WO2016175245A1 - コーティング組成物及び光学部材 - Google Patents
コーティング組成物及び光学部材 Download PDFInfo
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- WO2016175245A1 WO2016175245A1 PCT/JP2016/063209 JP2016063209W WO2016175245A1 WO 2016175245 A1 WO2016175245 A1 WO 2016175245A1 JP 2016063209 W JP2016063209 W JP 2016063209W WO 2016175245 A1 WO2016175245 A1 WO 2016175245A1
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- 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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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
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- C09C1/0096—Compounds of antimony
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
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- 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
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/006—Anti-reflective coatings
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
- C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
- C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
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Definitions
- the formed coating has high hardness, excellent transparency and adhesion, and even when an inorganic oxide vapor deposition film (such as an antireflection film) is formed on the coating, the weather resistance and light resistance of the coating are improved.
- the present invention relates to a coating composition and an optical member in which discoloration due to ultraviolet rays is almost completely suppressed.
- Plastic molded products are used in large quantities taking advantage of lightness, easy processability, impact resistance, etc., but on the other hand, they are insufficiently hard and easily scratched, are easily damaged by solvents, and are charged and dusty. Adhesion of the glass, insufficient heat resistance, etc., there were practical disadvantages compared to inorganic glass molded bodies when used as spectacle lenses, window materials, and the like. Therefore, it has been proposed to apply a protective coat to the plastic molded body. Many kinds of coating compositions used for coating have been proposed.
- an organic silicon compound or a hydrolyzate thereof is used as a main component (resin component or coating film forming component), and a colloidally dispersed silica sol is added to this. It has been put into practical use for lenses (see Patent Document 1).
- a silane coupling agent and a metal oxide colloidal particle (A) having a primary particle diameter of 2 to 60 nm are used as nuclei, and the surface is coated with a coating (B) made of acidic oxide colloidal particles.
- a stable modified metal oxide sol containing the obtained particles (C), containing (C) in a proportion of 2 to 50% by mass in terms of metal oxide, and having a primary particle size of 2 to 100 nm A coating composition is disclosed.
- a modified titanium oxide-zirconium oxide-tin oxide composite colloid coated with an alkylamine-containing antimony pentoxide is disclosed (see Patent Document 6).
- Patent Document 7 proposes a composition using colloidal silica and colloidal titania as fillers for the cured film.
- a colloidal silica is a solution in which a small amount of colloidal titania is added to a composition containing a colloidal silica as a main component, and development to a high refractive index resin lens exceeding 1.55 is practically difficult.
- some of the examples are semi-transparent films and are difficult to apply to optical applications that require transparency.
- hydrolysis of an organosilicon compound is performed by adding water and one or more inorganic acids such as hydrochloric acid and acetic acid.
- inorganic acids such as hydrochloric acid and acetic acid.
- a coating composition to which silica sol is added a cured film having a high transparency and a high hardness can be obtained.
- a lens substrate having a refractive index of 1.55 or more is used, interference fringes are generated in the cured film, There was a problem that it looked bad.
- an antireflection film (a film having a multilayer structure of inorganic oxide thin films based on optical interference theory) is often formed on the surface of the lens on the cured film. In this case, the antireflection film exhibits, for example, an extremely thin green reflection color, but there is a problem in that the reflection color varies depending on the position of the lens surface and is uneven.
- a method for suppressing interference fringes of a cured film there is a method using a coating composition using a high refractive index sol such as a titanium oxide sol, a zirconium oxide sol, a tin oxide sol, etc.
- a high refractive index sol such as a titanium oxide sol, a zirconium oxide sol, a tin oxide sol, etc.
- titanium oxide sol has a problem in compatibility with the organosilicon compound and its hydrolyzate, and the coating composition obtained by mixing the titanium oxide sol with the organosilicon compound or its hydrolyzate has poor dispersion stability.
- the cured film formed by this coating composition has poor water resistance, and has a drawback that titanium oxide is photoexcited by ultraviolet irradiation and colored blue.
- the refractive index of the cured film is reduced. While there is an advantage that it can be arbitrarily adjusted, there is a problem in that the high refractive index particles and the silica particles are aggregated due to the difference in the surface potential of the particles, and the cured film is spoiled.
- An object of the present invention is to provide a coating composition having improved compatibility stability between an organosilicon compound which is a matrix component of the coating composition and its hydrolyzate and a high refractive index sol, and By providing a coating composition with excellent properties, the above-mentioned problems (especially interference fringes, spiders, insufficient hardness) can be solved, and scratch resistance, surface hardness, abrasion resistance, flexibility, transparency, An object of the present invention is to provide an optical member having a cured film excellent in properties such as antistatic properties, dyeability, heat resistance, water resistance and chemical resistance.
- the present inventors have found a coating composition in which silica colloid particles and high refractive index particles are mixed without aggregation by conducting hydrolysis of an organosilicon compound using silica colloid particles as a catalyst. It was.
- a first aspect of the present invention is a coating composition containing the following component (M), component (F) and component (S):
- the component (M) has the general formula (I): (R 1 ) a (R 3 ) b Si (OR 2 ) 4- (a + b) (I)
- R 1 and R 3 are each an alkyl group having 1 to 35 carbon atoms, an aryl group, a halogenated alkyl group, a halogenated aryl group, an alkenyl group, or an epoxy group, an acryloyl group, a methacryloyl group, a mercapto group, An organic group having a ureido group, an ether group, an amino group, or a cyano group, and bonded to a silicon atom by a Si—C bond, and R 2 is an alkyl group having 1 to 8 carbon atoms, an alkoxy group An alkyl group or an acyl group, a and b are each an
- a second aspect is the coating composition according to the first aspect containing 1 to 20% by mass of the component (S)
- the metal oxide colloidal particles (A) are composed of Ti, Fe, Cu, Zn, Y, Zr, Nb, Mo, In, Sn, Sb, Ta, W, Pb, Bi, and Ce.
- a fifth aspect is any one of the first to third aspects, wherein the covering (B) is an acidic oxide of at least one metal selected from the group consisting of Si, Zr, Sn, Mo, Sb and W.
- a coating composition according to one point, A sixth aspect is the coating composition according to any one of the first to fifth aspects, in which the pH of the component (S) is 1 to 6.
- a seventh aspect is the coating composition according to any one of the first to sixth aspects, further containing at least one curing catalyst selected from the group consisting of metal salts, metal alkoxides, and metal chelate compounds, The eighth aspect is from the group consisting of alcohol organic solvents, ether organic solvents, ketone organic solvents, ester organic solvents, aliphatic hydrocarbon organic solvents, aromatic hydrocarbon organic solvents, and amide compound organic solvents.
- the coating composition according to any one of the first to seventh aspects further comprising at least one selected.
- a ninth aspect is the coating composition according to any one of the first to eighth aspects, further including at least one selected from the group consisting of silicone surfactants, acrylic surfactants, and fluorine surfactants.
- a tenth aspect is an optical member having a cured film made of a cured product of the coating composition according to any one of the first to ninth aspects on the surface of an optical substrate
- the eleventh aspect is an optical member further having an antireflection film on the surface of the optical member according to the tenth aspect
- a twelfth aspect is the method for producing a coating composition according to any one of the first to ninth aspects including the following steps (a) and (b): (A) Step: Mixing the component (M) and the component (S) as specified in any one of the first to ninth aspects, and at least a part or all of the component (M) Hydrolyzing (B) Step: The above-mentioned (F) specified as any one of the first to ninth aspects to the mixture containing at least a part or all of the hydroly
- the cured film formed by the coating composition of the present invention has hardness characteristics and adhesion characteristics obtained when silica colloidal particles are added as fillers, and refractive index characteristics obtained when high refractive index particles are added as fillers. Have both. Furthermore, this cured film is excellent in wear resistance, transparency, heat resistance, light resistance, and weather resistance. And the adhesiveness with the anti-reflective film (formed from an inorganic oxide, fluoride, etc.) formed on this cured film or a metal vapor deposition film is also favorable.
- the optical member having a cured film produced by the coating composition of the present invention can be used for an optical filter attached to a lens for a camera, an automobile window glass, a liquid crystal display, a plasma display, etc. in addition to a spectacle lens. .
- alkyl group having 1 to 35 carbon atoms include straight-chain or branched alkyl groups having 1 to 35 carbon atoms, such as methyl group, ethyl group, n-propyl group, i-propyl group, n- Butyl, i-butyl, s-butyl, t-butyl, n-pentyl, 1-methyl-n-butyl, 2-methyl-n-butyl, 3-methyl-n-butyl, 1,1-dimethyl-n-propyl group, 1,2-dimethyl-n-propyl group, 2,2-dimethyl-n-propyl group, 1-ethyl-n-propyl group, n-hexyl, 1-methyl- n-pentyl group, 2-methyl-n-pentyl group, 3-methyl-n-pentyl group, 4-methyl-n-pent
- a cyclic alkyl group can also be used.
- a cyclic alkyl group having 3 to 20 carbon atoms a cyclopropyl group, a cyclobutyl group, a 1-methyl-cyclopropyl group, a 2-methyl-cyclopropyl group, a cyclopentyl group, 1-methyl-cyclobutyl group, 2-methyl-cyclobutyl group, 3-methyl-cyclobutyl group, 1,2-dimethyl-cyclopropyl group, 2,3-dimethyl-cyclopropyl group, 1-ethyl-cyclopropyl group, 2 -Ethyl-cyclopropyl group, cyclohexyl group, 1-methyl-cyclopentyl group, 2-methyl-cyclopentyl group, 3-methyl-cyclopentyl group, 1-ethyl-cyclobutyl group, 2-ethyl-cyclobutyl group, 3-ethyl-cyclobutyl Group, 1,2-d
- alkyl group having 1 to 8 carbon atoms in the definition of R 2 examples include alkyl groups having 1 to 8 carbon atoms, alkyl groups having 1 to 5 carbon atoms, and alkyl groups having 1 to 4 carbon atoms.
- aryl group examples include aryl groups having 6 to 40 carbon atoms, such as a phenyl group, o-methylphenyl group, m-methylphenyl group, p-methylphenyl group, o-chlorophenyl group, and m-chlorophenyl.
- halogenated alkyl group and halogenated aryl group include the alkyl groups and aryl groups exemplified above substituted with a halogen group, and examples of the halogen group include fluorine, chlorine, bromine and iodine groups.
- alkenyl group examples include alkenyl groups having 2 to 10 carbon atoms, such as ethenyl group, 1-propenyl group, 2-propenyl group, 1-methyl-1-ethenyl group, 1-butenyl group and 2-butenyl group.
- Examples of the organic group having an epoxy group include a glycidoxymethyl group, a glycidoxyethyl group, a glycidoxypropyl group, a glycidoxybutyl group, a glycidoxyoctyl group, and an epoxycyclohexyl group.
- Examples of the organic group having an acryloyl group include an acryloylmethyl group, an acryloylethyl group, an acryloylpropyl group, and an acryloyloctyl group.
- Examples of the organic group having a methacryloyl group include a methacryloylmethyl group, a methacryloylethyl group, a methacryloylpropyl group, and a methacryloyloctyl group.
- Examples of the organic group having a mercapto group include an ethyl mercapto group, a propyl mercapto group, a butyl mercapto group, a hexyl mercapto group, and an octyl mercapto group.
- Examples of the organic group having a ureido group include a ureidoethyl group, a ureidopropyl group, a ureidobutyl group, a ureidohexyl group, and a ureidooctyl group.
- Examples of the organic group having an ether group include an ethyl ether group and a propyl ether group.
- Examples of the organic group having an amino group include an amino group, an aminomethyl group, an aminoethyl group, an aminopropyl group, an aminohexyl group, and an aminooctyl group.
- Examples of the organic group having a cyano group include a cyanoethyl group, a cyanopropyl group, a cyanobutyl group, and a cyanooctyl group.
- the alkoxyalkyl group is an alkyl group substituted with an alkoxy group, and examples thereof include a methoxymethyl group, an ethoxymethyl group, and an ethoxyethyl group.
- acyl group examples include formyl group, acetyl group, propionyl group, butyryl group, isobutyryl group and the like.
- Examples of the alkylene group having 2 to 20 carbon atoms in the definition of Y include an alkylene group derived from an alkyl group having 2 to 20 carbon atoms among the alkyl groups exemplified above.
- a methyl group includes a methylene group
- an ethyl group includes an ethylene group
- a propyl group includes a propylene group.
- the component (M) used in the coating composition of the present invention is represented by the following general formula (I): (R 1 ) a (R 3 ) b Si (OR 2 ) 4- (a + b) (I) (However, R 1 and R 3 are each an alkyl group having 1 to 35 carbon atoms, an aryl group, a halogenated alkyl group, a halogenated aryl group, an alkenyl group, or an epoxy group, an acryloyl group, a methacryloyl group, a mercapto group, An organic group having a ureido group, an ether group, an amino group, or a cyano group, and bonded to a silicon atom by a Si—C bond, and R 2 is an alkyl group having 1 to 8 carbon atoms, an alkoxy group An alkyl group or an acyl group, a and b are each an integer of 0, 1 or 2, and a + b is an integer of 0, 1
- organosilicon compound represented by the general formula (I) examples include tetramethoxysilane, tetraethoxysilane, tetra n-propoxysilane, tetraisopropoxysilane, tetra n-butoxysilane, tetraacetoxysilane, and methyltrimethoxysilane.
- Methyltriethoxysilane methyltripropoxysilane, methyltriacetoxysilane, methyltributoxysilane, methyltriamyloxysilane, methyltriphenoxysilane, methyltribenzyloxysilane, methyltriphenethyloxysilane, glycidoxymethyltrimethoxy Silane, glycidoxymethyltriethoxysilane, ⁇ -glycidoxyethyltrimethoxysilane, ⁇ -glycidoxyethyltriethoxysilane, ⁇ -glycidoxyethyltrimethoxysilane, ⁇ - Lysidoxyethyltriethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltrieth
- organosilicon compound represented by the general formula (II) examples include methylene bismethyldimethoxysilane, ethylene bisethyldimethoxysilane, propylene bisethyldiethoxysilane, butylene bismethyldiethoxysilane, and the like. Or in combination of two or more.
- the hydrolyzate of the organosilicon compound of the general formula (II) is a compound in which a part or all of the X is substituted with a hydrogen atom.
- the component (M) used in the coating composition of the present invention is preferably at least one silicon-containing substance selected from the group consisting of an organosilicon compound represented by the general formula (I) and a hydrolyzate thereof.
- the silicon-containing material includes a hydrolyzate of at least one organosilicon compound.
- one of R 1 and R 3 is an organic group having an epoxy group
- R 2 is an alkyl group
- a and b are 0 or 1, respectively
- a + b is 1 or 2
- An organosilicon compound of the general formula (I) or a hydrolyzate thereof is preferred.
- organosilicon compound represented by the general formula (I) as the component (M) include glycidoxymethyltrimethoxysilane, glycidoxymethyltriethoxysilane, ⁇ -glycidoxyethyltrimethoxy.
- ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropylmethyldiethoxysilane, ⁇ -glycidoxypropylmethyldimethoxysilane, and ⁇ -glycidoxyoctyltrimethoxysilane are used alone. Or as a mixture.
- ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropylmethyldiethoxysilane, ⁇ -glycidoxypropylmethyldimethoxysilane, and ⁇ -glycidoxyoctyltrimethoxysilane are further represented by the general formula (I)
- tetrafunctional compound examples include tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane, tetra n-propoxysilane, tetra n-butoxysilane, tetratert-butoxysilane, tetrasec-butoxysilane and the like. It is done.
- the component (F) used in the coating composition of the present invention has a primary particle diameter of 1 to 4 nm with the surface of a metal oxide colloidal particle (A) having a primary particle diameter of 2 to 60 nm as a nucleus.
- the primary particle diameter can be measured by observation with a transmission electron microscope.
- the diameter of 100 colloidal particles observed in a field of view with a magnification of 200,000 times is measured, and the average value is the primary particle diameter.
- the metal oxide colloidal particles (A) can be produced by a known method, for example, an ion exchange method, a peptization method, a hydrolysis method, or a reaction method.
- the ion exchange method include a method of treating the acidic salt of the metal with a hydrogen ion exchange resin, or a method of treating the basic salt of the metal with a hydroxyl type anion exchange resin.
- the peptization method include neutralizing the acidic salt of the metal with a base, or washing the gel obtained by neutralizing the basic salt of the metal with an acid, and then dissolving the acid with a base. The method of glueing is mentioned.
- Examples of the hydrolysis method include a method in which the metal alkoxide is hydrolyzed, or a method in which an unnecessary acid is removed after the basic salt of the metal is hydrolyzed under heating.
- Examples of the reaction method include a method of reacting the metal powder with an acid.
- the metal oxide colloidal particles (A) are at least selected from the group consisting of Ti, Fe, Cu, Zn, Y, Zr, Nb, Mo, In, Sn, Sb, Ta, W, Pb, Bi, and Ce. It consists of one kind of metal oxide.
- the metal oxide colloidal particles (A) are composed of metal oxides having a valence of 2 to 6, and the metal oxide forms include, for example, TiO 2 , Fe 2 O 3 , CuO, ZnO, and Y 2 O 3.
- metal oxides can be used alone or in combination. Examples of the combination include a method of mixing several kinds of the metal oxides, a method of compounding the metal oxides, and a method of solidifying the metal oxides at an atomic level.
- SnO 2 -WO 3 composite colloidal particles and SnO 2 particles and WO 3 particles are complexed occurs a chemical bond at the interface, and the SnO 2 particles and ZrO 2 particles at the interface
- SnO 2 —ZrO 2 composite colloidal particles composited by forming TiO 2 —ZrO 2 —SnO 2 composite colloidal particles obtained by forming a solid solution of TiO 2 , ZrO 2 and SnO 2 at the atomic level It is done.
- the metal oxide colloidal particles (A) can also be used as a compound by combining metal components, and examples thereof include ZnSb 2 O 6 , InSbO 4 , and ZnSnO 3 .
- the metal oxide colloidal particles (A) are used as nuclei, and the surface is coated with a coating (B) made of acidic oxide colloidal particles having a primary particle diameter of 1 to 4 nm.
- a coating (B) made of acidic oxide colloidal particles having a primary particle diameter of 1 to 4 nm is coated with modified metal oxide colloidal particles (C) are obtained.
- the acidic oxide used in the coating (B) is composed of colloidal particles of at least one metal oxide selected from the group consisting of Si, Sn, Mo, Sb and W.
- the coating (B) can be exemplified by, for example, SiO 2 , SnO 2 , MoO 3 , Sb 2 O 5 , WO 3 and the like as a metal oxide form.
- These acidic oxides can be used alone or in combination. Examples of the combination include a method of mixing several kinds of the acidic oxide, a method of complexing the acidic oxide, and a method of solidifying the acidic oxide at an atomic level.
- SnO 2 -WO 3 composite colloidal particles and SnO 2 particles and WO 3 particles are complexed occurs a chemical bond at the interface, and the SnO 2 particles and SiO 2 particles at the interface SnO 2 —SiO 2 composite colloidal particles that are compounded to form SnO 2 —WO 3 —SiO in which SnO 2 particles, WO 3 particles, and SiO 2 particles are chemically combined at their interfaces 2 composite colloidal particles, SnO 2 particles, MO 3 particles, and SiO 2 particles are chemically combined at the interface to form a composite, SnO 2 —MO 3 —SiO 2 composite colloidal particles, Sb 2 O 5 particles, Examples thereof include Sb 2 O 5 —SiO 2 composite colloidal particles that are combined with SiO 2 particles by chemical bonding at the interface.
- the coating (B) can be produced by a known method such as an ion exchange method or an oxidation method.
- a known method such as an ion exchange method or an oxidation method.
- the method of processing with the method of processing the acidic salt of the said metal with a hydrogen type ion exchange resin is mentioned.
- the oxidation method include a method of reacting a metal or metal oxide powder with hydrogen peroxide.
- Examples of the method for producing the modified metal oxide colloidal particles (C) that are constituents of the component (F) include the methods described in the republished WO12 / 165620 and the Japanese Patent No. 4730487.
- the sol of the modified metal oxide colloidal particles (C) used for the component (F) can contain other optional components as long as the object of the present invention is achieved.
- oxycarboxylic acids are contained in an amount of about 30% by mass or less based on the total amount of all metal oxides, a colloid with further improved performance such as dispersibility can be obtained.
- the oxycarboxylic acid used include lactic acid, tartaric acid, citric acid, gluconic acid, malic acid, glycol and the like.
- the modified metal oxide colloidal particle (C) sol used for the component (F) can contain an alkali component, and the alkali component is, for example, an alkali metal such as Li, Na, K, Rb, or Cs.
- Alkylamines such as hydroxide, ammonia, ethylamine, triethylamine, isopropylamine, n-propylamine, aralkylamines such as benzylamine, alicyclic amines such as piperidine, alkanolamines such as monoethanolamine and triethanolamine .
- These can contain 2 or more types in mixture.
- these can be contained in an amount of about 30% by mass or less based on the total amount of all metal oxides.
- it can use together with the said oxycarboxylic acid.
- an organosol can be obtained by replacing the aqueous medium of the aqueous sol with a hydrophilic organic solvent.
- This substitution can be performed by a usual method such as a distillation method or an ultrafiltration method.
- the hydrophilic organic solvent include lower alcohols such as methyl alcohol, ethyl alcohol and isopropyl alcohol, linear amides such as dimethylformamide and N, N′-dimethylacetamide, and cyclic amides such as N-methyl-2-pyrrolidone.
- glycols such as ethyl cellosolve and ethylene glycol.
- the coating composition of the present invention contains 10 to 150 parts by mass of the modified metal oxide colloidal particles (C) with respect to 100 parts by mass of the silicon-containing substance.
- the component (S) used in the coating composition of the present invention is silica colloidal particles having a primary particle size of 2 to 80 nm.
- the primary particle diameter is less than 2 nm, it is difficult to increase the concentration of the silica colloidal particle sol, and the amount of moisture brought into the coating composition increases, which may cause gelation of the coating composition.
- the primary particle diameter is 80 nm or more, the transparency of the cured film obtained by curing the coating composition is lowered, which is not suitable for optical applications requiring transparency.
- the component (S) contained in the coating composition of the present invention can be produced by a known method such as an ion exchange method, a neutralization peptization method, or an alkoxide hydrolysis method.
- the pH of the component (S) is preferably adjusted to 1 to 6.
- the coating composition of the present invention contains the component (M), the component (F) and the component (S).
- the content of the component (M) is 20 to 85% by mass based on the coating composition. And preferably 35 to 70% by mass.
- the content of the component (M) in the coating composition is less than 20% by mass, the curability of the cured film is remarkably lowered, easily scratched, and sometimes not cured.
- the content rate exceeds 85 mass%, the cure shrinkage of the said cured film will become large, and peeling may arise between a cured film and a base material.
- the content ratio of the component (S) is 0.1 to 30% by mass, preferably 1 to 20% by mass based on the coating composition.
- the (S) component in the coating composition is less than 0.1% by mass, hydrolysis of the (M) component hardly occurs and it is difficult to obtain a high hardness film.
- the content rate of (S) component exceeds 30 mass%, since the refractive index of a cured film falls remarkably, problems, such as an interference fringe and a spider, generate
- the content of the colloidal particles in the component (F) is 10 to 60% by mass, preferably 20 to 55% by mass, based on the coating composition.
- a coating composition of the present invention hydrolysis of the organosilicon compound in the component (M) is performed using the silica colloidal particles as the component (S) as a catalyst. That is, the following steps (a) and (b): (A) Process: The process which mixes the said (M) component and the said (S) component, and hydrolyzes at least one part or all of the said (M) component, (B) Process: The process which mixes the said (F) component with the mixture containing the hydrolyzate of at least one part or all of the (M) component obtained at the (a) process is included.
- a coating composition in which the colloidal silica particles and the high refractive index particles have compatibility stability can be produced.
- the coating composition of the present invention can further contain a curing catalyst in order to accelerate the curing reaction.
- the curing catalyst include amines such as allylamine and ethylamine, organic carboxylic acids or metal salts thereof, chromic acid, hypochlorous acid, boric acid, perchloric acid, bromic acid, selenous acid, thiosulfuric acid, orthosilicic acid, Examples thereof include inorganic acids such as thiocyanic acid, nitrous acid, aluminate, and carbonic acid or metal salts thereof, metal chelates such as aluminum, zirconium, or titanium alkoxide, and aluminum acetylacetonate.
- various fine metal oxides can be contained in order to match the refractive index with the lens serving as the base material.
- the fine particle metal oxide include fine particles such as aluminum oxide, titanium oxide, antimony pentoxide, zirconium oxide, silica, and cerium oxide having a primary particle diameter of 2 to 60 nm.
- the coating composition of the present invention can further contain an organic solvent capable of dissolving the component (M).
- organic solvents include alcohol organic solvents, ether organic solvents, ketone organic solvents, ester organic solvents, aliphatic hydrocarbon organic solvents, aromatic hydrocarbon organic solvents, amide compound organic solvents.
- the alcoholic organic solvent include monohydric alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol, and butyl alcohol; polyvalent alcohols such as ethylene glycol, diethylene glycol, propylene glycol, glycerin, trimethylolpropane, and hexanetriol.
- Alcohol ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether
- examples include monoethers of polyhydric alcohols such as diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether and propylene glycol monobutyl ether.
- ether-based organic solvent examples include, in addition to the above monoethers of polyhydric alcohols, for example, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dipropyl ether, ethylene glycol dibutyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether.
- Polyhydric alcohol ethers obtained by alkyl etherifying all hydroxyl groups of polyhydric alcohols such as propylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, and diethylene glycol diethyl ether; tetrahydrofuran, 1,4-dioxane, anisole, etc. .
- ketone organic solvent examples include acetone, methyl ethyl ketone, methyl isobutyl ketone, and methyl isoamyl ketone.
- ester organic solvent examples include methyl acetate, ethyl acetate, butyl acetate and the like.
- Examples of the aliphatic hydrocarbon organic solvent include hexane, heptane, octane, nonane, decane, and the like.
- aromatic hydrocarbon organic solvent examples include benzene, toluene, xylene and the like.
- amide compound organic solvent examples include dimethylformamide, dimethylacetamide, N-methylpyrrolidone and the like.
- alcohol organic solvents such as methanol, ethanol, isopropanol, butanol
- ether organic solvents such as ethylene glycol monomethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, ketone organic solvents
- acetone, methyl ethyl ketone, methyl isobutyl ketone, amide compound organic solvents, dimethylformamide, dimethylacetamide, N-methylpyrrolidone and the like are preferable because they are easily mixed with water.
- the said organic solvent can be used individually by 1 type or in mixture of 2 or more types.
- a silicone surfactant for the purpose of improving the wettability of the coating composition to the substrate and improving the smoothness of the cured film, a silicone surfactant, an acrylic surfactant, a fluorine surfactant, etc. It can be further contained in the composition. Further, an ultraviolet absorber, an antioxidant and the like can be added as long as they do not affect the physical properties of the cured film.
- the surfactant may be water-soluble, water-insoluble, or water-dispersible.
- silicone-based surfactant examples include polydimethylsiloxane in which the side chain or main chain terminal is modified with various substituents such as oligomers such as ethylene glycol and propylene glycol.
- acrylic surfactant those obtained by copolymerizing acrylic monomers are preferable.
- copolymerizable ones include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, ( (Meth) acrylic acid alkyl esters such as 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, octadecyl (meth) acrylate, hexadecyl (meth) acrylate, benzyl (meth) acrylate, (meth) acrylic Aromatic content such as naphthyl acid, 2-hydroxy-4-methacryloyloxyethoxy-benzophenone, 3- (2H-1,2,3-benzotriazol-2-yl) -4-hydroxyphenethyl- (meth) acrylate ( (Meth) acrylic acid alkyl esters, (meth) acrylic acid 2-hydride (Meth) acrylic acid alkyl est
- a known surfactant such as a surfactant having a perfluoroalkyl group such as perfluoroalkylsulfonic acid or perfluoroalkylcarboxylic acid can be used.
- the above-described additional components such as a curing catalyst, a fine metal oxide, an organic solvent, a surfactant and the like can be appropriately added to the coating composition of the present invention in a conventionally known ratio and production process.
- the coating composition of the present invention can be applied on a substrate to form a cured film.
- a transparent substrate suitable for optical applications an optical substrate having a cured film can be obtained.
- the curing of the coating composition can be performed by heat drying or irradiation with active energy rays.
- the curing conditions for heat drying are preferably 70 to 200 ° C, more preferably 90 to 150 ° C. Heat drying is preferably performed in hot air.
- active energy rays include infrared rays, ultraviolet rays, and electron beams. In particular, far infrared rays can suppress damage caused by heat.
- a method for applying the coating composition of the present invention to a substrate methods usually performed such as a dipping method, a spin method, and a spray method can be applied.
- a dipping method, a spin method, and a spray method can be applied.
- the dipping method and the spin method are particularly preferable.
- the adhesion between the substrate and the cured film is improved by chemical treatment with acid, alkali, various organic solvents or detergents, physical treatment with plasma, ultraviolet rays, etc. Can be made. Furthermore, the adhesiveness of a base material and a cured film can be improved more by performing the primer process using various resin.
- the cured film formed by the coating composition of the present invention can be used as an antireflection film as a high refractive index film, and further, by adding components having functions such as antifogging, photochromic, antifouling, etc. It can also be used as
- the optical member having a cured film formed by the coating composition of the present invention can be used for an optical filter attached to a lens for a camera, a window glass of an automobile, a liquid crystal display, a plasma display, etc. in addition to a spectacle lens. .
- the optical member of the present invention has a cured film formed of the coating composition of the present invention on the surface of an optical substrate, and an antireflection film composed of an inorganic oxide vapor deposition film is formed on the cured film.
- the antireflection film is not particularly limited, and a conventionally known single-layer or multilayer vapor-deposited film of inorganic oxide can be used. Examples of the antireflection film include, for example, the antireflection films disclosed in JP-A-2-262104 and JP-A-56-11603.
- Examples of the present invention are shown below. The present invention is not limited to these examples.
- the measuring method of physical properties is shown below.
- Moisture determined by Karl Fischer titration method.
- -Particle size The sol was dried on a copper mesh, observed with a transmission electron microscope (model number: JEM-1010, JEOL Co., Ltd., acceleration voltage 100 kV), 100 particle sizes were measured, and the average value was primary The particle diameter was taken.
- Specific gravity It was determined by a float balance method (20 ° C.).
- Viscosity Determined with an Ostwald viscometer (20 ° C.).
- the aqueous solution thus obtained was passed through a column packed with a hydrogen-type cation exchange resin (Amberlite (registered trademark) IR-120B), whereby an aqueous sol of acidic stannic oxide-silica composite colloidal particles (pH 2.4, SnO 2 containing 0.44% by mass, SiO 2 containing 0.87% by mass, SiO 2 / SnO 2 mass ratio 2.0) 1240 g was obtained.
- 3.2 g of diisopropylamine was added to the obtained aqueous sol.
- the obtained sol was an aqueous sol of alkaline stannic oxide-silica composite colloidal particles and had a pH of 8.0.
- colloidal particles having a primary particle diameter of 5 nm or less were observed with a transmission electron microscope.
- the molar ratio of diisopropylamine / (SnO 2 + SiO 2 ) was 0.15.
- the sol was washed and concentrated while adding pure water using an ultrafiltration device.
- the zirconium oxide-tin oxide composite colloidal particles having a specific gravity of 1.052 and a pH of 9.43 were obtained.
- 1040 g of sol containing was obtained.
- the obtained zirconium oxide-stannic oxide composite colloid had a particle diameter of 5 to 15 nm as observed with an electron microscope.
- the obtained aqueous sol of modified zirconium oxide-stannic oxide composite colloidal particles is passed through a column filled with a hydrogen-type cation exchange resin (Amberlite IR-120B), and an acidic modified zirconium oxide-stannic oxide composite is passed. 1980 g of an aqueous sol of colloidal particles was obtained.
- the obtained sol had a pH of 2.7 and a total metal oxide concentration of 3.0% by mass.
- 0.5 g of diisobutylamine was added to the obtained acidic sol, and diisobutylamine was bound to the surface of the modified zirconium oxide-stannic oxide colloidal particles.
- the pH of the sol at this time was 4.3.
- the obtained sol was concentrated to a total metal oxide concentration of 20% by mass using an ultrafiltration device.
- the concentrated sol had a specific gravity of 1.211 and a pH of 3.7.
- This concentrated aqueous sol is put into an evaporator with an eggplant-shaped flask, and water is distilled off at 600 Torr while adding methanol to the sol, whereby methanol of modified zirconium oxide-stannic oxide colloidal particles bound with diisobutylamine A dispersed sol was obtained.
- the obtained methanol-dispersed sol has a specific gravity of 1.184, a viscosity of 3.2 mPa ⁇ s, a pH of 4.9 (diluted with water of the same mass as the sol), a total metal oxide concentration of 38.5% by mass, and a moisture of 0.8% Met.
- Example 1 In a glass container equipped with a magnetic stirrer, 240 parts by mass of ⁇ -glycidoxypropyltrimethoxysilane was added and stirred with water-dispersed silica sol (Snowtex O; silica concentration 20% by mass, primary particle size 12 nm; Nissan Chemical Co., Ltd.) 110 parts by mass of Kogyo Kogyo Co., Ltd. were added and stirred for 24 hours to obtain a partial hydrolyzate of ⁇ -glycidoxypropyltrimethoxysilane.
- water-dispersed silica sol Snowtex O; silica concentration 20% by mass, primary particle size 12 nm; Nissan Chemical Co., Ltd.
- a titanium oxide-zirconium oxide-stannic oxide composite colloidal particle modified with a stannic oxide-silica composite colloid obtained in the same manner as in Production Example 5 of JP 2012-31353
- a 290 parts by mass of methanol-dispersed sol (containing 30.0% by mass in terms of total metal oxide) and 180 parts by mass of propylene glycol monomethyl ether were used as the partial hydrolyzate 313 of ⁇ -glycidoxypropyltrimethoxysilane described above.
- Example 2 290 parts by mass of methanol-dispersed sol of titanium oxide-zirconium oxide-stannic oxide composite colloidal particles modified with the stannic oxide-silica composite colloid described in Example 1 (30.0 in terms of total metal oxide) 229 parts by mass of a methanol-dispersed sol of zirconium oxide-tin oxide composite colloidal particles modified with the stannic oxide-silica composite colloid described in Production Example 3 above (converted to all metal oxides). This was carried out in the same manner as in Example 1, except that the content was changed to 38).
- Example 3 The same procedure as in Example 1 was performed except that the water-dispersed silica sol described in Example 1 was changed to 145 parts by mass of Snowtex OXS (silica concentration: 15% by mass, primary particle size: 6 nm; manufactured by Nissan Chemical Industries, Ltd.). .
- Snowtex OXS sica concentration: 15% by mass, primary particle size: 6 nm; manufactured by Nissan Chemical Industries, Ltd.
- Example 4 The same procedure as in Example 1 was conducted except that the water-dispersed silica sol described in Example 1 was changed to 110 parts by mass of Snowtex OL (silica concentration 20% by mass, primary particle diameter 40 nm; manufactured by Nissan Chemical Industries, Ltd.). .
- Snowtex OL sica concentration 20% by mass, primary particle diameter 40 nm; manufactured by Nissan Chemical Industries, Ltd.
- a titanium oxide-zirconium oxide-stannic oxide composite colloidal particle modified with a stannic oxide-silica composite colloid obtained in the same manner as in Production Example 5 of JP 2012-31353
- a 290 parts by mass of methanol-dispersed sol (containing 30.0% by mass in terms of total metal oxide) and 110 parts by mass of water-dispersed silica sol (Snowtex O) were added in this order and stirred, and then propylene glycol monomethyl ether 180 parts by mass, 5.2 parts by mass of aluminum acetylacetonate as a curing agent, and 8.5 parts by mass of leveling agent L-7001 (manufactured by Toray Dow Corning) diluted with methanol to a concentration of 10% are mixed and stirred sufficiently.
- leveling agent L-7001 manufactured by Toray Dow Corning
- Comparative Example 2 Titanium oxide-zirconium oxide modified with 110 parts by mass of water-dispersed silica sol (Snowtex O) and stannic oxide-silica composite colloid to the partially hydrolyzed ⁇ -glycidoxypropyltrimethoxysilane described in Comparative Example 1 -The same procedure as in Comparative Example 1 was conducted except that 290 parts by mass of methanol-dispersed sol of stannic oxide composite colloidal particles (containing 30.0% by mass in terms of total metal oxides) was added in this order.
- Example 3 The same procedure as in Example 1 was carried out except that the water-dispersed silica sol used was changed to 55 parts by mass of Snowtex MP1040 (silica concentration 40% by mass, primary particle size 100 nm; manufactured by Nissan Chemical Industries, Ltd.).
- a titanium oxide-zirconium oxide-stannic oxide composite colloidal particle modified with a stannic oxide-silica composite colloid obtained in the same manner as in Production Example 5 of JP 2012-31353
- a 145 parts by mass of methanol dispersion sol (contains 30.0% by mass in terms of total metal oxides), 180 parts by mass of propylene glycol monomethyl ether, 0.9 parts by mass of aluminum acetylacetonate as a curing agent, concentration in methanol 9.0 parts by weight of leveling agent L-7001 (manufactured by Toray Dow Corning) diluted to 10% was mixed and stirred thoroughly to prepare a hard coat coating solution. (Formation of cured film) The same operation as in Example 1 was performed.
- Comparative Example 5 145 parts by mass of methanol-dispersed sol of titanium oxide-zirconium oxide-stannic oxide composite colloidal particles modified with the stannic oxide-silica composite colloid described in Comparative Example 4 (30.0 in terms of total metal oxide) This was carried out in the same manner as in Example 1 except that 435 parts by mass of the water-dispersed silica sol (Snowtex O) was changed.
- optical members having the cured films obtained in the above examples and comparative examples were evaluated for various physical properties by the following test methods.
- Refractive index This is a value measured with an Abbe refractometer.
- Examples 1 to 4 of the present invention were superior in scratch resistance, adhesion, adhesion after weathering test, transparency, and weather resistance (cracking) after outdoor exposure, compared to In Examples 1 and 2, agglomeration occurred due to the difference in surface potential between the silica colloidal particles and the titanium oxide-zirconium oxide-stannic oxide composite colloidal particles modified with the stannic oxide-silica composite colloid, and the cured film was transparent. Property, scratch resistance, and adhesion were extremely low. Further, in Comparative Example 3, the primary particle size of the silica colloid particles was large, and thus the transparency of the cured film was significantly reduced.
- Comparative Example 4 a cured film was obtained by reducing the addition amount of titanium oxide-zirconium oxide-stannic oxide composite colloidal particles modified with a stannic oxide-silica composite colloid to match the refractive index with the base material.
- the scratch resistance, adhesion, and adhesion after the weather resistance test were extremely low.
- Comparative Example 5 interference fringes were generated in the cured film because of only silica colloid particles.
- the optical member having a cured film made of the coating composition of the present invention can be used for an optical filter attached to a lens for a camera, a window glass of an automobile, a liquid crystal display or a plasma display in addition to a spectacle lens.
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Abstract
Description
本発明の第1観点は、下記の(M)成分、(F)成分及び(S)成分を含有するコーティング組成物:
(M)成分は、一般式(I):
(R1)a(R3)bSi(OR2)4-(a+b) (I)
(但し、R1及びR3は、それぞれ炭素原子数1乃至35のアルキル基、アリール基、ハロゲン化アルキル基、ハロゲン化アリール基、アルケニル基、又はエポキシ基、アクリロイル基、メタクリロイル基、メルカプト基、ウレイド基、エーテル基、アミノ基若しくはシアノ基を有する有機基であって、且つSi-C結合によりケイ素原子と結合しているものであり、R2は炭素原子数1乃至8のアルキル基、アルコキシアルキル基又はアシル基であり、a及びbはそれぞれ0、1又は2の整数であり、a+bは0、1又は2の整数である。)又は一般式(II):
〔(R4)cSi(OX)3-c〕2Y (II)
(但し、R4は炭素原子数1乃至5のアルキル基であり、Xは炭素原子数1乃至4のアルキル基又はアシル基であり、Yはメチレン基又は炭素原子数2乃至20のアルキレン基であり、cは0又は1の整数である。)で表される有機ケイ素化合物及びそれらの加水分解物からなる群より選ばれる少なくとも1種のケイ素含有物質であって、該ケイ素含有物質は、少なくとも1種の有機ケイ素化合物の加水分解物を含み、且つ前記コーティング組成物中に20乃至85質量%含まれており、
(F)成分は、2乃至60nmの一次粒子径を有する金属酸化物のコロイド粒子(A)を核として、その表面を1乃至4nmの一次粒子径を有する酸性酸化物のコロイド粒子からなる被覆物(B)で被覆された、2乃至100nmの一次粒子径を有する変性金属酸化物コロイド粒子(C)であって、該コロイド粒子(C)は、前記コーティング組成物中に10乃至60質量%含まれており、
(S)成分は、2乃至80nmの一次粒子径を有するシリカコロイド粒子であって、前記コーティング組成物中に0.1乃至30質量%含まれているものであり、
第2観点は、前記(S)成分を1乃至20質量%含む第1観点に記載のコーティング組成物であり、
第3観点は、前記(M)成分と前記(F)成分との質量割合が、(F)成分/(M)成分=0.1乃至3であり、且つ(M)成分と(S)成分との質量割合が、(S)成分/(M)成分=0.01乃至1.5である第1観点又は第2観点に記載のコーティング組成物であり、
第4観点は、前記金属酸化物のコロイド粒子(A)が、Ti、Fe、Cu、Zn、Y、Zr、Nb、Mo、In、Sn、Sb、Ta、W、Pb、Bi及びCeからなる群から選ばれる少なくとも1種の金属の酸化物からなる第1乃至3の観点のいずれか1点に記載のコーティング組成物であり、
第5観点は、前記被覆物(B)が、Si、Zr、Sn、Mo、Sb及びWからなる群から選ばれる少なくとも1種の金属の酸性酸化物からなる第1乃至第3観点のいずれか1点に記載のコーティング組成物であり、
第6観点は、前記(S)成分のpHは、1乃至6である第1乃至5の観点のいずれか1点に記載のコーティング組成物であり、
第7観点は、金属塩、金属アルコキシド及び金属キレート化合物からなる群から選ばれる少なくとも1種の硬化触媒をさらに含有する第1乃至6の観点のいずれか1点に記載のコーティング組成物であり、
第8観点は、アルコール系有機溶媒、エーテル系有機溶媒、ケトン系有機溶媒、エステル系有機溶媒、脂肪族炭化水素系有機溶媒、芳香族炭化水素系有機溶媒及びアミド化合物系有機溶媒からなる群から選ばれる少なくとも1種をさらに含有する第1乃至7の観点のいずれか1点に記載のコーティング組成物であり、
第9観点は、シリコーン系界面活性剤、アクリル系界面活性剤及びフッ素系界面活性剤からなる群から選ばれる少なくとも1種をさらに含む第1乃至8の観点のいずれか1点に記載のコーティング組成物であり、
第10観点は、光学基材の表面に第1乃至9の観点のいずれか1点に記載のコーティング組成物を硬化物からなる硬化膜を有する光学部材であり、
第11観点は、第10観点に記載の光学部材の表面に更に反射防止膜を有する光学部材であり、
第12観点は、下記(a)工程及び(b)工程を含む第1乃至9の観点のいずれか1点に記載のコーティング組成物の製造方法:
(a)工程:各々第1乃至9の観点のいずれか1点に特定されるところの前記(M)成分と前記(S)成分とを混合し、前記(M)成分の少なくとも一部又は全部を加水分解する工程、
(b)工程:(a)工程で得られた(M)成分の少なくとも一部又は全部加水分解物を含む混合物に第1乃至9の観点のいずれか1点に特定されるところの前記(F)成分を混合する工程、である。
炭素原子数1乃至35のアルキル基としては直鎖又は分枝を有する炭素原子数1乃至35のアルキル基が挙げられ、例えばメチル基、エチル基、n-プロピル基、i-プロピル基、n-ブチル基、i-ブチル基、s-ブチル基、t-ブチル基、n-ペンチル基、1-メチル-n-ブチル基、2-メチル-n-ブチル基、3-メチル-n-ブチル基、1,1-ジメチル-n-プロピル基、1,2-ジメチル-n-プロピル基、2,2-ジメチル-n-プロピル基、1-エチル-n-プロピル基、n-ヘキシル、1-メチル-n-ペンチル基、2-メチル-n-ペンチル基、3-メチル-n-ペンチル基、4-メチル-n-ペンチル基、1,1-ジメチル-n-ブチル基、1,2-ジメチル-n-ブチル基、1,3-ジメチル-n-ブチル基、2,2-ジメチル-n-ブチル基、2,3-ジメチル-n-ブチル基、3,3-ジメチル-n-ブチル基、1-エチル-n-ブチル基、2-エチル-n-ブチル基、1,1,2-トリメチル-n-プロピル基、1,2,2-トリメチル-n-プロピル基、1-エチル-1-メチル-n-プロピル基及び1-エチル-2-メチル-n-プロピル基、n-ヘプチル基、n-オクチル基、n-ノニル基、n-デシル基、n-ウンデシル基、n-ドデシル基、n-トリデシル基、n-テトラデシル基、n-ペンタデシル基、n-ヘキサデシル基、n-ヘプタデシル基、n-オクタデシル基、n-ノナデシル基、n-エイコシル基等が挙げられる。
上記R2の定義における炭素原子数1乃至8のアルキル基、R4の定義における炭素原子数1乃至5のアルキル基ならびに上記Xの定義における炭素原子数1乃至4のアルキル基の例は上記のアルキル基のうち炭素原子数1乃至8のアルキル基、炭素原子数1乃至5のアルキル基ならびに炭素原子数1乃至4のアルキル基を挙げることができる。
(R1)a(R3)bSi(OR2)4-(a+b) (I)
(但し、R1及びR3は、それぞれ炭素原子数1乃至35のアルキル基、アリール基、ハロゲン化アルキル基、ハロゲン化アリール基、アルケニル基、又はエポキシ基、アクリロイル基、メタクリロイル基、メルカプト基、ウレイド基、エーテル基、アミノ基若しくはシアノ基を有する有機基であって、且つSi-C結合によりケイ素原子と結合しているものであり、R2は炭素原子数1乃至8のアルキル基、アルコキシアルキル基又はアシル基であり、a及びbはそれぞれ0、1又は2の整数であり、a+bは0、1又は2の整数である。)又は一般式(II):
〔(R4)cSi(OX)3-c〕2Y (II)
(但し、R4は炭素原子数1乃至5のアルキル基であり、Xは炭素原子数1乃至4のアルキル基又はアシル基であり、Yはメチレン基又は炭素原子数2乃至20のアルキレン基であり、cは0又は1の整数である。)で表される有機ケイ素化合物、及びそれらの加水分解物からなる群より選ばれる少なくとも1種のケイ素含有物質であって、該ケイ素含有物質は、少なくとも1種の有機ケイ素化合物の加水分解物を含む。
本発明のコーティング組成物に含有される(S)成分は、公知な方法、例えば、イオン交換法、中和解膠法、アルコキシドの加水分解法などの作製方法により製造することができる。
前記(S)成分のpHは、1乃至6に調製されていることが好ましい。
該コーティング組成物中の(M)成分の含有率が20質量%未満では、前記硬化膜の硬化性が著しく低下し、傷がつきやすく、場合により硬化しない場合がある。また、その含有率が85質量%を超えると前記硬化膜の硬化収縮が大きくなり、硬化膜と基材との間で剥離を生じる場合がある。
すなわち、下記(a)工程及び(b)工程:
(a)工程:前記(M)成分と前記(S)成分とを混合し、前記(M)成分の少なくとも一部又は全部を加水分解する工程、
(b)工程:(a)工程で得られた(M)成分の少なくとも一部又は全部加水分解物を含む混合物に前記(F)成分を混合する工程を含むものである。
上記工程によって、シリカコロイド粒子と高屈折率粒子とが相溶安定性を有するコーティング組成物を製造することができる。
前記アルコール系有機溶媒としては、例えばメチルアルコール、エチルアルコール、プロピルアルコール、ブチルアルコール等の一価アルコール;エチレングリコール、ジエチレングリコール、プロピレングリコール、グリセリン、トリメチロールプロパン、ヘキサントリオール等の多価アルコール;エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールモノプロピルエーテル、エチレングリコールモノブチルエーテル、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノプロピルエーテル、ジエチレングリコールモノブチルエーテル、プロピレングリコールモノメチルエーテル、プロピレングリコールモノエチルエーテル、プロピレングリコールモノプロピルエーテル、プロピレングリコールモノブチルエーテル等の多価アルコールのモノエーテル類等が挙げられる。
・水分:カールフィッシャー滴定法にて求めた。
・粒子径:ゾルを銅メッシュ上に乾燥させ、透過型電子顕微鏡(型番:JEM-1010 JEOL社製、加速電圧100kV)にて観察し、100個の粒子径を測定し、その平均値を一次粒子径とした。
・比重:浮き秤法(20℃)にて求めた。
・粘度:オストワルド粘度計(20℃)にて求めた。
JIS3号珪酸ナトリウム(SiO2として29.8質量%含有、富士化学(株)製)36gを純水400gに溶解し、次いでスズ酸ナトリウムNaSnO3・H2O(SnO2として55.1質量%含有、昭和化工(株)製)9.8gを溶解した。得られた水溶液を水素型陽イオン交換樹脂(アンバーライト(登録商標)IR-120B)を充填したカラムに通すことにより、酸性の酸化第二スズ-シリカ複合コロイド粒子の水性ゾル(pH2.4、SnO2として0.44質量%、SiO2として0.87質量%を含有、SiO2/SnO2質量比2.0)1240gを得た。次いで得られた水性ゾルにジイソプロピルアミンを3.2g添加した。得られたゾルはアルカリ性の酸化第二スズ-シリカ複合コロイド粒子の水性ゾルであり、pH8.0であった。該水性ゾルは、透過型電子顕微鏡により5nm以下の1次粒子径のコロイド粒子が観察された。また、ジイソプロピルアミン/(SnO2+SiO2)のモル比は、0.15であった。
1リットルのガラス製容器に、炭酸水素テトラメチルアンモニウム(多摩化学工業(株)製、水酸化テトラメチルアンモニウムに換算して42.4質量%を含有する。)水溶液251.85gと、純水95.6gとを投入し希釈水溶液とした。この水溶液を攪拌しながら、オキシ炭酸ジルコニウム粉末(ZrOCO3、AMR製、ZrO2として40.1質量%を含有する。)を水溶液中に徐々に添加し、合計で491.85g投入した。添加終了後、85℃に加熱後、メタスズ酸8.23g(昭和化工(株)製、SnO2として7.08g含有する。)を徐々に添加し、105℃にて5時間加熱熟成を行った。この加熱熟成終了時点では混合液はゾル状であった。更に145℃にて5時間の水熱処理を行った。水熱処理後に得られたものは、酸化ジルコニウム-酸化第二スズ複合体のコロイド粒子を含有するゾルであり、(ZrO2+SnO2)濃度として12.86質量%、比重1.180、pH10.62であった。次いでこのゾルを限外ろ過装置にて純水を添加しながら、ゾルを洗浄、濃縮したところ、濃度6.03質量%の比重1.052、pH9.43の酸化ジルコニウム-酸化スズ複合体コロイド粒子を含むゾル1040gが得られた。得られた酸化ジルコニウム-酸化第二スズ複合体コロイドは、電子顕微鏡観察による粒子径が5乃至15nmであった。
製造例2で調整した酸化ジルコニウム-酸化第二スズ複合コロイド粒子の水性ゾル830g(全金属酸化物として50g含有する。)に製造例1で調製したアルカリ性の酸化第二スズ-シリカ複合コロイド粒子の水性ゾル769gを添加し、十分に攪拌した。次いで95℃で2時間加熱熟成して、酸化第二スズ-シリカ複合コロイド粒子で被覆された変性酸化ジルコニウム-酸化第二スズ複合コロイド粒子の水性ゾル1599gを得た。得られたゾルのpHは8.3、全金属酸化物濃度は3.7質量%であった。得られた変性酸化ジルコニウム-酸化第二スズ複合コロイド粒子の水性ゾルを水素型陽イオン交換樹脂(アンバーライトIR-120B)が充填されたカラムに通し、酸性の変性酸化ジルコニウム-酸化第二スズ複合コロイド粒子の水性ゾル1980gを得た。得られたゾルはpH2.7、全金属酸化物濃度は3.0質量%であった。得られた酸性ゾルにジイソブチルアミンを0.5g添加し、変性酸化ジルコニウム-酸化第二スズコロイド粒子の表面にジイソブチルアミンを結合させた。このときのゾルのpHは4.3であった。次いで得られたゾルを限外濾過装置を用いて全金属酸化物濃度20質量%まで濃縮した。濃縮後のゾルの比重は1.211、pHは3.7であった。この濃縮された水性ゾルをナス型フラスコ付きエバポレータに投入し、該ゾルにメタノールを添加しながら600Torrで水を留去することにより、ジイソブチルアミンが結合した変性酸化ジルコニウム-酸化第二スズコロイド粒子のメタノール分散ゾルを得た。得られたメタノール分散ゾルは、比重1.184、粘度3.2mPa・s、pH4.9(ゾルと同質量の水で希釈)、全金属酸化物濃度38.5質量%、水分0.8%であった。
マグネチックスターラーを備えたガラス製容器に、γ-グリシドキシプロピルトリメトキシシラン240質量部を加え、撹拌しながら水分散シリカゾル(スノーテックスO;シリカ濃度20質量%、一次粒子径12nm;日産化学工業(株)製)110質量部を添加し、24時間撹拌を行い、γ-グリシドキシプロピルトリメトキシシランの部分加水分解物を得た。次に特開2012-31353号公報の製造例5に記載の方法と同様にして得られた酸化第二スズ-シリカ複合コロイドで変性された酸化チタン-酸化ジルコニウム-酸化第二スズ複合コロイド粒子のメタノール分散ゾル290質量部(全金属酸化物に換算して30.0質量%を含有する)、プロピレングリコールモノメチルエーテル180質量部を前述したγ-グリシドキシプロピルトリメトキシシランの部分加水分解物313質量部に添加し、更に硬化剤としてアルミニウムアセチルアセトネート5.2質量部、メタノールで濃度10質量%に希釈したレベリング剤L-7001(東レ・ダウコーニング製)9.0質量部を混合し、十分に撹拌してハードコート用コーティング液を調整した。
(硬化膜の形成)
ポリカーボネート系のプラスチックレンズ(屈折率nD=1.58)を用意し、これにディップコート法で上記のハードコート用コーティング液を塗布し(膜厚3μm)、120℃で2時間加熱処理して、塗膜を硬化させた。評価結果を表1に示した。
実施例1に記載の酸化第二スズ-シリカ複合コロイドで変性された酸化チタン-酸化ジルコニウム-酸化第二スズ複合コロイド粒子のメタノール分散ゾル290質量部(全金属酸化物に換算して30.0質量%を含有する)を前述の製造例3に記載の酸化第二スズ-シリカ複合コロイドで変成された酸化ジルコニウム-酸化スズ複合コロイド粒子のメタノール分散ゾル229質量部(全金属酸化物に換算して38質量%を含有する)に変更した以外は、実施例1と同様に実施した。
実施例1に記載の水分散シリカゾルをスノーテックスOXS(シリカ濃度15質量%、一次粒子径6nm;日産化学工業(株)製)145質量部に変更した以外は、実施例1と同様に行なった。
実施例1に記載の水分散シリカゾルをスノーテックスOL(シリカ濃度20質量%、一次粒子径40nm;日産化学工業(株)製)110質量部に変更した以外は、実施例1と同様に行なった。
マグネチックスターラーを備えたガラス製の容器に、γ-グリシドキシプロピルトリメトキシシラン240質量部を加え、撹拌しながら0.01規定の塩酸60質量部を3時間で滴下した。滴下終了後、0.5時間撹拌を行い、γ-グリシドキシプロピルトリメトキシシランの部分加水分解物を得た。次に特開2012-31353号公報の製造例5に記載の方法と同様にして得られた酸化第二スズ-シリカ複合コロイドで変性された酸化チタン-酸化ジルコニウム-酸化第二スズ複合コロイド粒子のメタノール分散ゾル290質量部(全金属酸化物に換算して30.0質量%を含有する)、水分散シリカゾル(スノーテックスO)110質量部の順に添加して攪拌した後、更にプロピレングリコールモノメチルエーテル180質量部、硬化剤としてアルミニウムアセチルアセトネート5.2質量部、メタノールで濃度10%に希釈したレベリング剤L-7001(東レ・ダウコーニング製)8.5質量部を混合し、十分に撹拌してハードコート用コーティング液を作製した。
(硬化膜の形成)
実施例1と同様に実施した。
比較例1に記載のγ-グリシドキシプロピルトリメトキシシランの部分加水分解物へ水分散シリカゾル(スノーテックスO)110質量部、酸化第二スズ-シリカ複合コロイドで変性された酸化チタン-酸化ジルコニウム-酸化第二スズ複合コロイド粒子のメタノール分散ゾル290質量部(全金属酸化物に換算して30.0質量%を含有する)の順序で添加した以外は比較例1と同様に実施した。
用いる水分散シリカゾルをスノーテックスMP1040(シリカ濃度40質量%、一次粒子径100nm;日産化学工業(株)製)55質量部に変更した以外は、実施例1と同様に行なった。
マグネチックスターラーを備えたガラス製の容器に、γ-グリシドキシプロピルトリメトキシシラン240質量部を加え、撹拌しながら0.01規定の塩酸60質量部を3時間で滴下した。滴下終了後、0.5時間撹拌を行い、γ-グリシドキシプロピルトリメトキシシランの部分加水分解物を得た。次に特開2012-31353号公報の製造例5に記載の方法と同様にして得られた酸化第二スズ-シリカ複合コロイドで変性された酸化チタン-酸化ジルコニウム-酸化第二スズ複合コロイド粒子のメタノール分散ゾル145質量部(全金属酸化物に換算して30.0質量%を含有する)、更にプロピレングリコールモノメチルエーテル180質量部、硬化剤としてアルミニウムアセチルアセトネート0.9質量部、メタノールで濃度10%に希釈したレベリング剤L-7001(東レ・ダウコーニング製)9.0質量部を混合し、十分に撹拌してハードコート用コーティング液を作製した。
(硬化膜の形成)
実施例1と同様に実施した。
比較例4に記載の酸化第二スズ-シリカ複合コロイドで変性された酸化チタン-酸化ジルコニウム-酸化第二スズ複合コロイド粒子のメタノール分散ゾル145質量部(全金属酸化物に換算して30.0質量%を含有する)を水分散シリカゾル(スノーテックスO)435質量部に変更した以外は、実施例1と同様に実施した。
スチールウール#0000で硬化膜表面を10往復擦り、傷の付く度合を目視で判断した。判断基準は下記の通りである。
A:全く傷が確認できない
B:若干の傷が確認できる/1cm2に3本以下の傷が確認される
C:目立った傷が確認できる/1cm2に10本以下の傷が確認されるが、膜剥がれは確認されない
D:膜剥がれが確認できる
硬化膜に1mm間隔で100目クロスカットを施し、このクロスカットした部分に粘着テープ(セロハンテープ、ニチバン(株)製品)を強く貼り付けた後、粘着テープを急速に剥がし、粘着テープを剥がした後の硬化膜の剥離の有無を調べた。評価基準は下記の通りである。
A:全く剥離が無い
B:100目中1乃至30目剥離が確認できる
C:100目中31乃至60目剥離が確認できる
D:100目中61乃至90目剥離が確認できる
E:100目中91目以上剥離が確認できる
硬化膜をキセノンウェザーメーター(照射強度40mW/m2)で100時間照射した後、該膜にクロスカットを施して(2)密着性試験と同様の試験を行ない、粘着テープを剥がした後の硬化膜の剥離の有無を調べた。評価基準は(2)密着性試験を用いた。
硬化膜をキセノンウェザーメーター(照射強度40mW/m2)で100時間照射した後、該膜のクラックの有無を目視で調べた。判断基準は次の通りである。
A:クラックが全く確認されない
B:一部クラックが確認される
C:全面にクラックが確認される
暗室内、蛍光灯下で硬化膜の曇りの有無を目視で調べた。判断基準は次の通りである。
A:曇りの発生がほとんど無いもの
B:曇りが透明硬化膜として問題がない程度のもの
C:白化が顕著に表れるもの
暗室内、蛍光灯下で硬化膜の干渉縞の有無を目視で調べた。判断基準は次の通りである。
A:干渉縞が全く見られない
B:干渉縞が若干見られる
C:干渉縞が顕著に見られる
Abbe屈折計にて測定した値である。
本発明の実施例1乃至4は、耐擦傷性、密着性、耐候性試験後の密着性、透明性及び屋外暴露後の耐候性(クラック性)に優れるものであったのに対して、比較例1、2では、シリカコロイド粒子と酸化第二スズ-シリカ複合コロイドで変性された酸化チタン-酸化ジルコニウム-酸化第二スズ複合コロイド粒子との表面電位の違いから凝集が起き、硬化膜の透明性、耐擦傷性、密着性が著しく低いものであった。また、比較例3では、シリカコロイド粒子の一次粒子径が大きいため、硬化膜の透明性が著しく低下したものであった。更に、比較例4では基材と屈折率を合わせるため酸化第二スズ-シリカ複合コロイドで変性された酸化チタン-酸化ジルコニウム-酸化第二スズ複合コロイド粒子の添加量を減らした事により、硬化膜の耐擦傷性、密着性及び耐候性試験後の密着性が著しく低いものであった。加えて、比較例5ではシリカコロイド粒子のみのため、硬化膜に干渉縞が発生するものであった。
Claims (12)
- 下記の(M)成分、(F)成分及び(S)成分を含有するコーティング組成物:
(M)成分は、一般式(I):
(R1)a(R3)bSi(OR2)4-(a+b) (I)
(但し、R1及びR3は、それぞれ炭素原子数1乃至35のアルキル基、アリール基、ハロゲン化アルキル基、ハロゲン化アリール基、アルケニル基、又はエポキシ基、アクリロイル基、メタクリロイル基、メルカプト基、ウレイド基、エーテル基、アミノ基若しくはシアノ基を有する有機基であって、且つSi-C結合によりケイ素原子と結合しているものであり、R2は炭素原子数1乃至8のアルキル基、アルコキシアルキル基又はアシル基であり、a及びbはそれぞれ0、1又は2の整数であり、a+bは0、1又は2の整数である。)又は一般式(II):
〔(R4)cSi(OX)3-c〕2Y (II)
(但し、R4は炭素原子数1乃至5のアルキル基であり、Xは炭素原子数1乃至4のアルキル基又はアシル基であり、Yはメチレン基又は炭素原子数2乃至20のアルキレン基であり、cは0又は1の整数である。)
で表される有機ケイ素化合物及びそれらの加水分解物からなる群より選ばれる少なくとも1種のケイ素含有物質であって、該ケイ素含有物質は、少なくとも1種の有機ケイ素化合物の加水分解物を含み、且つ前記コーティング組成物中に20乃至85質量%含まれており、
(F)成分は、2乃至60nmの一次粒子径を有する金属酸化物のコロイド粒子(A)を核として、その表面を1乃至4nmの一次粒子径を有する酸性酸化物のコロイド粒子からなる被覆物(B)で被覆された、2乃至100nmの一次粒子径を有する変性金属酸化物コロイド粒子(C)であって、該コロイド粒子(C)は、前記コーティング組成物中に10乃至60質量%含まれており、
(S)成分は、2乃至80nmの一次粒子径を有するシリカコロイド粒子であって、前記コーティング組成物中に0.1乃至30質量%含まれているものである。 - 前記(S)成分を1乃至20質量%含む請求項1に記載のコーティング組成物。
- 前記(M)成分と前記(F)成分との質量割合が、(F)成分/(M)成分=0.1乃至3であり、且つ(M)成分と(S)成分との質量割合が、(S)成分/(M)成分=0.01乃至1.5である請求項1又は2に記載のコーティング組成物。
- 前記金属酸化物のコロイド粒子(A)が、Ti、Fe、Cu、Zn、Y、Zr、Nb、Mo、In、Sn、Sb、Ta、W、Pb、Bi及びCeからなる群から選ばれる少なくとも1種の金属の酸化物からなる請求項1乃至3のいずれか一項に記載のコーティング組成物。
- 前記被覆物(B)が、Si、Zr、Sn、Mo、Sb及びWからなる群から選ばれる少なくとも1種の金属の酸性酸化物からなる請求項1乃至3のいずれか一項に記載のコーティング組成物。
- 前記(S)成分のpHは、1乃至6である請求項1乃至5のいずれか一項に記載のコーティング組成物。
- 金属塩、金属アルコキシド及び金属キレート化合物からなる群から選ばれる少なくとも1種の硬化触媒をさらに含有する請求項1乃至6のいずれか一項に記載のコーティング組成物。
- アルコール系有機溶媒、エーテル系有機溶媒、ケトン系有機溶媒、エステル系有機溶媒、脂肪族炭化水素系有機溶媒、芳香族炭化水素系有機溶媒及びアミド化合物系有機溶媒からなる群から選ばれる少なくとも1種をさらに含有する請求項1乃至7のいずれか一項に記載のコーティング組成物。
- シリコーン系界面活性剤、アクリル系界面活性剤及びフッ素系界面活性剤からなる群から選ばれる少なくとも1種をさらに含有する請求項1乃至8のいずれか一項に記載のコーティング組成物。
- 光学基材の表面に請求項1乃至9のいずれか一項に記載のコーティング組成物の硬化物からなる硬化膜を有する光学部材。
- 請求項10に記載の光学部材の表面に更に反射防止膜を有する光学部材。
- 下記(a)工程及び(b)工程を含む請求項1乃至9のいずれか一項に記載のコーティング組成物の製造方法:
(a)工程:各々請求項1乃至9のいずれか一項に特定されるところの前記(M)成分と前記(S)成分とを混合し、前記(M)成分の少なくとも一部又は全部を加水分解する工程、
(b)工程:(a)工程で得られた(M)成分の少なくとも一部又は全部加水分解物を含む混合物に請求項1乃至9のいずれか一項に特定されるところの前記(F)成分を混合する工程。
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- 2016-04-27 JP JP2017515579A patent/JP6741202B2/ja active Active
- 2016-04-27 WO PCT/JP2016/063209 patent/WO2016175245A1/ja not_active Ceased
- 2016-04-27 CN CN201680023984.2A patent/CN107960095B/zh active Active
- 2016-04-27 KR KR1020177031957A patent/KR102628748B1/ko active Active
- 2016-04-27 US US15/570,534 patent/US11634589B2/en active Active
- 2016-04-29 TW TW105113567A patent/TWI759263B/zh active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017110522A1 (ja) * | 2015-12-25 | 2017-06-29 | 株式会社ニコン・エシロール | ハードコート層形成用組成物、および、光学部材 |
| JPWO2017110522A1 (ja) * | 2015-12-25 | 2018-11-22 | 株式会社ニコン・エシロール | ハードコート層形成用組成物、および、光学部材 |
| JP2019206611A (ja) * | 2018-05-28 | 2019-12-05 | 東洋インキScホールディングス株式会社 | 高い透明性を有する無機酸化物分散体 |
| WO2020179657A1 (ja) * | 2019-03-01 | 2020-09-10 | 日産化学株式会社 | 防眩性被膜形成用塗布液、防眩性被膜及びそれを有する積層体 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107960095B (zh) | 2021-02-02 |
| TWI759263B (zh) | 2022-04-01 |
| US20180148579A1 (en) | 2018-05-31 |
| TW201708446A (zh) | 2017-03-01 |
| KR102628748B1 (ko) | 2024-01-24 |
| EP3290488A1 (en) | 2018-03-07 |
| US11634589B2 (en) | 2023-04-25 |
| CN107960095A (zh) | 2018-04-24 |
| KR20170141703A (ko) | 2017-12-26 |
| JPWO2016175245A1 (ja) | 2018-03-01 |
| JP6741202B2 (ja) | 2020-08-19 |
| EP3290488B1 (en) | 2022-10-19 |
| EP3290488A4 (en) | 2018-04-25 |
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