WO2017150422A1 - ハードコート剤及び積層フィルム - Google Patents
ハードコート剤及び積層フィルム Download PDFInfo
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- WO2017150422A1 WO2017150422A1 PCT/JP2017/007381 JP2017007381W WO2017150422A1 WO 2017150422 A1 WO2017150422 A1 WO 2017150422A1 JP 2017007381 W JP2017007381 W JP 2017007381W WO 2017150422 A1 WO2017150422 A1 WO 2017150422A1
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- hard coat
- reactive functional
- hard coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Definitions
- the present invention relates to a hard coat agent that can efficiently form a hard coat layer having high hardness and excellent scratch resistance and flex resistance, and a laminated film having a hard coat layer formed using this hard coat agent About.
- display devices such as various displays have a touch panel and are increasingly used as data input devices.
- a pen or a finger is usually brought into contact with the surface of the touch panel. Therefore, the surface of the touch panel is required not to be damaged even if contact with a pen or a finger is repeated. For this reason, conventionally, providing the hard-coat layer in the resin film which comprises a touchscreen has been performed.
- Patent Document 1 describes a resin composition for forming a transparent coating layer containing an organosilicon compound having a reactive functional group and a polythiol compound, and a method for forming a transparent coating using this resin composition. Has been. This document also describes that a transparent film formed using the resin composition is excellent in flexibility, hardness, scratch resistance, and wear resistance.
- Patent Document 1 describes that the transparent film is excellent in flexibility, hardness, scratch resistance, wear resistance, and the like.
- it is necessary to sufficiently cure the resin composition, and depending on the curing conditions, it may not be possible to form a transparent film having the desired performance.
- the present invention has been made in view of the above circumstances, and uses a hard coat agent capable of efficiently forming a hard coat layer having high hardness and excellent scratch resistance and flex resistance, and the hard coat agent. It aims at providing the laminated film which has the hard-coat layer formed in this way.
- the present inventors diligently studied hard coating agents. As a result, by using a hard coat agent containing an organic silicon compound having a reactive functional group and a hydrolyzable group, a polythiol compound, and an inorganic filler having a reactive functional group, the hardness is high and the scratch resistance is high.
- the present inventors have found that a hard coat layer having excellent resistance can be efficiently formed, and have completed the present invention.
- the following hard coating agents (1) to (3) and the laminated film (4) are provided.
- Content of component (B) The hard coat agent according to (1), wherein is 50 to 120% by mass relative to component (A).
- the hard-coat agent which can form efficiently the hard-coat layer which is high in hardness, and is excellent in abrasion resistance and bending resistance, and the hard-coat layer formed using this hard-coat agent A laminated film having is provided.
- Hard coat agent contains the following (A) component, (B) component, and (C) component.
- the hard coat agent of the present invention contains an organosilicon compound having a reactive functional group and a hydrolyzable group (hereinafter sometimes referred to as “organosilicon compound (A)”) as the component (A).
- organosilicon compound (A) organosilicon compound having a reactive functional group and a hydrolyzable group
- the reactive functional group in the organosilicon compound (A) refers to a group that can react with the mercapto group of the component (B) to form a chemical bond.
- the reactive functional group include a group having a carbon-carbon unsaturated bond such as a vinyl group, an allyl group, a styryl group, and a (meth) acryloyloxy group; an epoxy group; an isocyanate group; a mercapto group; Among these, a group having a carbon-carbon unsaturated bond is preferable, and a vinyl group is more preferable.
- the hydrolyzable group in the organosilicon compound (A) refers to a group that can form a siloxane bond (Si—O—Si bond) by hydrolysis reaction.
- Examples of the hydrolyzable group include alkoxy groups having 1 to 10, preferably 1 to 5 carbon atoms such as methoxy group, ethoxy group, and n-propoxy group; 6 to 15 carbon atoms such as phenoxy group, preferably 6 to 10 carbon atoms.
- An acyloxy group having 1 to 10 carbon atoms preferably 1 to 5 carbon atoms such as a formyloxy group, an acetoxy group, or a propionyloxy group; a halogen atom such as a chlorine atom or a bromine atom; Among these, an alkoxy group having 1 to 10 carbon atoms or an acyloxy group having 1 to 10 carbon atoms is preferable, and an acyloxy group having 1 to 10 carbon atoms is more preferable.
- organosilicon compound (A) examples include compounds represented by the following formula (I).
- R 1 represents a group having a reactive functional group
- R 2 represents a hydrolyzable group
- R 3 represents a non-hydrolyzable group having no reactive functional group.
- x is 1, 2 or 3
- y is 1, 2 or 3
- z is 0, 1 or 2
- the sum of x, y and z is 4.
- the plurality of R 1 , R 2, or R 3 may be the same or different from each other.
- R 1 examples include a reactive functional group and a group having a reactive functional group. Specific examples thereof include a group having a vinyl group such as a vinyl group and a vinyloxymethyl group; a group having an allyl group such as an allyl group and an allyloxymethyl group; a group having a styryl group such as a styryl group and a styrylmethyl group.
- Groups having (meth) acryloyl groups such as (meth) acryloyl groups and 3- (meth) acryloyloxypropyl groups; groups having epoxy groups such as epoxy groups, glycidyl groups and 3-glycidyloxypropyl groups; isocyanate groups; And groups having an isocyanate group such as 3-isocyanatopropyl group; groups having a mercapto group such as mercapto group and 3-mercaptopropyl group; Among these, a group having a carbon-carbon unsaturated bond is preferable, and a vinyl group is more preferable.
- the (meth) acryloyl group means an acryloyl group or a methacryloyl group (the same applies hereinafter).
- R 1 preferably has 2 to 20 carbon atoms, more preferably 2 to 10 carbon atoms.
- R 2 examples include the hydrolyzable group.
- R 2 preferably has 0 to 15 carbon atoms, more preferably 0 to 10 carbon atoms.
- R 3 is an alkyl group having 1 to 20 carbon atoms, preferably 1 to 15 carbon atoms such as a methyl group, an ethyl group, an n-propyl group, or an isopropyl group; 6 to 20 carbon atoms such as a phenyl group or a 1-naphthyl group; Preferred examples include 6 to 15 aryl groups.
- vinyl group-containing silane compounds such as vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane, vinyltrichlorosilane, and vinyltribromosilane; allyltrimethoxysilane, allyltriethoxysilane, Allyl group-containing silane compounds such as allyltriacetoxysilane, allyltrichlorosilane, allyltribromosilane; ⁇ -acryloxypropyltrimethoxysilane, ⁇ -acryloxypropyltriethoxysilane, ⁇ -acryloxypropyltrichlorosilane, ⁇ -acrylic ⁇ -acryloxyalkyl group-containing silane compounds such as loxypropyltribromosilane; ⁇ -methacryloxypropyltrimethoxysilane, ⁇ -methacryloxypropyltriethoxysilane, ⁇ -methacryloxy ⁇ -methacryloxy ⁇ -methacryl
- the hard coat agent of the present invention contains a polythiol compound as the component (B).
- a hard coat agent containing a polythiol compound in addition to the organosilicon compound (A) By using a hard coat agent containing a polythiol compound in addition to the organosilicon compound (A), a hard coat layer having excellent transparency, high pencil hardness, and excellent flex resistance can be formed.
- the polythiol compound is a compound having two or more mercapto groups in the molecule.
- polythiol compounds include compounds having 2 mercapto groups such as ethylene bis (mercaptoacetate) and ethylene bis (3-mercaptopropionate); trimethylolethane tris (mercaptoacetate), trimethylolethane tris (3-mercaptopropio) Compound) such as pentaerythritol tetrakis (mercaptoacetate), pentaerythritol tetrakis (3-mercaptopropio) ), Dipentaerythritol hexakis (mercaptoacetate), dipentaerythritol hexakis (3-mercaptopropionate) and the like. And the like are; compound.
- polythiol compound a compound having 3 mercapto groups or a compound having 4 or more mercapto groups is preferable, and trimethylolpropane tris (mercaptopropionate) is more preferable.
- a polythiol compound can be used individually by 1 type or in combination of 2 or more types.
- the content of the polythiol compound is not particularly limited.
- the content of the polythiol compound is usually 50 to 120% by mass, preferably 60 to 100% by mass, and more preferably 60 to 90% by mass with respect to the component (A). If a hard coat layer is formed using a hard coat agent with too little polythiol compound content, curling may occur in the laminated film. On the other hand, if a hard coat agent containing too much polythiol compound is used, it may be difficult to form a hard coat layer having high hardness.
- the hard coat agent of the present invention refers to an inorganic filler having a reactive functional group as the component (C) (an inorganic filler having a reactive functional group introduced on the surface by a modification treatment. (Sometimes referred to as “inorganic filler (C)”).
- inorganic filler (C) By using a hard coat agent containing an inorganic filler (C) in addition to the organosilicon compound (A) and the polythiol compound, it has excellent transparency, high pencil hardness, flex resistance, scratch resistance, curling property. A hard coat layer excellent in all of the above can be formed.
- the reactive functional group contained in the inorganic filler (C) refers to a group capable of forming a chemical bond by reacting with the mercapto group of the component (B).
- Examples of the reactive functional group include the same functional groups as those shown as the reactive functional group of the organosilicon compound (A). Of these, a group having a carbon-carbon unsaturated bond is preferable, and a (meth) acryloyloxy group is more preferable.
- Examples of the inorganic component constituting the inorganic filler (C) include metal oxides, metal hydroxides, and metal salts.
- Examples of the metal oxide include silica, titanium oxide, alumina, boehmite, chromium oxide, nickel oxide, copper oxide, titanium oxide, zirconium oxide, indium oxide, and zinc oxide.
- Examples of the metal hydroxide include aluminum hydroxide.
- Examples of the metal salt include metal carbonates such as calcium carbonate and magnesium carbonate; metal sulfates such as calcium sulfate and barium sulfate; metal silicates such as aluminum silicate, calcium silicate and magnesium silicate; Among these, as an inorganic component which comprises an inorganic filler (C), a metal oxide is preferable and a silica is more preferable.
- the shape of the inorganic filler (C) may be any of a spherical shape, a chain shape, a needle shape, a plate shape, a piece shape, a rod shape, a fiber shape, etc., but a spherical shape is preferable.
- the spherical shape means a substantially spherical shape including a polyhedron shape that can be approximated to a spherical shape, a spheroidal shape, an oval shape, a confetti shape, an eyebrow shape, and the like.
- size of an inorganic filler (C) is not specifically limited.
- the average particle size of the inorganic filler (C) is usually 5 to 1000 nm, preferably 7 to 500 nm, more preferably 10 to 100 nm, and particularly preferably 10 to 30 nm. When the average particle diameter of the inorganic filler (C) is within the above range, a hard coat layer having excellent transparency and scratch resistance can be efficiently formed.
- the average particle diameter of the inorganic filler (C) can be calculated using the specific surface area obtained by the BET method.
- the inorganic filler (C) can be used alone or in combination of two or more.
- the content of the inorganic filler (C) is not particularly limited.
- the content of the inorganic filler (C) is usually 30 to 130% by mass, preferably 60 to 125% by mass, based on the component (A).
- a hard coat agent having a content of the inorganic filler (C) of 90 to 125% by mass with respect to the component (A) it becomes easy to form a hard coat layer having high hardness.
- a hard coat agent having an inorganic filler (C) content of 90 to 125% by mass with respect to the component (A) it becomes easy to form a hard coat layer having excellent scratch resistance.
- the hard coat agent of the present invention may contain other components in addition to the component (A), the component (B), and the component (C) as long as the effects of the present invention are not impaired.
- other components include a solvent and a photopolymerization initiator.
- Solvents include aliphatic hydrocarbon solvents such as hexane, heptane and cyclohexane; aromatic hydrocarbon solvents such as toluene and xylene; halogenated hydrocarbon solvents such as methylene chloride and ethylene chloride; methanol, ethanol, propanol, Alcohol solvents such as butanol and 1-methoxy-2-propanol; ketone solvents such as acetone, methyl ethyl ketone, 2-pentanone, methyl isobutyl ketone and isophorone; ester solvents such as ethyl acetate and butyl acetate; cellosolve such as ethyl cellosolve System solvents and the like.
- a solvent can be used individually by 1 type or in combination of 2 or more types.
- the content of the solvent is preferably such that the solid content concentration of the hard coat agent of the present invention is 30 to 95% by mass or more, and 35 to 90% by mass. Is more preferable, and an amount of 40 to 85% by mass is even more preferable.
- the resulting coating film can be efficiently cured after coating the hard coating agent.
- the photopolymerization initiator include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylaminoacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- (methylthio) phenyl]- 2-morpholino-propan-1-one, 4- (2-hydroxyethoxy) phenyl-2 (hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4'-
- the content of the photopolymerization initiator is usually 0.01 to 10% by mass, preferably 0.8%, based on the total solid content of the hard coat agent. 5 to 10% by mass.
- the hard coat agent of this invention contains the said (A) component, (B) component, and (C) component.
- the reactive functional group contained in the component (A) or the component (C) can react with the mercapto group contained in the component (B), and can react with these reactive functional groups. It is.
- the hard coat agent of the present invention can use both a reaction involving a mercapto group and a reaction not involving a mercapto group, the use of the hard coat agent of the present invention provides high hardness and resistance. A hard coat layer having excellent scratch resistance can be formed.
- the reactive functional groups when the reactive functional groups are reacted with each other, it is usually necessary to irradiate or heat active energy rays such as ultraviolet rays or electron beams, so that the reactive functional group and the mercapto group The reaction proceeds faster than the reaction between reactive functional groups.
- the reaction between the reactive functional group and the mercapto group is an addition reaction, and even if this reaction occurs, the hard coat layer is unlikely to shrink.
- the reaction between the reactive functional groups occurs more than necessary, local curing shrinkage occurs, which may reduce optical properties and curl properties.
- Laminated film The laminated film of the present invention is a laminated film having a base layer and a hard coat layer, wherein the hard coat layer is formed using the hard coat agent of the present invention.
- multilayer film of this invention is used in order to hold
- the kind of base material layer is not specifically limited.
- a synthetic resin film can be used as the base material layer.
- synthetic resin films include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polymethacrylic acid.
- the film include methyl, polymethyl acrylate, polyethyl methacrylate, polystyrene, cellulose triacetate, cellophane, and polycarbonate.
- a primer layer may be provided on at least one surface of the base material layer.
- the primer layer is not particularly limited as long as it has good adhesion to the hard coat layer provided thereon and adhesion to the base material layer.
- conventionally known primer layers such as an acrylic primer layer, a polyester primer layer, a polyurethane primer layer, a silicone primer layer, and a rubber primer layer can be used.
- the thickness of the primer layer is usually 0.01 to 20 ⁇ m, preferably 0.1 to 15 ⁇ m.
- the thickness of a base material layer is not specifically limited, It can determine suitably according to the use etc. of a laminated film.
- the thickness of the base material layer is usually 10 to 500 ⁇ m, preferably 20 to 200 ⁇ m.
- the hard coat layer constituting the laminated film of the present invention is formed using the hard coat agent of the present invention.
- the thickness of the hard coat layer is usually from 0.1 to 50 ⁇ m, preferably from 0.5 to 20 ⁇ m.
- the hard coat layer can be formed by applying the hard coat agent of the present invention on a synthetic resin film (or primer layer) for the base material layer and curing the obtained coating film.
- the method for applying the hard coating agent on the synthetic resin film (or primer layer) is not particularly limited and a known method can be employed.
- a known method can be employed.
- roll coating method curtain flow coating method, Mayer bar coating method, reverse coating method, gravure coating method, gravure reverse coating method, air knife coating method, kiss coating method, blade coating method, smooth coating method, roll knife coating method, etc. Is mentioned.
- the method for curing the coating film is not particularly limited.
- the coating film can be cured by irradiating the coating film with active energy rays such as ultraviolet rays and electron beams.
- Active energy rays such as ultraviolet rays and electron beams.
- Ultraviolet irradiation can be performed by a high-pressure mercury lamp, a fusion H lamp, a xenon lamp, or the like.
- the irradiation amount of ultraviolet rays is preferably about 50 to 1000 mW / cm 2 in illuminance and about 50 to 1000 mJ / cm 2 in light quantity.
- the electron beam irradiation can be performed by an electron beam accelerator or the like.
- the irradiation amount of the electron beam is preferably about 10 to 1000 krad.
- drying process conditions are not particularly limited.
- the drying temperature is, for example, 40 to 150 ° C., preferably 60 to 140 ° C.
- the drying time is, for example, 30 seconds to 1 hour, preferably 1 to 30 minutes.
- the hard coat layer is formed using the hard coat agent of the present invention, and has high hardness and excellent scratch resistance.
- the hard coat layer constituting the laminated film of the present invention usually exhibits a hardness of F or higher and preferably H or higher when a pencil scratch hardness test is performed according to the method described in the examples.
- a pencil scratch hardness test is performed according to the method described in the examples.
- the laminated film of the present invention is preferably excellent in transparency. 89% or more is preferable and 90% or more is more preferable when the laminated film of this invention measures a total light transmittance. Although there is no upper limit in particular, it is usually 95% or less.
- the laminated film of the present invention preferably has excellent bending resistance. When the laminated film of the present invention is subjected to a mandrel bending test according to JIS K5600-5-1, it is preferably 4 mm ⁇ or less, more preferably 2 mm ⁇ or less.
- the laminated film of the present invention is preferably one having little warpage. When the curl property of the laminated film of the present invention is evaluated according to the method described in Examples, it is usually 110 mm or less, preferably 50 mm or less. Although there is no lower limit in particular, it is usually 3.5 mm or more.
- the laminated film of the present invention has a hard coat layer with high hardness and excellent scratch resistance and flex resistance, and is suitably used as a touch panel manufacturing material.
- -Solution (A1) of organosilicon compound (vinyltriacetoxysilane) (manufactured by Sakai Chemical Co., Ltd., trade name: SHC-001B, concentration 90%)
- -Solution (B1) of polythiol compound [trimethylolpropane tris (3-mercaptopropionate)] (manufactured by Sakai Chemical Co., Ltd., trade name: SHC-001A, concentration 60%)
- Inorganic filler (silica nanofiller having acryloyloxy group) dispersion (C1) (manufactured by Nissan Chemical Industries, trade name: AC-4130Y, concentration 30%, average particle size 40-50 nm)
- Inorganic filler (silica nanofiller having acryloyloxy group) dispersion (C2) (manufactured by Nissan Chemical Industries, trade name: AC-2140Z, concentration 40%, average particle size 10-15 nm)
- Example 1 110 parts of the organosilicon compound solution (A1), 100 parts of the polythiol compound solution (B1) and 119 parts of the inorganic filler dispersion (C1) were mixed, and the resulting mixture was diluted with methyl ethyl ketone to obtain a solid content concentration of 45. % Hard coating agent (1) was prepared. Apply a hard coat agent (1) to a polyethylene terephthalate film with a single-sided primer layer (manufactured by Toyobo Co., Ltd., trade name: PET50A4100, thickness 50 ⁇ m) using a Mayer bar # 10 so that the film thickness after curing is 5 ⁇ m.
- a single-sided primer layer manufactured by Toyobo Co., Ltd., trade name: PET50A4100, thickness 50 ⁇ m
- the coated film was cured by irradiating with ultraviolet rays (light quantity: 500 mJ / cm 2 ). Next, the cured coating film was dried at 120 ° C. for 20 minutes to form a hard coat layer to obtain a laminated film (1).
- Example 1 instead of the hard coat agent (1), hard coat agents (2) to (10) having the compositions shown in Table 1 were prepared, and this was used to produce a laminated film. In the same manner as in Example 1, laminated films (2) to (10) were obtained.
- the thickness of the hard coat layer was measured using a thickness meter (trade name: MH-15, manufactured by Nikon Corporation) according to JIS K 7130 (1999).
- Total light transmittance The total light transmittance of the laminated film was measured according to JIS K 7361-1 (1997) using a haze meter (trade name: N-DH-2000, manufactured by Nippon Denshoku Co., Ltd.).
- the hard coat layers of the laminated films (1) to (9) obtained in Examples 1 to 9 are excellent in transparency, high in hardness, and excellent in scratch resistance and flex resistance.
- the laminated films (5), (6), and (9) obtained in Examples 5, 6, and 9 have small warpage.
- the laminated film (10) obtained in Comparative Example 1 has low hardness and inferior scratch resistance.
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Abstract
Description
このようなタッチパネルを使用する際は、通常、ペンや指をタッチパネルの表面に接触させる。したがって、タッチパネルの表面は、ペンや指による接触が繰り返されても、傷つかないことが求められる。
このため、従来、タッチパネルを構成する樹脂フィルムにハードコート層を設けることが行われてきた。
しかしながら、そのような透明被膜を形成するためには樹脂組成物を十分に硬化させる必要があり、硬化条件によっては、目的の性能を有する透明被膜を形成することができないことがあった。
(A)成分:反応性官能基及び加水分解性基を有する有機ケイ素化合物
(B)成分:ポリチオール化合物
(C)成分:反応性官能基を有する無機フィラー
(2)前記(B)成分の含有量が、(A)成分に対して、50~120質量%である、(1)に記載のハードコート剤。
(3)前記(C)成分の含有量が、(A)成分に対して、30~130質量%である、(1)又は(2)に記載のハードコート剤。
(4)基材層とハードコート層を有する積層フィルムであって、
前記ハードコート層が、(1)~(3)のいずれかに記載のハードコート剤を用いて形成されたものである積層フィルム。
本発明のハードコート剤は、下記(A)成分、(B)成分、及び(C)成分を含有するものである。
(A)成分:反応性官能基及び加水分解性基を有する有機ケイ素化合物
(B)成分:ポリチオール化合物
(C)成分:反応性官能基を有する無機フィラー
この反応性官能基としては、ビニル基、アリル基、スチリル基、(メタ)アクリロイルオキシ基等の炭素-炭素不飽和結合を有する基;エポキシ基;イソシアネート基;メルカプト基;等が挙げられる。これらの中でも、炭素-炭素不飽和結合を有する基が好ましく、ビニル基がより好ましい。
この加水分解性基としては、メトキシ基、エトキシ基、n-プロポキシ基等の炭素数1~10、好ましくは1~5のアルコキシ基;フェノキシ基等の炭素数6~15、好ましくは6~10のアリールオキシ基;ホルミルオキシ基、アセトキシ基、プロピオニルオキシ基等の炭素数1~10、好ましくは1~5のアシルオキシ基;塩素原子、臭素原子等のハロゲン原子;等が挙げられる。これらの中でも、炭素数1~10のアルコキシ基又は炭素数1~10のアシルオキシ基が好ましく、炭素数1~10のアシルオキシ基がより好ましい。
xは1、2又は3、yは1、2又は3、zは0、1又は2であり、x、y、zの合計は4である。
x、y又はzが2以上のとき、複数のR1、R2又はR3は、同一であってもよいし、互いに異なっていてもよい。
R1の炭素数は、好ましくは2~20、より好ましくは2~10である。
R2の炭素数は好ましくは0~15、より好ましくは0~10である。
これらの中でも、有機ケイ素化合物(A)としては、ビニル基含有シラン化合物が好ましく、ビニルトリアセトキシシランがより好ましい。
有機ケイ素化合物(A)は、1種単独で、あるいは2種以上を組み合わせて用いることができる。
前記有機ケイ素化合物(A)に加えて、ポリチオール化合物を含有するハードコート剤を用いることにより、透明性に優れ、鉛筆硬度が高く、耐屈曲性に優れるハードコート層を形成することができる。
ポリチオール化合物としては、エチレンビス(メルカプトアセテート)、エチレンビス(3-メルカプトプロピオネート)等のメルカプト基数が2の化合物;トリメチロールエタントリス(メルカプトアセテート)、トリメチロールエタントリス(3-メルカプトプロピオネート)、トリメチロールプロパントリス(メルカプトアセテート)、トリメチロールプロパントリス(3-メルカプトプロピオネート)等のメルカプト基数が3の化合物;ペンタエリスリトールテトラキス(メルカプトアセテート)、ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)、ジペンタエリスリトールヘキサキス(メルカプトアセテート)、ジペンタエリスリトールヘキサキス(3-メルカプトプロピオネート)等のメルカプト基数が4以上の化合物;等が挙げられる。
ポリチオール化合物は、1種単独で、あるいは2種以上を組み合わせて用いることができる。
ポリチオール化合物の含有量が少な過ぎるハードコート剤を使用してハードコート層を形成すると、積層フィルムにカールが発生するおそれがある。一方、ポリチオール化合物が多過ぎるハードコート剤を使用すると、硬度が高いハードコート層を形成するのが困難になるおそれがある。
前記有機ケイ素化合物(A)及びポリチオール化合物に加えて、無機フィラー(C)を含有するハードコート剤を用いることにより、透明性に優れ、鉛筆硬度が高く、耐屈曲性、耐擦傷性、カール性のすべてに優れるハードコート層を形成することができる。
金属水酸化物としては、水酸化アルミニウム等が挙げられる。
金属塩としては、炭酸カルシウム、炭酸マグネシウム等の金属炭酸塩;硫酸カルシウム、硫酸バリウム等の金属硫酸塩;珪酸アルミニウム、珪酸カルシウム、珪酸マグネシウム等の金属珪酸塩;等が挙げられる。
これらの中でも、無機フィラー(C)を構成する無機成分としては、金属酸化物が好ましく、シリカがより好ましい。
無機フィラー(C)の平均粒径が上記範囲内にあることで、透明性に優れ、かつ、耐擦傷性に優れるハードコート層を効率よく形成することができる。
無機フィラー(C)の平均粒径は、BET法により得られた比表面積を利用して算出することができる。
特に、無機フィラー(C)の含有量が、(A)成分に対して90~125質量%のハードコート剤を使用すると、硬度が高いハードコート層を形成し易くなる。
また、無機フィラー(C)の含有量が、(A)成分に対して90~125質量%のハードコート剤を使用すると、耐擦傷性に優れるハードコート層を形成し易くなる。
溶媒としては、ヘキサン、ヘプタン、シクロヘキサンなどの脂肪族炭化水素系溶媒;トルエン、キシレン等の芳香族炭化水素系溶媒、塩化メチレン、塩化エチレン等のハロゲン化炭化水素系溶媒;メタノール、エタノール、プロパノール、ブタノール、1-メトキシ-2-プロパノール等のアルコール系溶媒;アセトン、メチルエチルケトン、2-ペンタノン、メチルイソブチルケトン、イソホロン等のケトン系溶媒;酢酸エチル、酢酸ブチル等のエステル系溶媒;エチルセロソルブ等のセロソルブ系溶媒等が挙げられる。
溶媒は、1種単独で、あるいは2種以上を組み合わせて用いることができる。
光重合開始剤としては、例えば、ベンゾイン、ベンゾインメチルエーテル、ベンゾインエチルエーテル、ベンゾインイソプロピルエーテル、ベンゾイン-n-ブチルエーテル、ベンゾインイソブチルエーテル、アセトフェノン、ジメチルアミノアセトフェノン、2,2-ジメトキシ-2-フェニルアセトフェノン、2,2-ジエトキシ-2-フェニルアセトフェノン、2-ヒドロキシ-2-メチル-1-フェニルプロパン-1-オン、1-ヒドロキシシクロヘキシルフェニルケトン、2-メチル-1-[4-(メチルチオ)フェニル]-2-モルフォリノ-プロパン-1-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、ベンゾフェノン、p-フェニルベンゾフェノン、4,4'-ジエチルアミノベンゾフェノン、ジクロロベンゾフェノン、2-メチルアントラキノン、2-エチルアントラキノン、2-ターシャリ-ブチルアントラキノン、2-アミノアントラキノン、2-メチルチオキサントン、2-エチルチオキサントン、2-クロロチオキサントン、2,4-ジメチルチオキサントン、2,4-ジエチルチオキサントン、ベンジルジメチルケタール、アセトフェノンジメチルケタール、p-ジメチルアミノ安息香酸エステル等が挙げられる。
光重合開始剤は、1種単独で、あるいは2種以上を組み合わせて用いることができる。
このように、本発明のハードコート剤は、メルカプト基が関与する反応とメルカプト基が関与しない反応の両方を利用できるものであるため、本発明のハードコート剤を用いることにより硬度が高く、耐擦傷性に優れるハードコート層を形成することができる。
一方、反応性官能基同士の反応が必要以上に起きると、局所的な硬化収縮が生じ、光学特性やカール性を低下させるおそれがある。
したがって、(B)成分の量を適切に調節し、反応性官能基とメルカプト基との反応後において未反応の反応性官能基が余り過ぎないようにしたハードコート剤を用いることで、光学特性、カール性、耐屈曲性にも優れるハードコート層を形成することができる。
本発明の積層フィルムは、基材層とハードコート層を有する積層フィルムであって、前記ハードコート層が、本発明のハードコート剤を用いて形成されたものであることを特徴とする。
基材層の種類は特に限定されない。例えば、合成樹脂フィルムを基材層として利用することができる。
合成樹脂フィルムとしては、例えば、ポリエチレン、ポリプロピレン、ポリ塩化ビニル、ポリ塩化ビニリデン、エチレン-酢酸ビニル共重合体、エチレン-ビニルアルコール共重合体、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、ポリメタクリル酸メチル、ポリアクリル酸メチル、ポリメタクリル酸エチル、ポリスチレン、三酢酸セルロース、セロファン、ポリカーボネート等のフィルムが挙げられる。
基材層の厚みは、通常、10~500μm、好ましくは20~200μmである。
ハードコート層の厚みは、通常、0.1~50μm、好ましくは0.5~20μmである。
紫外線照射は、高圧水銀ランプ、フュージョンHランプ、キセノンランプ等によって行うことができる。紫外線の照射量は、照度50~1000mW/cm2、光量50~1000mJ/cm2程度が好ましい。一方、電子線照射は、電子線加速器等によって行うことができる。電子線の照射量は、10~1000krad程度が好ましい。
乾燥処理条件は特に限定されない。乾燥温度は、例えば、40~150℃、好ましくは60~140℃であり、乾燥時間は、例えば、30秒から1時間、好ましくは1~30分である。
本発明の積層フィルムを構成するハードコート層は、実施例に記載の方法に従って鉛筆引っかき硬度試験を行ったときに、通常、F以上の硬度を示し、H以上が好ましい。
本発明の積層フィルムを構成するハードコート層は、実施例に記載の方法に従って耐擦傷性を評価した場合、通常は傷が観察されない。
本発明の積層フィルムは耐屈曲性に優れるものが好ましい。本発明の積層フィルムは、JIS K5600-5-1に準じて、マンドレル屈曲試験を行ったときに、4mmΦ以下が好ましく、2mmΦ以下がより好ましい。
本発明の積層フィルムは反りが少ないものが好ましい。本発明の積層フィルムは、実施例に記載の方法に従ってカール性を評価すると、通常は110mm以下、好ましくは50mm以下である。下限値は特にないが、通常は3.5mm以上である。
各例中の部及び%は、特に断りのない限り、質量基準である。
・有機ケイ素化合物(ビニルトリアセトキシシラン)の溶液(A1)(堺化学社製、商品名:SHC-001B、濃度90%)
・ポリチオール化合物〔トリメチロールプロパントリス(3-メルカプトプロピオネート)〕の溶液(B1)(堺化学社製、商品名:SHC-001A、濃度60%)
・無機フィラー(アクリロイルオキシ基を有するシリカナノフィラー)分散液(C1)(日産化学工業社製、商品名:AC-4130Y、濃度30%、平均粒径40~50nm)
・無機フィラー(アクリロイルオキシ基を有するシリカナノフィラー)分散液(C2)(日産化学工業社製、商品名:AC-2140Z、濃度40%、平均粒径10~15nm)
有機ケイ素化合物の溶液(A1)110部、ポリチオール化合物の溶液(B1)100部、無機フィラー分散液(C1)119部を混合し、得られた混合液をメチルエチルケトンで希釈して、固形分濃度45%のハードコート剤(1)を調製した。
片面プライマー層付ポリエチレンテレフタレートフィルム(東洋紡績社製、商品名:PET50A4100、厚み50μm)に、マイヤーバー#10を用いて硬化後の膜厚が5μmになるようにハードコート剤(1)をプライマー層の面上に塗布し、紫外線を照射(光量:500mJ/cm2)して塗膜を硬化させた。次いで硬化塗膜を、120oCで20分間乾燥してハードコート層を形成し、積層フィルム(1)を得た。
実施例1において、ハードコート剤(1)に代えて、第1表に記載の組成のハードコート剤(2)~(10)を調製し、これを使用して積層フィルムを製造したことを除き、実施例1と同様にして積層フィルム(2)~(10)をそれぞれ得た。
厚み計(ニコン社製、商品名:MH-15)を用いて、JIS K 7130(1999)に準じて、ハードコート層の膜厚を測定した。
ヘイズメーター(日本電色社製、商品名:N-DH-2000)を用いて、JIS K 7361-1(1997)に準じて、積層フィルムの全光線透過率を測定した。
鉛筆引っかき硬度試験機(安田精機製作所社製、商品名:No.553-M)を用いて、JIS K5600-5-4(1999)に準じて、荷重750g、引っかき速度0.5mm/秒で鉛筆引っかき硬度試験を行った。
積層フィルムのハードコート層を、スチールウール#0000を用いて、250g/cm2の荷重で長さ50mmの範囲を10往復擦り、その後目視で傷の有無を確認し、以下の基準で耐擦傷性を評価した。
◎:傷がない。
○:1~2本程度傷がある。
×:無数の傷がある。
JIS K5600-5-1(1999)に準じて、マンドレル屈曲試験を行い、積層フィルムの耐屈曲性を評価した。
積層フィルムを1辺10cmの正方形に切り取り、これを試験片とした。この試験片を水平の台上に静置し、このときの四隅の浮き(mm)を測定し、その合計値を算出した。
実施例1~9で得られた積層フィルム(1)~(9)のハードコート層は、透明性に優れるとともに、硬度が高く、かつ、耐擦傷性、耐屈曲性に優れる。
また、実施例5、6、9で得られた積層フィルム(5)、(6)、(9)は、反りが小さいものである。
一方、比較例1で得られた積層フィルム(10)は、硬度が低く、耐擦傷性に劣るものである。
Claims (4)
- 下記(A)成分、(B)成分、及び(C)成分を含有する、ハードコート剤。
(A)成分:反応性官能基及び加水分解性基を有する有機ケイ素化合物
(B)成分:ポリチオール化合物
(C)成分:反応性官能基を有する無機フィラー - 前記(B)成分の含有量が、(A)成分に対して、50~120質量%である、請求項1に記載のハードコート剤。
- 前記(C)成分の含有量が、(A)成分に対して、30~130質量%である、請求項1又は2に記載のハードコート剤。
- 基材層とハードコート層を有する積層フィルムであって、
前記ハードコート層が、請求項1~3のいずれかに記載のハードコート剤を用いて形成されたものである積層フィルム。
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JP6971965B2 (ja) | 2021-11-24 |
CN108699390A (zh) | 2018-10-23 |
JPWO2017150422A1 (ja) | 2018-12-27 |
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