cyclic amides having an N-(meth)acryloyl group (I2), and particularly preferred are N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, and N-(meth)acryloylmorpholine.
- Other monofunctional (meth)acrylates (J) include cyclic trimethylolpropane formal (meth)acrylate, 2-phenoxyethyl acrylate, etc.
- a bifunctional (meth)acrylate having a number average molecular weight of 500 to 40,000 is preferred, and examples of such a bifunctional (meth)acrylate include the bifunctional (meth)acrylate (K) represented by the general formula (1) and other bifunctional (meth)acrylates (L).
- the bifunctional (meth)acrylate (K) represented by the general formula (1) is as follows. CH 2 ⁇ CXCO-O-(R—O) n -COCX ⁇ CH 2 (1) [In the general formula (1), n is an integer of 2 to 15, R is an alkylene group having 2 to 6 carbon atoms (when there are multiple R in one molecule, each R is independently an alkylene group having 2 to 6 carbon atoms), and each X is independently a hydrogen atom or a methyl group.]
- R represents an alkylene group having 2 to 6 carbon atoms, and specific examples thereof include an ethylene group, a 1,2-propylene group, a 1,3-propylene group, a 1,2-butylene group, a 1,3-butylene group, and a 1,4-butylene group. From the viewpoint of hardness of the cured product, R preferably has 2 to 3 carbon atoms, and more preferably is an ethylene group or a 1,2-propylene group. n is an integer of 2 or more and 15 or less, and is preferably an integer of 7 or more and 15 or less from the viewpoint of low outgassing properties and bending resistance.
- n means the number of repeats of the alkyleneoxy group. The same applies hereinafter.
- These difunctional (meth)acrylates (K) can be used alone or in combination of two or more.
- Other bifunctional (meth)acrylates (L) include di(meth)acrylates (L1) of 4-25 moles of alkylene oxide (alkylene group has 2-4 carbon atoms) adducts of dihydric phenol compounds, diesters of (meth)acrylic acid and 1-15 moles of alkylene oxide (alkylene group has 2-4 carbon atoms) adducts of dihydric alcohols having 2-30 carbon atoms, diesters of diglycidyl ether and (meth)acrylic acid, and di(meth)acrylates of ethylene oxide adducts of fluorene, silicone diacrylates (L2), urethane diacrylates (L3), etc.
- Di(meth)acrylates (L1) of 4 to 25 moles of alkylene oxide (alkylene group carbon number 2 to 4) adducts of dihydric phenol compounds include di(meth)acrylates of alkylene oxide adducts of dihydric phenol compounds [monocyclic phenols (catechol, resorcinol, hydroquinone, etc.), condensed polycyclic phenols (dihydroxynaphthalene, etc.), bisphenol compounds (bisphenol A, bisphenol F, bisphenol S, etc.)], such as di(meth)acrylates of ethylene oxide (hereinafter, ethylene oxide may be abbreviated as EO) adducts of catechol, di(meth)acrylates of propylene oxide (hereinafter, 1,2- or 1,3-propylene oxide may be abbreviated as PO) adducts of dihydroxynaphthalene, and di(meth)acrylates of EO adducts of bisphenol A.
- silicone diacrylate (L2) examples include EBECRYL350 and EBECRYL1360.
- Urethane diacrylate (L3) is a urethane (meth)acrylate containing polyol (m), polyisocyanate (n), and active hydrogen group-containing (meth)acrylate (c) as constituent raw materials.
- Polyols (m) include linear aliphatic polyols (m1) having 1 to 20 carbon atoms, alicyclic polyols (m2) having 6 to 20 carbon atoms, and aromatic polyols (m3) having 6 to 20 carbon atoms, as well as their alkylene oxide adducts [ethylene oxide (EO), 1,2- or 1,3-propylene oxide (PO), and 1,2-, 1,3-, 1,4- or 2,3-butylene oxide, etc.].
- EO ethylene oxide
- PO 1,2- or 1,3-propylene oxide
- 2,3-butylene oxide 1,3-butylene oxide
- linear aliphatic polyol (m1) examples include linear aliphatic diols having 1 to 20 carbon atoms (ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-dodecanediol, etc.), branched aliphatic diols (1,2-propanediol, 1,2-, 1,3- or 2,3-butanediol, 2-methyl-1,4-butanediol, neopentyl glycol, 2,2-diethyl-1,3-propanediol, 2-methyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, etc.), and linear alipha
- Examples of alicyclic polyols (m2) having 6 to 20 carbon atoms include 1,2-cyclohexanediol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanediol, 1,3-cyclopentanediol, 1,4-cycloheptanediol, 1,4-bis(hydroxymethyl)cyclohexane, 2,2-bis(4-hydroxycyclohexyl)propane, and 1,3,5-cyclohexanetriol.
- aromatic polyols (m3) having 6 to 20 carbon atoms include resorcinol, hydroquinone, naphthalene diol, and bisphenols (such as bisphenol A, bisphenol F, and bisphenol S).
- the number of moles of alkylene oxide added is preferably 1 to 50 moles, more preferably 4 to 30 moles, from the viewpoint of the elongation of the cured product.
- polys (m) from the viewpoint of elongation of the cured product, preferred are alkylene oxide adducts of the above-mentioned chain aliphatic polyols (m1), more preferred are 1,4-butylene oxide adducts of the aliphatic polyols (m1), and particularly preferred is poly-1,4-butylene oxide (polytetramethylene glycol).
- the polyol (m) may be used alone or in combination of two or more kinds.
- polyisocyanates (n) examples include linear aliphatic polyisocyanates (n1) having 4 to 20 carbon atoms, alicyclic polyisocyanates (n2) having 6 to 22 carbon atoms, and aromatic polyisocyanates (n3) having 8 to 22 carbon atoms.
- chain aliphatic polyisocyanates (n1) having 4 to 20 carbon atoms examples include ethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate (HDI), dodecamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, and lysine diisocyanate.
- alicyclic polyisocyanates (n2) having 6 to 22 carbon atoms include cyclohexane-1,3-diylbismethylene diisocyanate, isophorone diisocyanate (IPDI), 2,4- or 2,6-methylcyclohexane diisocyanate (hydrogenated TDI), dicyclohexylmethane-4,4'-diisocyanate (hydrogenated MDI; hereafter sometimes referred to as MDIH), cyclohexylene diisocyanate, methylcyclohexylene diisocyanate, bis(2-isocyanatoethyl)-4-cyclohexylene-1,2-dicarboxylate, 2,5- or 2,6-norbornane diisocyanate, and dimer acid diisocyanate.
- IPDI isophorone diisocyanate
- TDI 2,4- or 2,6-methylcyclohexane diisocyanate
- MDIH di
- Aromatic polyisocyanates (n3) having 8 to 22 carbon atoms include 1,3- or 1,4-phenylene diisocyanate, 2,4- or 2,6-tolylene diisocyanate (TDI), 4,4'- or 2,4'-diphenylmethane diisocyanate (MDI), m- or p-isocyanatophenylsulfonyl isocyanate, 4,4'-diisocyanatobiphenyl, 3,3'-dimethyl-4,4'-diisocyanatobiphenyl, 3,3'-dimethyl-4,4'-diisocyanatodiphenylmethane, 1,5-naphthylene diisocyanate, m- or p-isocyanatophenylsulfonyl isocyanate, m- or p-xylylene diisocyanate (XDI), and ⁇ , ⁇ , ⁇ ', ⁇ '-tetramethylxylylene diis
- polyisocyanates (n) from the viewpoint of elongation and light resistance of the cured product, preferred are alicyclic polyisocyanates (n2) having 6 to 22 carbon atoms and aromatic polyisocyanates (n3) having 8 to 22 carbon atoms, more preferred are alicyclic polyisocyanates having 6 to 20 carbon atoms and aromatic polyisocyanates having 8 to 20 carbon atoms, particularly preferred are cyclohexane-1,3-diylbismethylene diisocyanate, IPDI, XDI, TMXDI, MDI and TDI, and most preferred is IPDI.
- the polyisocyanate (n) may be used alone or in combination of two or more kinds.
- Examples of the active hydrogen group-containing (meth)acrylate (c) include hydroxyl group-containing (meth)acrylate (c1), amino group-containing (meth)acrylate (c2), and carboxyl group-containing (meth)acrylate (c3), etc. Among these, preferred is the hydroxyl group-containing (meth)acrylate.
- Examples of the hydroxyl group-containing (meth)acrylate (c1) include hydroxyalkyl (meth)acrylate (c11) and polyalkylene glycol mono(meth)acrylate (c12).
- Hydroxyalkyl (meth)acrylates (c11) preferably include hydroxyalkyl (meth)acrylates having 4 to 20 carbon atoms, and specific examples include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, and 3-hydroxypropyl (meth)acrylate.
- polyalkylene glycol mono(meth)acrylates (c12) examples include polyethylene glycol mono(meth)acrylate and polypropylene glycol mono(meth)acrylate.
- amino group-containing (meth)acrylates (c2) include monoalkyl (carbon number 1-4) aminoalkyl (carbon number 2-6) (meth)acrylates ⁇ aminoethyl, aminopropyl, methylaminoethyl, ethylaminoethyl, butylaminoethyl, or methylaminopropyl (meth)acrylate ⁇ and dialkyl (carbon number 1-4) aminoalkyl (carbon number 2-6) (meth)acrylates ⁇ dimethylaminoethyl (meth)acrylate, diethylaminoethyl (meth)acrylate, dibutylaminoethyl (meth)acrylate, etc. ⁇ .
- carboxyl group-containing (meth)acrylates (c3) examples include 2-(meth)acryloyloxyethyl succinate, 2-(meth)acryloyloxyethyl phthalate, and 2-(meth)acryloyloxyethyl hexahydrophthalate.
- hydroxyl group-containing (meth)acrylates (c) from the viewpoints of reactivity in the urethane reaction and elongation of the cured product, preferred are hydroxyl group-containing (meth)acrylates (c1), more preferred are hydroxyl group-containing monofunctional (meth)acrylates, particularly preferred are hydroxyalkyl (meth)acrylates (c11), and most preferred is 2-hydroxyethyl (meth)acrylate.
- the active hydrogen group-containing (meth)acrylate (c) may be used alone or in combination of two or more kinds.
- the urethane diacrylate (L3) may be used alone or in combination of two or more kinds.
- the molar ratio of the isocyanate groups in the polyisocyanate (n) to the active hydrogen groups in the polyol (m) and active hydrogen group-containing (meth)acrylate (c) [isocyanate groups in (n)/total of active hydrogen groups in (m) and active hydrogen groups in (c)] is not particularly limited, but is preferably 1/0.5 to 1/10, more preferably 1/0.7 to 1/5, and particularly preferably 1/1 to 1/2, from the viewpoint of storage stability.
- the urethane diacrylate (L3) in the present invention can be produced by reacting a polyol (m), a polyisocyanate (n) and an active hydrogen group-containing (meth)acrylate (c) by a known method.
- a polyol (m) and a polyisocyanate (n) it is preferable to produce the urethane prepolymer having two or more isocyanate groups by subjecting a polyol (m) and a polyisocyanate (n) to a polyaddition reaction, and then subjecting the urethane prepolymer to an addition reaction with an active hydrogen group-containing (meth)acrylate (c).
- a urethanization catalyst may be used.
- the urethanization catalyst include metal compounds (organobismuth compounds, organotin compounds, organotitanium compounds, etc.) and quaternary ammonium salts.
- the polyfunctional (meth)acrylate (C) having a number average molecular weight of 500 to 40,000 may be a trifunctional or higher functional (meth)acrylate, such as urethane tetraacrylate.
- the photopolymerization initiator (D) is not limited as long as it generates radicals, ions, and the like when irradiated with active energy rays, thereby initiating a polymerization reaction of the monomers.
- a photopolymerization initiator that generates radicals when irradiated with active energy rays can be preferably used.
- Preferred examples of the photopolymerization initiator (D) include acylphosphine oxide compounds (D1), ⁇ -hydroxyalkylphenone compounds (D2), ⁇ -aminoalkylphenone compounds (D3), ketal compounds (D4), benzoylformate compounds (D5), thioxanthone compounds (D6), benzophenone compounds (D7), and oxime ester compounds (D8).
- Examples of the acylphosphine oxide compound (D1) include bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, and ethyl 2,4,6-trimethylbenzoylphenylphosphinate.
- ⁇ -Hydroxyalkylphenone compounds (D2) include 1-hydroxycyclohexyl phenyl ketone and 2-hydroxy-2-methyl-1-phenylpropan-1-one.
- Examples of ⁇ -aminoalkylphenone compounds (D3) include 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one, 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl]-butan-1-one, and 2-benzyl-2-(dimethylamino)-1-[4-(4-morpholinyl)phenyl]-butan-1-one.
- ketal compounds (D4) include benzyl dimethyl ketal.
- benzoyl formate compounds (D5) examples include methyl benzoyl formate, etc.
- Thioxanthone compounds (D6) include 2,4-diethylthioxanthone, 2-isopropylthioxanthone, and 2-chlorothioxanthone.
- benzophenone compounds (D7) include benzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, and 4,4'-bismethylaminobenzophenone.
- Examples of the oxime ester compound (D8) include 1-[4-(phenylthio)phenyl]-1,2-octanedione 2-(O-benzoyloxime) and 1-[6-(2-methylbenzoyl)-9-ethyl-9H-carbazol-3-yl]-ethanone-1-(O-acetyloxime).
- these photopolymerization initiators (D) may be used alone or in combination of two or more.
- the acylphosphine oxide compounds (D1) and ⁇ -hydroxyalkylphenone compounds (D2) are preferred from the viewpoints of curability and transmittance of the cured product, with the acylphosphine oxide compounds (D1) being more preferred, and bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide and 2,4,6-trimethylbenzoyldiphenylphosphine oxide being particularly preferred.
- the content of monofunctional monomer (A) in the present invention is 10 to 75% by weight based on the total weight of monofunctional monomer (A) and polyfunctional (meth)acrylate (C). If the content of monofunctional monomer (A) is less than 10% by weight, the elongation of the cured product will be insufficient, and if it exceeds 75% by weight, the elasticity of the cured product will be insufficient.
- the content of the monofunctional monomer (A1) having a homopolymer glass transition temperature of less than 25° C. is preferably 5 to 30% by weight, more preferably 5 to 25% by weight, based on the total content of the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C), from the viewpoints of curability and flexibility.
- the content of the monofunctional monomer (A2) having a homopolymer glass transition temperature of 25° C. or higher is preferably 5 to 70% by weight based on the total weight of the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C) from the viewpoints of curability and flexibility.
- the content of the polyfunctional (meth)acrylate (C) in the present invention is 25 to 90% by weight based on the total weight of the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C). If the content of the polyfunctional (meth)acrylate (C) is less than 25% by weight, the elasticity of the cured product is insufficient, and if it exceeds 90% by weight, the elongation percentage is insufficient.
- the content of the photopolymerization initiator (D) in the present invention is 0.1 to 20% by weight, preferably 2 to 20% by weight, more preferably 2 to 18% by weight, and even more preferably 5 to 15% by weight, based on the total weight of the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C). If the content of the photopolymerization initiator (D) is less than 0.1% by weight, the curability will be insufficient, and if it exceeds 20% by weight, the transmittance of the cured product will be insufficient.
- the molecular weight between crosslinking points in the present invention is 1000 to 25000.
- the molecular weight between crosslinking points is expressed as [Mc] (g/mol), and from the viewpoint of flexibility and restorability, it is preferably 1200 to 20000 g/mol, more preferably 1300 to 15000.
- the active energy ray-curable composition of the present invention may contain another monomer (M) other than the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C) having a number average molecular weight of 500 to 40,000, within a range that does not impair the effects of the present invention.
- the other monomer (M) include difunctional or higher functional (meth)acrylates other than the polyfunctional (meth)acrylate (C) [for example, difunctional (meth)acrylates (N) (excluding those corresponding to the polyfunctional (meth)acrylate (C)), trifunctional or higher functional (meth)acrylates (O), and (meth)acrylates having a phosphate group (P), etc.].
- the storage stability of the active energy ray-curable composition may become insufficient, and therefore it is preferable not to use such a monomer.
- Examples of the bifunctional (meth)acrylate (N) include polyalkylene glycol (alkylene group having 2 to 4 carbon atoms) di(meth)acrylate (N1), di(meth)acrylate (N2) of an alkylene oxide (alkylene group having 2 to 4 carbon atoms) adduct of a dihydric phenol compound, diester of an alkylene oxide (alkylene group having 2 to 4 carbon atoms) adduct of a polyhydric (preferably dihydric to octahydric) alcohol having 2 to 30 carbon atoms and (meth)acrylic acid, diester of a diglycidyl ether and (meth)acrylic acid, and di(meth)acrylate of an ethylene oxide adduct of fluorene, cyclohexanemethanol di(meth)acrylate, ethoxylated cyclohexanemethanol di(meth)acrylate, tricyclodecane dimethanol di(meth)acrylate, and 1,
- these bifunctional (meth)acrylates (N) may be used alone or in combination of two or more.
- trifunctional or higher (meth)acrylates (O) include trifunctional (meth)acrylate monomers and tetrafunctional or higher (meth)acrylate monomers.
- trifunctional (meth)acrylate monomers include trimethylolethane tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, trimethylolpropane modified with an alkylene oxide having 3 to 4 carbon atoms, pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, trimethylolpropane tri((meth)acryloyloxypropyl)ether, sorbitol tri(meth)acrylate, tri(meth)acrylate of an adduct of pentaerythritol with 1 to 30 moles of an alkylene oxide having 3 to 4 carbon atoms, and ethoxylated glycerin tri(meth)acrylate.
- tetrafunctional or higher (meth)acrylate monomers include pentaerythritol tetra(meth)acrylate, sorbitol tetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol propionate tetra(meth)acrylate, tetra(meth)acrylate of an adduct of pentaerythritol with 1 to 11 moles of an alkylene oxide having 3 to 4 carbon atoms, sorbitol penta(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, sorbitol hexa(meth)acrylate, and caprolactone-modified dipentaerythritol hexa(me
- the (meth)acrylate (P) having a phosphate group is not limited as long as it is a phosphate ester having a (meth)acryloyl group, and examples thereof include those having 1 to 3 functional groups in the (meth)acryloyl group.
- (meth)acrylates (P) having a phosphate group from the viewpoint of metal adhesion, preferred are (meth)acrylates having a phosphate group with a functionality of 1 to 2 (meth)acryloyl groups, and more preferred are 2-(meth)acryloyloxyethyl acid phosphate, bis ⁇ 2-(meth)acryloyloxyethyl ⁇ acid phosphate, and a reaction product of a 6-hexanolide addition polymer of 2-hydroxyethyl methacrylate and phosphoric anhydride.
- the content of the other monomer (M) is preferably 0 to 20% by weight, more preferably 0 to 10% by weight, based on the total weight of the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C).
- the total content of the polyfunctional (meth)acrylate (C) and the difunctional or higher (meth)acrylate other than the polyfunctional (meth)acrylate (C) is preferably 50% by weight or less based on the total weight of the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C) from the viewpoint of elongation.
- the active energy ray-curable composition of the present invention may contain various additives as necessary within the range that does not impair the effects of the present invention.
- the additives include leveling agents, charge adjusters, light stabilizers, ultraviolet absorbers, surface treatment agents, antioxidants, antiaging agents, crosslinking accelerators, plasticizers, preservatives, pH adjusters, antifoaming agents, and moisturizing agents.
- the method for producing the active energy ray-curable composition of the present invention is not particularly limited.
- the active energy ray-curable composition can be produced by stirring and mixing the above-mentioned components in a suitable container such as a glass beaker, a can, or a plastic cup with a stirring rod, a spatula, or the like, or by uniformly mixing the components with a known mixing device (a method using a mechanical stirrer, a magnetic stirrer, or the like, a mixing device equipped with a paddle-shaped stirring spring, a dissolver, a ball mill, a planetary mixer, or the like).
- a known mixing device a method using a mechanical stirrer, a magnetic stirrer, or the like, a mixing device equipped with a paddle-shaped stirring spring, a dissolver, a ball mill, a planetary mixer, or the like.
- the active energy ray-curable composition of the present invention is preferably in a liquid state at room temperature, and its viscosity can be measured using an E-type viscosity measuring device [such as "VISCOMETER TV-25L” manufactured by Toki Sangyo Co., Ltd.] and a B-type viscosity measuring device.
- E-type viscosity measuring device such as "VISCOMETER TV-25L” manufactured by Toki Sangyo Co., Ltd.
- the active energy ray-curable composition is applied to a substrate by a known method, and then cured by irradiating the composition with active energy rays.
- the active energy rays in the present invention include ultraviolet rays and electron beams.
- the active energy rays used for curing the active energy ray-curable composition of the present invention can be adjusted by selecting a photopolymerization initiator.
- the composition can be photocured by irradiation with active energy rays having a wavelength of 200 to 700 nm, and it is preferable that the composition is cured by irradiation with light (ultraviolet light) having a wavelength of 200 to 400 nm.
- LED light sources that emit ultraviolet rays include high-pressure mercury lamps, ultra-high-pressure mercury lamps, metal halide lamps, high-power metal halide lamps, etc. (Latest Trends in UV/EB Curing Technology, edited by RadTech Research Group, CMC Publishing, p. 138, 2006) and LEDs. Among them, LEDs consume less power and generate less ozone than other light sources, have low running costs, and are environmentally friendly.
- an LED light source ultraviolet irradiation device for example, LED light source ultraviolet irradiation device "FJ100 150x20 365, phoseon", manufactured by TECHNOLOGY Co., Ltd.] can be used.
- the amount of ultraviolet light irradiated when curing the active energy ray-curable composition of the present invention is preferably 10 to 10,000 mJ/cm 2 , more preferably 50 to 5,000 mJ/cm 2 , from the viewpoints of curability and flexibility of the cured product.
- a known electron beam irradiation device can be used.
- the irradiation dose of the electron beam is preferably 1 to 10 Mrad from the viewpoints of curability and suppression of deterioration of the cured product.
- the material to be applied to the active energy ray-curable composition of the present invention may be appropriately selected depending on the application, etc., and organic materials such as plastics and inorganic materials such as metals and glass can be used.
- organic materials such as plastics and inorganic materials such as metals and glass
- metals include steel, hot-dip galvanized steel, electrolytic galvanized steel, tinplate, tin-free steel, various other plated or alloy-plated steel, stainless steel, aluminum, gold, platinum, silver, copper, etc.
- the metals may be those that have been subjected to various surface treatments such as phosphate treatment, chromate treatment, organic phosphate treatment, organic chromate treatment, and heavy metal replacement treatment.
- plastic materials include polyester resins (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.), acrylic resins (methyl methacrylate copolymers, etc.), triacetyl cellulose, acrylonitrile-butadiene-styrene copolymer (ABS) resin, styrene resin, polysulfone resin, polyethersulfone resin, polycarbonate resin, vinyl chloride resin, polymethacrylimide resin, and polyolefin resins (polyethylene, polypropylene, cycloolefin polymer, etc.).
- Inorganic materials include glass and ceramics. Among these, the active energy ray-curable composition of the present invention has particularly excellent adhesion to metals.
- the active energy ray-curable composition of the present invention can be applied to a substrate by known coating methods such as spin coating, roll coating, and spray coating, and known printing methods such as lithographic printing, carton printing, metal printing, offset printing, screen printing, and gravure printing.
- coating methods such as spin coating, roll coating, and spray coating
- printing methods such as lithographic printing, carton printing, metal printing, offset printing, screen printing, and gravure printing.
- the composition of the present invention has a low viscosity at room temperature, it can also be applied to inkjet coating (inkjet printing) in which fine droplets are continuously ejected.
- inkjet printing is capable of precise, high-speed printing using relatively simple equipment, and is therefore suitable for use in the manufacture of display components such as liquid crystal displays and organic EL displays, as well as other electronic and optical components.
- the active energy ray curable composition of the present invention has a low viscosity, and the cured product of the active energy ray curable composition has excellent elongation and elastic modulus, making it useful as a material for various electronic and optical components, including display components.
- it can be suitably used for bonding and sealing electronic components such as display components and image sensors, and semiconductor packages. It can also be widely used in various coatings, inks (UV printing inks and UV inkjet printing inks, etc.), paints, etc.
- the present invention may include the following configurations.
- An active energy ray-curable composition containing a monofunctional monomer (A), a polyfunctional (meth)acrylate (C) having a number average molecular weight of 500 to 40,000, and a photopolymerization initiator (D), wherein the monofunctional monomer (A) contains a monofunctional monomer (A1) having a homopolymer glass transition temperature of less than 25° C. and a monofunctional monomer (A2) having a homopolymer glass transition temperature of 25° C.
- the content of the monofunctional monomer (A) is 10 to 75% by weight
- the content of the polyfunctional (meth)acrylate (C) is 25 to 90% by weight
- the content of the photopolymerization initiator (D) is 0.1 to 20% by weight, based on the total weight of the monofunctional monomer (A) and the polyfunctional (meth)acrylate (C), and the molecular weight between crosslinking points is 1,000 to 25,000.
- ⁇ 3> The active energy ray-curable composition according to ⁇ 1> or ⁇ 2>, wherein the monofunctional monomer (A2) is an N-substituted (meth)acrylamide.
- Examples 1 to 14 and Comparative Examples 1 to 5 ⁇ Preparation of active energy ray-curable composition> (Examples 1 to 14 and Comparative Examples 1 to 5)
- the monofunctional monomer (A), the polyfunctional (meth)acrylate (C) having a number average molecular weight of 500 to 40,000, the photopolymerization initiator (D), and the other monomer (M) were charged into a glass container and stirred until uniform, thereby obtaining active energy ray-curable compositions of Examples 1 to 14 and Comparative Examples 1 to 5.
- the raw materials used in Table 1 are as follows: (A1-1): Lauryl acrylate [product name: LA, manufactured by Osaka Organic Chemical Industry Co., Ltd.] (Tg of homopolymer: -30°C) (A1-2): Isostearyl acrylate [product name: ISTA, manufactured by Osaka Organic Chemical Industry Co., Ltd.] (Tg of homopolymer: -15°C) (A1-3): 2-[(butylamino)carbonyl]oxyethyl acrylate [product name: Viscoat #216, manufactured by Osaka Organic Chemical Industry Co., Ltd.] (Tg of homopolymer: 0° C.) (A1-4): Tetrahydrofurfuryl acrylate [product name: Viscoat #150, manufactured by Osaka Organic Chemical Industry Co., Ltd.] (Tg of homopolymer: -12°C) (A2-1): N-acryloylmorpholine [product name: ACMO, manufactured by KJ Chemicals] (Tg of
- the coating curability was evaluated according to the following criteria.
- the coating curability is preferably 2 or more, and more preferably 3.
- the film was exposed to light at an irradiation intensity of 200 mW/cm 2 under a nitrogen atmosphere using an LED light source ultraviolet irradiation device [model number "FJ100 150 ⁇ 20 385", manufactured by phoseon TECHNOLOGY Co., Ltd., irradiation wavelength 385 nm] to prepare an evaluation sample.
- the exposure amount was 2000 mJ/cm 2 .
- the prepared evaluation sample was kept at 25° C. for 30 minutes, and the total light transmittance (%) was measured in accordance with JIS K7136: 2000 using a total light transmittance measuring device [trade name "haze-garddual", manufactured by BYK Gardner Co., Ltd.].
- the total light transmittance is preferably 90% or more.
- a PET film [product name: Lumirror S, manufactured by Toray Industries, Inc.] was attached to a glass plate [product name: GLASS PLATE, manufactured by AS ONE Corporation, length 200 mm x width 200 mm x thickness 5 mm], and an active energy ray curable composition was applied using an applicator so that the film thickness after curing was 100 ⁇ m.
- ultraviolet ray irradiation device model number "VPS/I600", manufactured by Fusion UV Systems Co., Ltd.
- ultraviolet rays were irradiated at 2000 mJ/ cm2 under a nitrogen atmosphere to obtain a PET film covered with a cured product of the active energy ray curable composition.
- the PET film coated with the above-mentioned cured product was punched out into a dumbbell shape No. 3 in accordance with JIS K 6251:2017, and then the PET film was peeled off to obtain a test specimen for measurement.
- the elastic modulus is preferably 1000 MPa or less, more preferably 500 MPa or less, and even more preferably 100 MPa or less.
- the elongation is preferably 50% or more, and more preferably 100% or more.
- Recovery rate (%) (gauge line distance before test (20 mm))/(gauge line distance after test) ⁇ 100
- the restoration rate is preferably 80% or more, more preferably 90% or more, and even more preferably 95% or more.
- the average number of adhered grids is preferably 80 or more, more preferably 90 or more, and even more preferably 100.
- the active energy ray-curable composition of the present invention is excellent in both elongation and elastic modulus, and is therefore useful as a material for various electronic components, including display components such as flexible displays, stretchable devices, and various optical components.
- display components such as flexible displays, stretchable devices, and various optical components.
- it can be suitably used for adhesion and sealing of display components, electronic components such as image sensors, semiconductor packages, etc.
- coatings inks (UV printing inks, UV inkjet printing inks, screen printing inks, etc.), paints, etc.
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Abstract
Description
即ち本発明は、単官能モノマー(A)、数平均分子量が500~40000である多官能(メタ)アクリレート(C)及び光重合開始剤(D)を含有する活性エネルギー線硬化性組成物であって、前記単官能モノマー(A)がホモポリマーのガラス転移温度が25℃未満の単官能モノマー(A1)とホモポリマーのガラス転移温度が25℃以上の単官能モノマー(A2)を含有し、前記単官能モノマー(A)及び前記多官能(メタ)アクリレート(C)の合計重量に基づいて、前記単官能モノマー(A)の含有量が10~75重量%、前記多官能(メタ)アクリレート(C)の含有量が25~90重量%、前記光重合開始剤(D)の含有量が0.1~20重量%であり、架橋点間分子量が1000~25000である活性エネルギー線硬化性組成物;前記活性エネルギー線硬化性組成物を硬化させてなる硬化物である。
(1)光ラジカル重合開始剤として、1-ヒドロキシシクロヘキシルフェニルケトン[商品名「イルガキュア184」、IGM Resins B.V.社製]を、単官能モノマーに対して3重量%添加し、均一になるまで撹拌し、テストピース作製サンプルとする。
(2)厚さ1mmのシリコンゴムシート[商品名:シリコンゴムシート、アズワン(株)製]を幅10mm×長さ150mmに切ったもの2枚をガラス板[商品名:GLASS PLATE、アズワン(株)製、タテ200mm×ヨコ200mm×厚さ5mm]の両端に貼り付け、シリコンゴムシートの間にテストピース作製サンプルを約5gのせ、上から空気が入らないようにPETフィルム[商品名:ルミラーS、東レ(株)製]を被せ、更に上からガラス板を被せて積層体を作製する。
(3)(2)の積層体を25℃の環境下で紫外線照射装置(例えばフュージョンUVシステムズジャパン社製 VPS/I600、ランプ:Dバルブ)により、照度1500mW/cm2(UV-A)で1000mJ/cm2照射する。更に(2)の積層体を裏返して反対面から1000mJ/cm2で照射して、組成物を硬化させる。
(4)(3)の硬化したサンプルを縦幅40mm、横幅5mm、厚み1mmに切断し、テストピースとする。
このテストピースを用いて、動的粘弾性測定装置(例えば、Rheogel-E4000、UBM社製)により、以下の条件で動的粘弾性を測定する。
測定モード:温度依存性、測定温度範囲:-80℃~200℃、周波数:10Hz、昇温速度:4℃/分、歪み波形:正弦波、測定治具:引っ張り
得られたスペクトルの貯蔵弾性率E’に対する損失弾性率E”の比(tanδ)が最大値となる温度をガラス転移温度(Tg)とする。
本発明において、これらの炭素数10~22の直鎖又は分岐アルキル基を有する単官能(メタ)アクリレート(E)は、1種を単独で用いても、2種以上を併用してもよい。
単官能ウレタン(メタ)アクリレート(F)としては、水酸基を有する単官能(メタ)アクリレート(a)と有機モノイソシアネート化合物(b)との反応物等が挙げられる。
水酸基を有する単官能(メタ)アクリレート(a)は1種を単独で用いても、2種以上を併用してもよい。
脂肪族モノイソシアネート化合物(b1)としては、メチルイソシアネート、エチルイソシアネート、プロピルイソシアネート、イソプロピルイソシアネート、ブチルイソシアネート、ヘキシルイソシアネート、オクチルイソシアネート、ラウリルイソシアネート、テトラデシルイソシアネート、ヘキサデシルイソシアネート及びオクタデシルイソシアネート等が挙げられる。
脂環式モノイソシアネート化合物(b2)としては、シクロヘキシルイソシアネート等が挙げられる。
芳香族モノイソシアネート化合物(b3)としては、フェニルイソシアネート及びトリレンイソシアネート等が挙げられる。
有機モノイソシアネート化合物(b)は1種を単独で用いても、2種以上を併用してもよい。
本発明において、これらのその他の単官能(メタ)アクリレート(G)は、1種を単独で用いても、2種以上を併用してもよい。
本発明において、これらの脂環式骨格を有する(メタ)アクリレート(H)は、1種を単独で用いても、2種以上を併用してもよい。
N-置換ビニルモノマーとしては、N-ビニルピロリドン、N-ビニルカルバゾール、N-ビニルカプロラクタム、N-ビニルイミダゾール、ビニルメチルオキサゾリジノン等が挙げられる。
本発明において、N-置換(メタ)アクリルアミドとは、(メタ)アクリルアミドが有するアミノ基の水素原子のうち1個又は2個を炭化水素基等の置換基で置換したものを意味し、N-置換(メタ)アクリルアミドとしては、N-(メタ)アクリロイル基を有する鎖状アミド(I1)、N-(メタ)アクリロイル基を有する環状アミド(I2)、ダイアセトンアクリルアミド等が挙げられる。
本発明において、これらのN-置換(メタ)アクリルアミドは、1種を単独で用いても、2種以上を併用してもよい。
CH2=CXCO-O-(R-O)n-COCX=CH2 (1)
[一般式(1)中、nは2以上15以下の整数、Rは炭素数2以上6以下のアルキレン基(ただし1分子中にRが複数ある場合、Rは各々独立に炭素数2以上6以下のアルキレン基)、Xは各々独立に水素原子又はメチル基である。]
硬化物の硬度の観点からRは好ましくは炭素数2~3であり、更に好ましくはエチレン基及び1,2-プロピレン基である。
nは2以上15以下の整数であり、低アウトガス性及び耐折り曲げ性の観点から好ましくは7以上15以下の整数である。
これらの2官能(メタ)アクリレート(K)は、1種単独又は2種以上を併用できる。
これらのうち、硬化物の硬度の観点から好ましくは2官能アクリレートであり、特に好ましくは、ポリエチレングリコール(n=9)ジアクリレート、ポリエチレングリコール(n=14)ジアクリレート、ポリプロピレングリコール(n=7)ジアクリレート及びポリプロピレングリコール(n=12)ジアクリレートであり、最も好ましくはポリプロピレングリコール(n=7)ジアクリレート及びポリプロピレングリコール(n=12)ジアクリレートである。
ポリオール(m)は、1種を単独で用いても、2種以上を併用してもよい。
ポリイソシアネート(n)は、1種を単独で用いても、2種以上を併用してもよい。
水酸基含有(メタ)アクリレート(c1)としては、ヒドロキシアルキル(メタ)アクリレート(c11)及びポリアルキレングリコールモノ(メタ)アクリレート(c12)等が挙げられる。
活性水素基含有(メタ)アクリレート(c)は、1種を単独で用いても、2種以上を併用してもよい。
前記のウレタンジアクリレート(L3)は、1種を単独で用いてもよいし、2種以上を併用してもよい。
中でも、ポリオール(m)とポリイソシアネート(n)とを重付加反応させて、イソシアネート基を2個以上有するウレタンプレポリマーを製造した後に、活性水素基含有(メタ)アクリレート(c)を付加反応させて製造することが好ましい。
上記の重付加反応及び付加反応においては、ウレタン化触媒を用いても良い。
ウレタン化触媒としては、金属化合物(有機ビスマス化合物、有機スズ化合物及び有機チタン化合物等)及び4級アンモニウム塩等が挙げられる。
好ましい光重合開始剤(D)としては、アシルホスフィンオキサイド系化合物(D1)、α-ヒドロキシアルキルフェノン系化合物(D2)、α-アミノアルキルフェノン系化合物(D3)、ケタール系化合物(D4)、ベンゾイルホルメート系化合物(D5)、チオキサントン系化合物(D6)、ベンゾフェノン系化合物(D7)及びオキシムエステル系化合物(D8)等が挙げられる。
本発明において、これらの光重合開始剤(D)は1種を単独で用いても、2種以上を併用してもよい。
ホモポリマーのガラス転移温度が25℃以上の単官能モノマー(A2)の含有量は、単官能モノマー(A)及び多官能(メタ)アクリレート(C)の合計重量に基づいて、硬化性及び柔軟性の観点から、好ましくは5~70重量%である。
本発明における多官能(メタ)アクリレート(C)の含有量は、単官能モノマー(A)及び多官能(メタ)アクリレート(C)の合計重量に基づいて、25~90重量%である。多官能(メタ)アクリレート(C)の含有量が25重量%未満であると硬化物の伸縮性が不十分であり、90重量%を超えると伸び率が不十分となる。
[Mc]=1/{a0×(1/Mc0)+a1×(1/Mc1)+・・・+ai×(1/Mci)+・・・+an×(1/Mcn)} (1)
上記計算式(1)中、a0、a1、・・・ai、・・・anは、構成するモノマーの各成分(以下各成分と略記)の重量%を表す。
また、Mc0、Mc1、・・・Mci、・・・Mcnは、各成分毎の架橋点間分子量を表す。
なお、[Mci](g/mol)は下記計算式(2)により算出できる。
[Mci]=Mn/{2×(n-1)} (2)
上記計算式(2)中、Mnは、各成分の数平均分子量(g/mol)であり、nは各成分が有する(メタ)アクリロイル基の数(nは2以上)を表す。
その他のモノマー(M)としては、多官能(メタ)アクリレート(C)以外の2官能以上の(メタ)アクリレート[例えば、2官能(メタ)アクリレート(N)(多官能(メタ)アクリレート(C)に該当するものを除く)、3官能以上の(メタ)アクリレート(O)及びリン酸基を有する(メタ)アクリレート(P)等]が挙げられる。
なお、本発明においてビニルエーテル基及びN-ビニル基等のカチオン重合性基を有するモノマーを使用した場合、活性エネルギー線硬化性組成物の貯蔵安定性が不十分となる場合があるため、使用しないことが好ましい。
また、数平均分子量500未満である多官能(メタ)アクリレート(1,9-ノナンジオールジ(メタ)アクリレート等)も挙げられる。
本発明において、これらの3官能以上の(メタ)アクリレート(O)は1種を単独で用いても、2種以上を併用してもよい。
本発明において、これらのリン酸基を有する(メタ)アクリレート(P)は、1種を単独で用いても、2種以上を併用してもよい。
多官能(メタ)アクリレート(C)及び多官能(メタ)アクリレート(C)以外の2官能以上の(メタ)アクリレートの含有量の合計は、伸び性の観点から、単官能モノマー(A)及び多官能(メタ)アクリレート(C)の合計重量に基づいて、好ましくは50重量%以下である。
添加剤としては、レベリング剤、荷電調整剤、光安定化剤、紫外線吸収剤、表面処理剤、酸化防止剤、老化防止剤、架橋促進剤、可塑剤、防腐剤、pH調整剤、消泡剤及び保湿剤等が挙げられる。
なお、本発明の活性エネルギー線硬化性組成物は、室温で液状であることが好ましく、その粘度はE型粘度測定装置[東機産業社製「VISCOMETER TV-25L」等]及びB型粘度測定装置等を用いて測定することができる。
本発明の活性エネルギー線硬化性組成物の硬化に用いる活性エネルギー線は、光重合開始剤の選択により調整することができ、前記の光重合開始剤(D)を用いた場合には200~700nmの波長を有する活性エネルギー線の照射で光硬化でき、200~400nmの波長を持つ光(紫外線)の照射により硬化することが好ましい。
本発明の活性エネルギー線硬化性組成物を硬化するときの紫外線の照射量は、硬化性及び硬化物の可撓性の観点から好ましくは10~10,000mJ/cm2、更に好ましくは50~5,000mJ/cm2である。
前記の電子線を照射する場合、公知の電子線照射装置を使用することができる。電子線の照射量は、硬化性及び硬化物の劣化抑制の観点から好ましくは1~10Mradである。
金属としては、鋼、溶融亜鉛めっき鋼、電気亜鉛めっき鋼、ブリキ、ティンフリースチール、その他各種のめっきあるいは合金めっき鋼、ステンレス鋼、アルミニウム、金、白金、銀及び銅等が挙げられる。さらにはリン酸塩処理、クロメート処理、有機リン酸塩処理、有機クロメート処理及び重金属置換処理等、各種の表面処理を施したものであってもよい。
プラスチック材料としては、ポリエステル樹脂{ポリエチレンテレフタレート(PET)及びポリエチレンナフタレート(PEN)等}、アクリル樹脂(メチルメタクリレート共重合物等)、トリアセチルセルロース、アクリロニトリルーブタジエンースチレン共重合(ABS)樹脂、スチレン樹脂、ポリスルホン樹脂、ポリエーテルスルホン樹脂、ポリカーボネート樹脂、塩化ビニル樹脂、ポリメタクリルイミド樹脂及びポリオレフィン樹脂(ポリエチレン、ポリプロピレン及びシクロオレフィンポリマー等)等が挙げられる。
無機材料としては、ガラス及びセラミックス等が挙げられる。
本発明の活性エネルギー線硬化性組成物はこれらのうち、金属への密着性が特に優れる。
インクジェット印刷は比較的簡易な設備で精密かつ高速な印刷が可能であることから、液晶ディスプレイ及び有機ELディスプレイ等のディスプレイ用部品や、その他の電子部品及び光学部品の製造に好適に利用されている。
本発明は、以下の構成を含んでもよい。
<1>
単官能モノマー(A)、数平均分子量が500~40000である多官能(メタ)アクリレート(C)及び光重合開始剤(D)を含有する活性エネルギー線硬化性組成物であって、前記単官能モノマー(A)がホモポリマーのガラス転移温度が25℃未満の単官能モノマー(A1)とホモポリマーのガラス転移温度が25℃以上の単官能モノマー(A2)を含有し、前記単官能モノマー(A)及び前記多官能(メタ)アクリレート(C)の合計重量に基づいて、前記単官能モノマー(A)の含有量が10~75重量%、前記多官能(メタ)アクリレート(C)の含有量が25~90重量%、前記光重合開始剤(D)の含有量が0.1~20重量%であり、架橋点間分子量が1000~25000である活性エネルギー線硬化性組成物。
<2>
前記単官能モノマー(A2)が分子内に窒素原子を有する単官能モノマーである<1>に記載の活性エネルギー線硬化性組成物。
<3>
前記単官能モノマー(A2)がN-置換(メタ)アクリルアミドである<1>又は<2>に記載の活性エネルギー線硬化性組成物。
<4>
<1>~<3>のいずれかに記載の活性エネルギー線硬化性組成物を硬化させてなる硬化物。
反応容器にポリプロピレングリコール[商品名「サンニツクス PP-2000」、三洋化成工業(株)製、数平均分子量:2000]258重量部、MDI65重量部及びウレタン化触媒0.1重量部を仕込み、110℃で4時間反応させ、その後2-ヒドロキシエチルアクリレート33重量部を加え、80℃で8時間反応させて、ウレタン基を有する2官能アクリレート(C-4)を得た。(C-4)の数平均分子量は2700であった。
(実施例1~14及び比較例1~5)
表1の配合部数(重量部)に従い、ガラス製の容器に、単官能モノマー(A)、数平均分子量が500~40000である多官能(メタ)アクリレート(C)及び光重合開始剤(D)とその他のモノマー(M)とを仕込み、均一になるまで撹拌し、実施例1~14及び比較例1~5の活性エネルギー線硬化性組成物を得た。
(A1-1):ラウリルアクリレート[商品名:LA、大阪有機化学工業社製](ホモポリマーのTg:-30℃)
(A1-2):イソステアリルアクリレート[商品名:ISTA、大阪有機化学工業社製](ホモポリマーのTg:-15℃)
(A1-3):2-[(ブチルアミノ)カルボニル]オキシエチルアクリレート[商品名:ビスコート#216、大阪有機化学工業社製](ホモポリマーのTg:0℃)
(A1-4):テトラヒドロフルフリルアクリレート[商品名:ビスコート#150、大阪有機化学工業社製](ホモポリマーのTg:-12℃)
(A2-1):N-アクリロイルモルホリン[商品名:ACMO、KJケミカルズ社製](ホモポリマーのTg:145℃)
(A2-2):N,N-ジメチルアクリルアミド[商品名:DMAA、KJケミカルズ社製](ホモポリマーのTg:119℃)
(A2-3):イソボルニルアクリレート[商品名:ライトアクリレートIBXA、共栄社化学社製](ホモポリマーのTg:97℃)
(A2-4):環状トリメチロールプロパンホルマールアクリレート[商品名:ビスコート#200、大阪有機化学工業社製](ホモポリマーのTg:27℃)
(A2-5):ダイアセトンアクリルアミド[商品名:DAAM、KJケミカルズ社製](ホモポリマーのTg:77℃)
(C-1):ポリエチレングリコールジアクリレート(数平均分子量約1100)[商品名:NKエステル A-1000、新中村化学工業社製]
(C-2):ポリプロピレングリコールジアクリレート(数平均分子量約800)[商品名:NKエステル APG-700、新中村化学工業社製]
(C-3):シリコーンジアクリレート(数平均分子量約2500)[商品名:EBECRYL350、ダイセル・オルネクス社製]
(C-5):ウレタンジアクリレート(数平均分子量約18000)[商品名:UV-3000B、三菱ケミカル社製]
(C-6):ウレタンジアクリレート(数平均分子量約6500)[商品名:UN-6200、根上工業社製]
(C-7):ウレタンジアクリレート(数平均分子量約20000)[商品名:UN-7700、根上工業社製]
(C-8):ウレタンジアクリレート(数平均分子量約35000)[商品名:UF-C051、共栄社化学社製]
(C-9):ウレタンテトラアクリレート(数平均分子量約2000)[商品名:EBECRYL4513、ダイセル・オルネクス社製]
(M-1):2-ヒドロキシエチルメタクリレートの6-ヘキサノリド付加重合物と無水リン酸の反応生成物[商品名:KAYAMER PM-21、日本化薬社製]
(M-2):1,9-ノナンジオールジアクリレート[商品名:ビスコート#260、大阪有機化学工業社製]
(M-3):トリメチロールプロパントリアクリレート[商品名:ビスコート#295、大阪有機化学工業社製]
(D-1):(2,4,6-トリメチルベンゾイル)-ジフェニルホスフィンオキサイド[商品名:イルガキュアTPO、IGM Resins B.V.社製]
(D-2):ビス(2,4,6-トリメチルベンゾイル)-フェニルホスフィンオキサイド[商品名:イルガキュア819、IGM Resins B.V.社製]
(D-3):2,4,6-トリメチルベンゾイルフェニルホスフィン酸エチル[商品名:イルガキュアTPO―L、CHEMBRIDGE社製]
(D-4):1-ヒドロキシシクロヘキシルフェニルケトン[商品名:イルガキュア184、IGM Resins B.V.社製]
実施例1~14及び比較例1~5で得た各活性エネルギー線硬化性組成物を25℃で30分間温調し、E型粘度測定装置[東機産業社製「VISCOMETER TV-25L」]を用いて以下の条件で初期粘度(mPa・s)を測定した。
[測定条件]
コーンロータ :標準コーンロータ(1°34’×R24)
測定温度 :25℃
測定レンジ :M
回転数 :50rpm
実施例1~14及び比較例1~5で得た各活性エネルギー線硬化性組成物を、表面処理を施した厚さ100μmのPET(ポリエチレンテレフタレート)フィルム[東洋紡(株)製コスモシャインA4300]に、アプリケーターを用いて膜厚10μmとなるように塗布した。続いて、LED光源紫外線照射装置[型番「FJ100 150×20 385」、phoseon TECHNOLOGY(株)製、照射波長 385nm]を使用して窒素雰囲気下で照射強度200mW/cm2にて露光を行なった。露光量は1000mJ/cm2であった。硬化後塗膜の光照射直後及び光照射10秒後の硬化性を、指触することにより、タックの有無を確認した。
タックが有る場合は、さらに上記と同様に照射強度200mW/cm2にて露光を行ない(1回目と2回目の合計露光量:2000mJ/cm2)、光照射直後及び光照射10秒後の硬化性を、指触することにより、タックの有無を確認した。塗膜硬化性を下記基準で評価した。塗膜硬化性は2以上であることが好ましく、3であることがより好ましい。また、塗膜硬化性の評価が1の場合、硬化性が不十分であったため、続く硬化物の全光線透過率、弾性率、伸び率、復元率及び金属密着性の評価を行わなかった。
[評価基準]
3:露光量1000mJ/cm2でタックが無くなった。
2:合計露光量2000mJ/cm2でタックが無くなった。
1:合計露光量2000mJ/cm2でもタックあり。
実施例1~14、比較例1~2及び4~5で得た各活性エネルギー線硬化性組成物を、表面処理を施した厚さ100μmのPET(ポリエチレンテレフタレート)フィルム[東洋紡(株)製コスモシャインA4300]に、アプリケーターを用いて膜厚10μmとなるように塗布した。続いて、LED光源紫外線照射装置[型番「FJ100 150×20 385」、phoseon TECHNOLOGY(株)製、照射波長 385nm]を使用して窒素雰囲気下で照射強度200mW/cm2にて露光し、評価用サンプルを作製した。露光量は2000mJ/cm2であった。
作製した評価用サンプルを25℃で30分間温調し、JIS K7136:2000に準拠し、全光線透過率測定装置[商品名「haze-garddual」、BYK gardner(株)製]を用いて全光線透過率(%)を測定した。本発明では、全光線透過率が90%以上であることが好ましい。
<試験片の作製>
ガラス板[商品名:GLASS PLATE、アズワン(株)製、タテ200mm×ヨコ200mm×厚さ5mm]上に、PETフィルム[商品名:ルミラーS、東レ(株)製]を貼り付け、アプリケーターを用いて硬化後の膜厚が100μmとなるように活性エネルギー線硬化性組成物を塗布した。紫外線照射装置[型番「VPS/I600」、フュージョンUVシステムズ(株)製]により、窒素雰囲気下で紫外線を2000mJ/cm2照射し、活性エネルギー線硬化性組成物の硬化物で被覆されたPETフィルムを得た。
上記の硬化物で被覆されたPETフィルムをJIS K 6251:2017に準拠し、ダンベル状3号形に打ち抜き、その後PETフィルムを剥がすことにより、測定用試験片を得た。
<引張試験>
得られた測定用試験片を25℃、50%RHで5時間静置した後、JIS K 6251:2017に準拠し、オートグラフ[型番「AG-IS」(株)島津製作所製]を用いて引張試験を行い、弾性率及び伸び率を測定した。
[測定条件]
チャック間距離:20mm
標線間距離 :20mm
引張速度 :10mm/分
次に、下記式(2)で伸び率(%)を算出した。
伸び率(%)=(破断時の標線間距離-標線間距離)/(標線間距離)×100・・・(2)
弾性率は変位0.01~0.05mmの部分について解析を行った。
本発明では、弾性率が1000MPa以下であることが好ましく、500MPa以下であることがより好ましく、さらに好ましくは100MPa以下である。また、伸び率が50%以上であることが好ましく、100%以上であることがより好ましい。
<復元率>
得られた測定用試験片を25℃、50%RHで5時間静置した後、JIS K 6251:2017に準拠し、オートグラフ[型番「AG-IS」(株)島津製作所製]を用いて50%の伸びまで伸長し、つかみ具を0%の位置まで戻し1時間静置した後の復元率を算出した。
復元率(%)=(試験前の標線間距離(20mm))/(試験後の標線間距離)×100
なお、比較例1、4については、試験片が破壊したため、復元率を算出できなかった。
本発明では、復元率が80%以上であることが好ましく、90%以上であることがより好ましく、さらに好ましくは95%以上である。
実施例1~14、比較例1~2及び4~5で得た各活性エネルギー線硬化性組成物を、銅板(膜厚1mm)に、アプリケーターを用いて膜厚10μmとなるように塗布した。続いて、LED光源紫外線照射装置[型番「FJ100 150×20 385」、phoseon TECHNOLOGY(株)製、照射波長 385nm]を使用して照射強度200mW/cm2にて露光し、評価用サンプルを作製した。露光量は2000mJ/cm2であった。得られた評価用サンプルを23℃、相対湿度50%の環境下で24時間静置した後、基材上の硬化塗膜を2mm×2mmの碁盤目(100個)にクロスカットし、この上にセロハン粘着テープを張り付けて、90度剥離を行ない、基材からの硬化物の剥離状態を目視で観察した。1サンプルにつき2箇所の碁盤目を作製して評価し、硬化物が剥がれずに基材に密着しているマス目の個数の平均値を表1に示した。密着しているマス目の個数の平均値が80以上であることが好ましく、より好ましくは90以上であり、更に好ましくは100である。
Claims (4)
- 単官能モノマー(A)、数平均分子量が500~40000である多官能(メタ)アクリレート(C)及び光重合開始剤(D)を含有する活性エネルギー線硬化性組成物であって、前記単官能モノマー(A)がホモポリマーのガラス転移温度が25℃未満の単官能モノマー(A1)とホモポリマーのガラス転移温度が25℃以上の単官能モノマー(A2)を含有し、前記単官能モノマー(A)及び前記多官能(メタ)アクリレート(C)の合計重量に基づいて、前記単官能モノマー(A)の含有量が10~75重量%、前記多官能(メタ)アクリレート(C)の含有量が25~90重量%、前記光重合開始剤(D)の含有量が0.1~20重量%であり、架橋点間分子量が1000~25000である活性エネルギー線硬化性組成物。
- 前記単官能モノマー(A2)が分子内に窒素原子を有する単官能モノマーである請求項1に記載の活性エネルギー線硬化性組成物。
- 前記単官能モノマー(A2)がN-置換(メタ)アクリルアミドである請求項1に記載の活性エネルギー線硬化性組成物。
- 請求項1~3のいずれか1項に記載の活性エネルギー線硬化性組成物を硬化させてなる硬化物。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2016204597A (ja) * | 2015-04-28 | 2016-12-08 | Kjケミカルズ株式会社 | N−置換(メタ)アクリルアミドを用いた重合性組成物、その重合物及びそれらからなる成形品 |
| JP2017048288A (ja) * | 2015-09-01 | 2017-03-09 | Kjケミカルズ株式会社 | モデル材用活性エネルギー線硬化性樹脂組成物 |
| JP2021146657A (ja) * | 2020-03-23 | 2021-09-27 | 株式会社リコー | 立体造形用組成物、高分子量体、立体造形物、及び立体造形物の製造方法 |
| JP2022037903A (ja) * | 2020-08-25 | 2022-03-09 | 三洋化成工業株式会社 | 活性エネルギー線硬化性組成物及び硬化物 |
| JP2022153309A (ja) * | 2021-03-29 | 2022-10-12 | 三洋化成工業株式会社 | 活性エネルギー線硬化性組成物及びその硬化物 |
| JP2022164601A (ja) * | 2021-04-16 | 2022-10-27 | 三洋化成工業株式会社 | 紫外線硬化性組成物及び硬化物 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016204597A (ja) * | 2015-04-28 | 2016-12-08 | Kjケミカルズ株式会社 | N−置換(メタ)アクリルアミドを用いた重合性組成物、その重合物及びそれらからなる成形品 |
| JP2017048288A (ja) * | 2015-09-01 | 2017-03-09 | Kjケミカルズ株式会社 | モデル材用活性エネルギー線硬化性樹脂組成物 |
| JP2021146657A (ja) * | 2020-03-23 | 2021-09-27 | 株式会社リコー | 立体造形用組成物、高分子量体、立体造形物、及び立体造形物の製造方法 |
| JP2022037903A (ja) * | 2020-08-25 | 2022-03-09 | 三洋化成工業株式会社 | 活性エネルギー線硬化性組成物及び硬化物 |
| JP2022153309A (ja) * | 2021-03-29 | 2022-10-12 | 三洋化成工業株式会社 | 活性エネルギー線硬化性組成物及びその硬化物 |
| JP2022164601A (ja) * | 2021-04-16 | 2022-10-27 | 三洋化成工業株式会社 | 紫外線硬化性組成物及び硬化物 |
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| KR20250067923A (ko) | 2025-05-15 |
| JPWO2024095637A1 (ja) | 2024-05-10 |
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