WO2020262307A1 - 光硬化性組成物、ハードコート材、硬化物、硬化物付基材及び画像表示装置 - Google Patents
光硬化性組成物、ハードコート材、硬化物、硬化物付基材及び画像表示装置 Download PDFInfo
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- WO2020262307A1 WO2020262307A1 PCT/JP2020/024426 JP2020024426W WO2020262307A1 WO 2020262307 A1 WO2020262307 A1 WO 2020262307A1 JP 2020024426 W JP2020024426 W JP 2020024426W WO 2020262307 A1 WO2020262307 A1 WO 2020262307A1
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- WIPO (PCT)
- Prior art keywords
- meth
- cured product
- photocurable composition
- acrylate
- polymerizable
- Prior art date
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
Definitions
- the present invention relates to a photocurable composition, a hard coat material, a cured product, a substrate with a cured product, and an image display device.
- a glass base material is generally used as a member of the touch sensor of these image display devices.
- Image display devices are required to be thinner, lighter, and more flexible, and in order to satisfy these requirements, it is being considered to use a transparent base material.
- a base material having good optical characteristics often does not have sufficient scratch resistance by itself, and the occurrence of scratches on the surface of the base material in the manufacturing process of a touch sensor or the like tends to be a problem.
- Patent Document 1 Japanese Patent Document 1
- the hard coat layer is scratch resistant. It is required to further improve the sex.
- a main object of the present invention is a photocurable composition capable of forming a coat layer having excellent scratch resistance and antifouling property when used for forming a coat layer covering the surface of a base material. Is to provide.
- the photocurable composition according to one aspect of the present invention includes (A) a polyfunctional polymerizable compound having three or more polymerizable double bonds, (B) an acrylic resin having a polymerizable double bond, and (C) polymerizable. Includes a fluorine compound and (D) photopolymerization initiator.
- the double bond equivalent of the polyfunctional polymerizable compound may be 100 or more and 500 or less.
- the weight average molecular weight of the acrylic resin may be 4500 or more and 200,000 or less.
- the fluorine compound may be a perfluoroalkyl ether compound.
- the hard coat material according to one aspect of the present invention contains the above-mentioned photocurable composition.
- the cured product according to one aspect of the present invention is a cured product of the above-mentioned photocurable composition.
- the base material with a cured product according to one aspect of the present invention includes the above-mentioned cured product and a base material.
- the image display device according to one aspect of the present invention includes the above-mentioned cured product.
- a photocurable composition capable of forming a coat layer having excellent scratch resistance and antifouling property when used for forming a coat layer covering the surface of a base material. Can be done.
- (meth) acryloyl means methacryloyl or acryloyl.
- (meth) acrylate means methacryloyl or acryloyl.
- the photocurable composition for the hard coat material includes (A) a polyfunctional polymerizable compound having 3 or more polymerizable double bonds, (B) an acrylic resin having a polymerizable double bond, and (C). ) Polymerizable fluorine compound and (D) photopolymerization initiator.
- the polyfunctional polymerizable compound used as the component (A) has three or more polymerizable double bonds.
- Examples of the group containing a polymerizable double bond include a (meth) acryloyl group and a vinyl group.
- the number of polymerizable double bonds in the polyfunctional polymerizable compound may be 4 or more, 5 or more or 6 or more, and may be 12 or less, 11 or less or 10 or less.
- the term "polyfunctional" means having three or more polymerizable double bonds.
- the component (A) may have a monovalent group represented by the following formula (1) or (2) as a group containing a polymerizable double bond.
- the coating layer formed from the photocurable composition is coated while maintaining the high strength. The stress when the layer is deformed can be relieved. As a result, excellent flexibility of the coat layer can be obtained.
- the polyfunctional polymerizable compound has 3 or more polymerizable double bonds, the scratch resistance of the coat layer is improved. All of the polymerizable double bonds in the polyfunctional polymerizable compound may be contained in the group of the formula (1) or (2), or the component (A) is a group of the formula (1) or (2). Alternatively, it may have a group containing a polymerizable double bond.
- R 1 represents a hydrogen atom or a methyl group
- d represents an integer of 2 to 4
- e represents an integer of 1 to 6.
- R 1 represents a hydrogen atom or a methyl group
- m is 5, and n is an integer of 1 to 4.
- Examples of the component (A) include urethane (meth) acrylate, (meth) acrylic acid ester of alkylene oxide-modified polyhydric alcohol, and (meth) acrylic acid ester of caprolactone-modified polyhydric alcohol.
- urethane (meth) acrylate urethane (meth) acrylate
- acrylic acid ester of caprolactone-modified polyhydric alcohol By using the (meth) acrylic acid ester of urethane (meth) acrylate or caprolactone-modified polyhydric alcohol, it is possible to more easily form a protective film having excellent flexibility while maintaining high hardness.
- the polyfunctional polymerizable compound may be used alone or in combination of two or more.
- alkylene oxide modification means a compound having an oxyethylene group or a polyoxyethylene group formed by adding an alkylene oxide such as ethylene oxide to a hydroxy group of an alcohol compound.
- Ethylene oxide modification may be abbreviated as “EO modification”
- propylene oxide modification may be abbreviated as "PO modification”.
- the polyfunctional polymerizable compound derived from the alkylene oxide-modified polyhydric alcohol has a monovalent group of the formula (1).
- caprolactone modification means a compound having a divalent group formed by reacting a hydroxy group of an alcohol compound with caprolactone ( ⁇ -caprolactone or the like).
- the polyfunctional polymerizable compound derived from the caprolactone-modified polyhydric alcohol has a monovalent group represented by the formula (2-2).
- the (meth) acrylic acid ester of an alkylene oxide-modified or caprolactone-modified polyhydric alcohol is represented by, for example, the following formula (20). (HO) y- R 10- (O-Z) x (20)
- R 10 represents a residue of a polyhydric alcohol having 3 or more hydroxy groups (the portion excluding the hydroxy group), and Z is a monovalent group represented by the formula (1) or (2). Alternatively, it indicates a monovalent group having a polymerizable double bond other than these, x indicates an integer of 3 or more, y indicates an integer of 0 or more, and x + y is equal to the valence of R 10 .
- a plurality of Zs in one molecule may be the same or different, and one or more of the plurality of Zs is a monovalent group represented by the formula (2) or (2).
- x + y total number of hydroxy groups of the polyhydric alcohol
- x may be 3 to 9.
- Examples of the polyhydric alcohol corresponding to R 10 include at least one selected from the group consisting of polyglycerin, dipentaerythritol, pentaerythritol and trimethylolpropane.
- polyfunctional polymerizable compound examples include alkylene oxide-modified or caprolactone-modified dipentaerythritol hexa (meth) acrylate, alkylene oxide-modified or caprolactone-modified dipentaerythritol penta (meth) acrylate, alkylene oxide-modified or caprolactone-modified dipentaerythritol tetra.
- the double bond equivalent of the component (A) may be 100 or more and 500 or less, 110 or more and 300 or less, or 115 or more and 250 or less. As a result, a more excellent effect can be obtained in terms of scratch resistance of the cured film.
- the double bond equivalent of component (A) is defined by dividing the molecular weight of component (A) by the number of polymerizable double bonds in the same molecule.
- the photocurable composition contains 40 parts by mass or more and 95 parts by mass or less, 45 parts by mass or more and 93 parts by mass or less, or 50 parts by mass of the component (A) with respect to 100 parts by mass of the total amount of the components (A) and (B). It may contain more than 90 parts by mass and less than 90 parts by mass. When the amount of the component (A) is in this range, both scratch resistance and antifouling property can be achieved at a higher level.
- the component (A) may be used alone or in combination of two or more.
- Component (B) Acrylic resin having a polymerizable double bond
- the acrylic resin having a polymerizable double bond as a component (B) is, for example, bonded to a main chain composed of a copolymer containing (meth) acrylic acid ester as a monomer unit and a polymerizable double bond. May have a side chain containing. Side chains containing polymerizable double bonds typically include, but are not limited to, (meth) acryloyl groups.
- the component (B) is an acrylic resin having a structure different from that of the component (A) and the component (C).
- the component (B) is, for example, by copolymerizing one or more (meth) acrylic acid esters (a1) with one or more polymerizable compounds (a2) having a reactive functional group.
- Acrylic resin having a reactive functional group is obtained, and one or more compounds (b) having a functional group that reacts with the reactive functional group of this acrylic resin and a polymerizable double bond are used as the acrylic resin. It can be obtained by a method including reacting and introducing a polymerizable double bond into the side chain of the acrylic resin.
- the (meth) acrylic acid ester (a1) is, for example, a linear or branched alkyl (meth) acrylate, an alicyclic (meth) acrylate, an aromatic (meth) acrylate, an alkoxyalkyl (meth) acrylate, or an alkoxy (poly) alkylene. It may be at least one selected from the group consisting of glycol (meth) acrylate, alkoxyalkoxyalkyl (meth) acrylate, octafluoropentyl (meth) acrylate, and dialkylaminoalkyl (meth) acrylate.
- linear or branched alkyl (meth) acrylate examples include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, and t-.
- examples thereof include butyl (meth) acrylate, ethylhexyl (meth) acrylate, stearyl (meth) acrylate, lauryl (meth) acrylate, and tridecyl (meth) acrylate.
- Examples of the alicyclic (meth) acrylate include cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, and dicyclopentanyl (meth) acrylate.
- Examples of the aromatic (meth) acrylate include phenoxyethyl (meth) acrylate.
- alkoxy (poly) alkylene glycol (meth) acrylate examples include methoxydiethylene glycol (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, methoxytriethylene glycol (meth) acrylate, butoxytriethylene glycol (meth) acrylate, and methoxydi.
- alkoxyalkyl (meth) acrylate examples include ethoxyethyl (meth) acrylate and butoxyethyl (meth) acrylate.
- alkoxyalkoxyalkyl (meth) acrylate examples include 2-methoxyethoxyethyl (meth) acrylate and 2-ethoxyethoxyethyl (meth) acrylate.
- Examples of the octafluoropentyl (meth) acrylate include 1H, 1H, and 5H-octafluoropentyl (meth) acrylate.
- dialkylaminoalkyl (meth) acrylate examples include N, N-dimethylaminoethyl (meth) acrylate and N, N-diethylaminoethyl (meth) acrylate.
- the polymerizable compound (a2) may have one or more reactive functional groups selected from the group consisting of an epoxy group and a hydroxy group.
- the epoxy group and the hydroxy group are suitable because they have good reactivity with the compound (b) having a carboxyl group, an isocyanate group and the like.
- Examples of the polymerizable compound (a2) having an epoxy group as a reactive functional group include glycidyl (meth) acrylate and (meth) acrylate having an epoxy group such as 3,4-epoxycyclohexyl (meth) acrylate. ..
- Examples of the polymerizable compound (a2) having a hydroxy group as a reactive functional group include hydroxy such as 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, and 2-hydroxypropyl (meth) acrylate.
- Alkyl (meth) acrylate can be mentioned.
- the acrylic resin may contain other polymerizable compounds as a monomer unit in addition to the (meth) acrylic acid ester (a1) and the polymerizable compound (a2).
- examples of other polymerizable compounds include aromatic vinyl compounds such as styrene and vinyltoluene.
- the compound (b) having a polymerizable double bond is at least one selected from the group consisting of a carboxyl group, an isocyanate group, etc., which reacts with a reactive functional group (epoxy group, hydroxy group, etc.) of the polymerizable compound (a2).
- a reactive functional group epoxy group, hydroxy group, etc.
- the compound (b) having a carboxyl group examples include (meth) acrylic acid, a dimer of (meth) acrylic acid (for example, manufactured by Toa Synthetic Co., Ltd., trade name "Aronix M5600”), and caprolactone modification (meth). )
- Acrylic acid for example, ⁇ -carboxy-polycaprolactone monoacrylate, manufactured by Toa Synthetic Co., Ltd., trade name "Aronix M5300”
- a compound obtained by a ring-opening reaction between a (meth) acrylate having a hydroxy group and a carboxylic acid anhydride examples of the compound (b) having a carboxyl group.
- compound (b) having an isocyanate group examples include methacryloyloxyethyl isocyanate (for example, manufactured by Showa Denko KK, trade name "Karenzu MOI").
- the double bond equivalent of the component (B) may be 220 or more and 2500 or less, 230 or more and 1000 or less, or 240 or more and 500 or less.
- the double bond equivalent calculated by this formula can be regarded as corresponding to the average value of the double bond equivalents of the synthesized acrylic resin.
- the weight average molecular weight (Mw) of the component (B) may be 4500 or more and 200,000 or less, 4800 or more and 100,000 or less, or 5000 or more and 50,000 or less.
- Mw means a standard polystyrene-equivalent value measured by gel permeation chromatography.
- the photocurable composition contains 5 parts by mass or more and 60 parts by mass or less, 7 parts by mass or more and 55 parts by mass or less, or 10 parts by mass of the component (B) with respect to 100 parts by mass of the total amount of the components (A) and (B). It may be contained in a ratio of 5 parts by mass or more and 50 parts by mass or less. When the amount of the component (B) is in this range, both scratch resistance and antifouling property can be achieved at a higher level.
- the component (B) may be used alone or in combination of two or more.
- Component (C) Polymerizable fluorine compound
- the polymerizable fluorine compound as the component (C) may have a group having a polymerizable double bond and a perfluoroether group.
- Examples of the group having a polymerizable double bond include a (meth) acryloyl group and a vinyl group.
- the perfluoroether group may be, for example,-(OC 4 F 8 ) a- (OC 3 F 6 ) b- (OC 2 F 4 ) c- (OCF 2 ) d- , a, b, c.
- And d are independently 0 to 200, and the sum of a, b, c, and d is 1 or more.
- the sum of a, b, c and d may be 5 to 300, 10 to 200, or 10 to 100.
- Examples of the component (C) include a perfluoropolyether compound having a (meth) acryloyl group.
- the polymerizable fluorine compound according to the present embodiment has a polymerizable double bond, it is easily compatible with the components (A) and (B) and improves the adhesion of the cured film to the non-fluorine-based substrate. be able to. Further, since the perfluoro groups are easily distributed near the surface of the cured film on the side not in contact with the substrate, the scratch resistance and antifouling property of the cured film can be improved.
- the polymerizable fluorine compound may further have a group having an active hydrogen such as a hydroxy group.
- the photocurable composition contains 0.1 parts by mass or more and 10 parts by mass or less of the component (C) and 0.2 parts by mass or more and 8 parts by mass with respect to 100 parts by mass of the total amount of the components (A) and (B). It may be contained below, or in a ratio of 0.5 parts by mass or more and 5 parts by mass or less. When the amount of the component (C) is in this range, both scratch resistance and antifouling property can be achieved at a higher level.
- the component (C) may be used alone or in combination of two or more.
- the photopolymerization initiator as the component (D) is a compound that initiates photopolymerization by generating radicals by irradiation with active rays such as ultraviolet rays.
- Examples of the photopolymerization initiator include 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, 4-t-butyl-trichloroacetophenone, diethoxyacetophenone, 2-hydroxy-2-methyl-2-phenylpropane-.
- Benzophenone-based photopolymerization initiators and thioxanthone, 2-chlorthioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropyl
- thioxanthone-based photopolymerization initiators such as thioxanthone.
- the photocurable composition contains 0.01 parts by mass or more and 10 parts by mass or less and 0.1 parts by mass or more and 6 parts by mass with respect to 100 parts by mass of the total amount of the components (A) and (B). It may be contained below, or in a ratio of 1 part by mass or more and 5 parts by mass or less. When the amount of the photopolymerizable compound is in this range, particularly good photopolymerizability can be obtained.
- the component (D) may be used alone or in combination of two or more.
- the photocurable composition may further contain a solvent that dissolves or disperses the components (A) to (D) for the purpose of adjusting the viscosity, coatability, thickness of the coating film, and the like.
- the solvent examples include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone and cyclohexanone; esters such as ethyl acetate and butyl acetate; alcohols such as isopropyl alcohol and ethyl alcohol; ethylene glycol monoethyl ether and ethylene glycol mono.
- Polyhydric alcohol alkyl ethers such as butyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, propylene glycol monomethyl ether, propylene glycol dimethyl ether, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether; benzene, toluene, xylene, methoxybenzene, 1, 2 -Aromatic hydrocarbons such as dimethoxybenzene; halogenated hydrocarbons such as chloroform, dichloromethane, dichloroethane, tetrachloroethane, trichloroethylene, tetrachloroethylene and chlorobenzene can be mentioned.
- the solvent may be used alone or in combination of two or more.
- the photocurable composition may further contain components other than the components (A) to (D) as long as the gist of the present invention is not deviated.
- the photocurable composition may contain inorganic fine particles in order to adjust optical properties such as refractive index or enhance antiblocking property.
- the average particle size of the inorganic fine particles may be 1 to 1000 nm or 5 to 200 nm.
- examples of the inorganic fine particles include silicon dioxide particles, tin oxide particles, calcium carbonate particles, zirconium oxide particles, talc, kaolin, barium sulfate particles, titanium dioxide particles, aluminum oxide particles and calcium sulfate particles.
- the inorganic fine particles may be surface-treated.
- the photocurable composition may further contain additives such as antifouling agents, flame retardants, antioxidants, dispersants, ultraviolet absorbers, pigments, plasticizers, surfactants, thixotropy agents and the like.
- additives such as antifouling agents, flame retardants, antioxidants, dispersants, ultraviolet absorbers, pigments, plasticizers, surfactants, thixotropy agents and the like.
- the photocurable composition according to the present embodiment can be used as a hard coat material for forming a hard coat layer covering the surface of a base material to obtain a hard coat film.
- the hard coat material of the present embodiment contains the above-mentioned photocurable composition, and the hard coat film is composed of a base material and a coat layer.
- the base material any base material such as metal, glass, and plastic can be used.
- the base material is preferably a plastic film base material from the viewpoint of adhesion.
- plastic film base material examples include polyethylene terephthalate (PET), triacetyl cellulose (TAC), polyethylene naphthalate (PEN), polymethyl methacrylate (PMMA), polycarbonate (PC), polyimide (PI), and polyethylene (PE).
- PET polyethylene terephthalate
- TAC triacetyl cellulose
- PEN polyethylene naphthalate
- PMMA polymethyl methacrylate
- PC polycarbonate
- PI polyimide
- PE polyethylene
- PE Polypropylene
- PP Polyethylene alcohol
- PVC Polyvinyl chloride
- COC Cycloolefin copolymer
- COP Cycloolefin polymer
- Norbornene resin containing Polyethersulfone, Cellophane, Aromatic polyamide, and their A combination of films can be mentioned.
- the plastic film base material may be subjected to surface treatment such as corona treatment or plasma treatment, or an undercoating agent (primer) may be applied to the plastic film base material.
- surface treatment such as corona treatment or plasma treatment
- an undercoating agent primer
- the thickness of the plastic film base material is not particularly limited, but may be, for example, 10 to 300 ⁇ m, 40 to 200 ⁇ m, or 60 to 150 ⁇ m.
- the thickness of the coat layer may be, for example, 0.5 to 50 ⁇ m, 1 to 30 ⁇ m, or 5 to 20 ⁇ m.
- the coat layer may be provided on one side of the plastic film base material, or may be provided on both sides of the plastic film base material.
- the coat layer may cover the entire surface of the plastic film base material or may partially cover the surface. Some layer (primer layer or the like) may be provided between the coat layer and the plastic base material.
- the hard coat film is, for example, a step of forming a film of a photocurable composition on a plastic film, and after removing a solvent from the film of the photocurable composition if necessary, it is photocured by an active energy ray or the like. It can be produced by a method including a step of curing the sex composition to form a cured film of the photocurable composition as a coat layer.
- a normal coating method or a printing method can be applied.
- a coating method or printing method for example, reverse coating, transfer roll coating, gravure roll coating, kiss coating, cast coating, spray coating, spin coating, dip coating, slot orifice coating, air doctor coating, bar coating, blade coating, etc.
- Printing including dumb coating, coating such as die coating, intaglio printing such as gravure printing, and stencil printing such as screen printing can be used.
- the active energy ray for curing the photocurable composition ultraviolet rays, electron beams, etc. can be used.
- the curable composition may be cured by heating.
- the photocurable composition may contain a thermal radical polymerization initiator.
- the cured film (coating layer) formed from the photocurable composition according to the present embodiment has excellent scratch resistance.
- the scratch resistance is determined by, for example, a method of visually confirming scratches on the surface of the coat layer when the steel wool is reciprocated while pressing # 0000 steel wool against the surface of the coat layer with a predetermined load. Can be evaluated. Scratch resistance can be quantified based on the maximum value of the load where no scratches were found on the surface when the load was increased stepwise. This maximum value may be 1000 gf or more, 1500 gf or more, or 2000 gf or more in order to prevent the film surface from being scratched in the manufacturing process of an image display device such as a touch panel.
- the curable composition according to the present embodiment it is possible to form a coat layer having such excellent scratch resistance.
- the upper limit of the scratch resistance value is not particularly limited, but is usually 2500 gf or less.
- the surface of the cured film according to the present embodiment has excellent scratch resistance, it has high water repellency and oil repellency, and is hard to get dirty.
- the water contact angle of the cured film measured in terms of scratch resistance is preferably 100 ° or more, more preferably 105 ° or more at 23 ° C.
- the cured film according to the present embodiment preferably contains fluorine on the outermost surface and inside of the cured film.
- the atomic ratio of fluorine on the outermost surface of the cured film may be 3 atmic% or more, 5 atmic% or more, 10 atmic% or more, or 12 atmic% or more from the viewpoint of enhancing water repellency.
- the upper limit of the atomic ratio of fluorine on the outermost surface of the cured film may be 50 atmic% or less.
- the atomic ratio of fluorine in the middle part of the cured film is 1 atmic% or less, 0.5 atmic% or less, 0.3 atmic% or less, 0.2 atmic% or less, or 0.1 atmic from the viewpoint of scratch resistance and appearance of the cured film.
- the lower limit of the atomic ratio of fluorine in the intermediate portion of the cured film may be 0.001 atmic% or more.
- the atomic ratio of fluorine can be measured using an X-ray photoelectron spectrometer. When the fluorine content on the outermost surface of the cured film is 3 atmic% or more and the fluorine content in the middle part of the cured film is 1 atmic% or less, water repellency, scratch resistance and appearance of the cured film are compatible at a high level. it can.
- the cured product according to the present embodiment can be formed by curing the photocurable composition by using active energy rays such as ultraviolet rays and electron beams, and may be further cured by heating.
- the cured product according to the present embodiment may be, for example, a cured film.
- the base material with a cured product according to the present embodiment includes the above-mentioned cured product and the base material.
- the base material can be applied in the same manner as those described above, and is preferably a plastic film base material from the viewpoint of adhesion.
- the substrate with a cured product according to the present embodiment can be suitably used as, for example, a hard coat film.
- the image display device includes the above-mentioned cured product.
- Examples of the image display device include a plasma display (PDP), a liquid crystal display (LCD), a cathode ray tube (CRT), a field emission display (FED), an organic EL display (OELD), a 3D display, and electronic paper (EP). Can be mentioned.
- A1 10 functional urethane acrylate (double bond equivalent: 116, manufactured by Hitachi Kasei Co., Ltd., trade name "Hitaroid 7909-1")
- A2 6-functional urethane acrylate (double bond equivalent: 123, manufactured by Hitachi Kasei Co., Ltd., trade name "Hitaroid 7902-1”)
- A3 Caprolactone-modified dipentaerythritol hexaacrylate (double bond equivalent: 135, caprolactone 2 mol added, hexafunctional, manufactured by Nippon Kayaku Co., Ltd., trade name "KAYARAD DPCA-20”)
- an acrylic resin having the following polymerizable double bond was synthesized.
- Mw is a value obtained by converting with a standard polystyrene calibration curve measured by a gel permeation chromatography (GPC) method.
- the measurement conditions of the GPC method are as follows.
- C Perfluoropolyether compound having a (meth) acryloyl group (manufactured by Daikin Corporation, trade name "Optur DAC-HP")
- C2 Perfluoropolyether compound having a (meth) acryloyl group (manufactured by DIC Corporation, trade name "Megafuck RS-75")
- C3 Perfluoropolyether compound having (meth) acryloyl group (Solvay Specialty Polymers Japan Co., Ltd., trade name "Fluoroink AD-1700")
- C4 Perfluoropolyether compound having (meth) acryloyl group (Solvay Specialty Polymers Japan Co., Ltd., trade name "Fluoroink MD-700”)
- D1 1-Hydroxycyclohexylphenyl ketone (Omnirad 184 manufactured by IGM Resins BV)
- a PET film having a thickness of 100 ⁇ m (manufactured by Toyobo Co., Ltd., trade name “Cosmo Shine A4300)” and a PC film having a thickness of 100 ⁇ m (manufactured by Mitsubishi Gas Chemical Company, Inc., trade name “Iupilon FE2000”) were prepared.
- the photocurable composition was applied onto one side of the substrate using a bar coater and dried in a hot air dryer at 80 ° C. for 1 minute to form a coating film having a thickness of 10 ⁇ m.
- a cured film was formed as a coating layer covering one side of the substrate.
- nitrogen was introduced to reduce the oxygen concentration to 10 ppm or less.
- Contact angle Water was dropped on the surface of the coat layer and the contact angle of water was measured.
- a contact angle meter manufactured by Kyowa Surface Chemistry Co., Ltd., trade name: Drop Master 300
- the measurement conditions were a temperature of 23 ° C., an appropriate amount of the probe liquid of 2 ⁇ L, and a measurement timing of 5 seconds after the probe liquid was adjusted.
- the contact angle was measured before and after the scratch resistance test.
- a contact angle of 105 ° or more was judged as "A”
- a contact angle of 100 ° or more and less than 105 ° was judged as "B”
- a contact angle of less than 100 ° was judged as "C”.
- X-ray Al-K ⁇ ray (100 ⁇ m, 14 W, 12 kV) Measurement area: diameter 150 ⁇ m Pass Energy: 50 eV, Step Energy: 0.1 eV Argon gas cluster Ion beam Etching conditions: Ion energy 4000 eV, Cluster size: Large, Irradiation range: Diameter 1.64 mm
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Abstract
Description
本実施形態に係るハードコート材用の光硬化性組成物は、(A)重合性二重結合を3以上有する多官能重合性化合物、(B)重合性二重結合を有するアクリル樹脂、(C)重合性フッ素化合物、及び(D)光重合開始剤を含む。
(A)成分として用いられる多官能重合性化合物は、重合性二重結合を3以上有する。重合性二重結合を含む基としては、例えば、(メタ)アクリロイル基及びビニル基が挙げられる。多官能重合性化合物中の重合性二重結合の数は、4以上、5以上又は6以上であってよく、12以下、11以下又は10以下であってよい。本明細書における「多官能」とは、重合性二重結合を3以上有することを意味する。
(HO)y-R10-(O-Z)x (20)
(B)成分である重合性二重結合を有するアクリル樹脂は、例えば、(メタ)アクリル酸エステルをモノマー単位として含む共重合体からなる主鎖と、主鎖に結合し、重合性二重結合を含む側鎖とを有してよい。重合性二重結合を含む側鎖は、典型的には(メタ)アクリロイル基を含むが、これに限られない。(B)成分は、(A)成分及び(C)成分と異なる構造を有するアクリル樹脂である。
(C)成分である重合性フッ素化合物は、重合性二重結合を有する基と、パーフルオロエテール基とを有してよい。
(D)成分である光重合開始剤は、紫外線等の活性光線の照射によってラジカルを発生することで、光重合を開始させる化合物である。光重合開始剤としては、例えば、4-フェノキシジクロロアセトフェノン、4-t-ブチル-ジクロロアセトフェノン、4-t-ブチル-トリクロロアセトフェノン、ジエトキシアセトフェノン、2-ヒドロキシ-2-メチル-2-フェニルプロパン-2-オン、2-(4-イソプロピルフェニル-2-ヒドロキシ-2-メチルプロパン-2-オン、2-(4-ドデシルフェニル)-2-ヒドロキシ-2-メチルプロパン-2-オン、4-(2-ヒドロキシエトキシ)-フェニル-(2-ヒドロキシ-2-プロピル)ケトン、1-ヒドロキシシクロヘキシルフェニルケトン、2-メチル-2-[4-(メチルチオ)フェニル]-2-モルホリノプロパン-2等のアルキルフェノン系光重合開始剤;ベンゾイン、ベンゾインメチルエ-テル、ベンゾインエチルエ-テル、ベンゾインイソプロピルエ-テル、ベンゾインイソブチルエ-テル、及びベンジルジメチルケタ-ル等のベンゾイン系光重合開始剤;ベンゾフェノン、4-メチルベンゾフェノン、2-メチルベンゾフェノン、ベンゾイル安息香酸、ベンゾイル安息香酸メチル、4-フェニルベンゾフェノン、ヒドロキシベンゾフェノン、4-ベンゾイル-4’-メチルジフェニルサルファイド、3、3’-ジメチル-4-メトキシベンゾフェノン等のベンゾフェノン系光重合開始剤;及びチオキサントン、2-クロルチオキサントン、2-メチルチオキサントン、2,4-ジメチルチオキサントン、イソプロピルチオキサントン、2,4-ジクロロチオキサントン、2,4-ジエチルチオキサントン、2,4-ジイソプロピルチオキサントン等のチオキサントン系光重合開始剤が挙げられる。
本実施形態に係る光硬化性組成物は、基材の表面を覆うハードコート層を形成して、ハードコートフィルムを得るためのハードコート材として用いることができる。本実施形態のハードコート材は、上述した光硬化性組成物を含有する、ハードコートフィルムは、基材及びコート層から構成される。
本実施形態に係る硬化物は、光硬化性組成物を紫外線、電子線等の活性エネルギー線を使用することで硬化させて形成することができ、更に加熱により硬化させてもよい。本実施形態に係る硬化物は、例えば硬化膜であってよい。
A1:10官能ウレタンアクリレート(二重結合当量:116、日立化成株式会社製、商品名「ヒタロイド7909-1」)
A2:6官能ウレタンアクリレート(二重結合当量:123、日立化成株式会社製、商品名「ヒタロイド7902-1」)
A3:カプロラクトン変性ジペンタエリスリトールヘキサアクリレート(二重結合当量:135、カプロラクトン2モル付加、6官能、日本化薬株式会社製、商品名「KAYARAD DPCA-20」)
グリシジルメタクリレート(GMA)80質量部、メチルメタクリレート(MMA)18質量部、及びエチルアクリレート(EA)2質量部を、プロピレングリコールモノメチルエーテル(MIBK)中で常法に従って溶液重合させて、グリシジルメタクリレートに由来するエポキシ基を有するアクリル樹脂を合成した。得られたアクリル樹脂のエポキシ基とアクリル酸との反応により、アクリロイル基を有するアクリル樹脂を得た。重合反応に用いたGMA1当量に対して、1当量のアクリル酸を反応に用いた。得られたアクリル樹脂(B1)のMwは15000であり、二重結合当量は256であった。
溶液重合の時間を変更した以外は、合成例B1と同様にして、Mwが5000のアクリル樹脂(B2)を得た。
溶液重合の時間を変更した以外は、合成例B1と同様にして、Mwが50000のアクリル樹脂(B3)を得た。
装置:東ソー株式会社製 HLC-8320GPC(RI検出器内蔵)
検出器:RI(示差屈折計)
溶媒:テトラヒドロフラン
ガードカラム:TSK-guardcolumn SuperMP(HZ)-H(1本)
ガードカラムサイズ:4.6mm(ID)×20mm
カラム:東ソー株式会社製 TSK-GEL SuperMulitipore HZ-H(3本連結)
カラムサイズ:4.6mm(ID)×150mm
温度:40℃
試料濃度:0.01g/5mL
注入量:10μL
流量:0.35mL/分
C1:(メタ)アクリロイル基を有するパーフルオロポリエーテル化合物(ダイキン株式会社製、商品名「オプツールDAC-HP」)
C2):(メタ)アクリロイル基を有するパーフルオロポリエーテル化合物(DIC株式会社製、商品名「メガファックRS-75」)
C3:(メタ)アクリロイル基を有するパーフルオロポリエーテル化合物(ソルベイスペシャリティポリマーズジャパン株式会社、商品名「フルオロインク AD-1700」)
C4:(メタ)アクリロイル基を有するパーフルオロポリエーテル化合物(ソルベイスペシャリティポリマーズジャパン株式会社、商品名「フルオロインク MD-700」)
D1:1-ヒドロキシシクロヘキシルフェニルケトン(IGM Resins B.V.製 Omnirad184)
(A)~(D)成分を表1又は表2に示す配合量(質量部)で、プロピレングリコールモノメチルエーテル150質量部と混合し、40℃で1時間攪拌して、実施例及び比較例の光硬化性組成物をそれぞれ調製した。
基材として、厚さ100μmのPETフィルム(東洋紡株式会社製、商品名「コスモシャイン A4300)と、厚さ100μmのPCフィルム(三菱ガス化学株式会社製、商品名「ユーピロン FE2000」)を準備した。バーコーターを用いて光硬化性組成物を基材の片面上に塗布し、80℃の熱風式乾燥機中で1分間乾燥して厚さ10μmの塗膜を形成した。コンベア式高圧水銀ランプを用いて400mJ/cm2の光量の紫外線を塗膜に照射して光硬化性組成物を硬化させることで、基材の片面を覆うコート層として硬化膜を形成させた。紫外線照射の際は、窒素を導入して酸素濃度を10ppm以下とした。
表面性測定機(新東科学株式会社製、HEIDON TYPE:14FW)を用いてコート層の表面に対して、所定の荷重で#0000スチールウールを押し付けながら、スチールウールを2000mm/分の速度で20mmの距離を1000往復させた。その後、コート層表面の傷つきの状態を目視にて確認した。傷が確認されなかった荷重の最大値が、2000gf以上を「A」、1000gf以上2000gf未満を「B」、1000gf未満を「C」と判断した。
コート層の表面に対して水を滴下して水の接触角を測定した。測定には、接触角計(協和界面化学株式会社製、商品名:Drop Master300)を用いた。測定条件は、温度を23℃とし、プローブ液体の液適量を2μLとし、測定タイミングをプローブの液適下後5秒とした。接触角の測定は、耐擦傷性試験の前後で行った。接触角が105°以上を「A」、100°以上105°未満を「B」、100°未満を「C」と判断した。
完全自動X線光電子分光装置(サーモフィッシャーサイエンティフィック株式会社製、商品名:Thermo Scientific K-Alpha)を用い、アルゴンガスクラスターイオンビーム(Ar-GCIB)エッチング/X線光電子分光法(XPS)で、硬化膜を構成する全原子に対するフッ素原子の厚み方向の原子比を測定した。測定条件は、以下のとおりである。
X線:Al-Kα線(100μm、14W、12kV)
測定面積:直径150μm
Pass Energy:50eV、Step Energy:0.1eV
アルゴンガスクラスターイオンビームエッチング条件:イオンエネルギー4000eV、クラスターサイズ:Large、照射範囲:直径1.64mm
Claims (9)
- (A)重合性二重結合を3以上有する多官能重合性化合物、(B)重合性二重結合を有するアクリル樹脂、(C)重合性フッ素化合物、及び(D)光重合開始剤を含む、ハードコート材用の光硬化性組成物。
- 前記多官能重合性化合物の二重結合当量が、100以上500以下である、請求項1に記載の光硬化性組成物。
- 前記アクリル樹脂の重量平均分子量が、4500以上200000以下である、請求項1又は2に記載の光硬化性組成物。
- 前記重合性フッ素化合物が、(メタ)アクリロイル基を有するパーフルオロポリエーテル化合物である、請求項1~3のいずれか一項に記載の光硬化性組成物。
- 請求項1~4のいずれか一項に記載の光硬化性組成物を含有する、ハードコート材。
- 請求項1~4のいずれか一項に記載の光硬化性組成物の硬化物。
- 前記硬化物の最表面におけるフッ素の原子比が3atmic%以上であり、前記硬化物の中間部におけるフッ素の原子比が1atmic%以下である、請求項6に記載の硬化物。
- 請求項6又は7に記載の硬化物と、基材とを備える、硬化物付基材。
- 請求項6~7のいずれか一項に記載の硬化物を備える、画像表示装置。
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CN116836621A (zh) | 2023-10-03 |
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