WO2019182085A1 - フォトクロミック硬化性組成物 - Google Patents
フォトクロミック硬化性組成物 Download PDFInfo
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- WO2019182085A1 WO2019182085A1 PCT/JP2019/011988 JP2019011988W WO2019182085A1 WO 2019182085 A1 WO2019182085 A1 WO 2019182085A1 JP 2019011988 W JP2019011988 W JP 2019011988W WO 2019182085 A1 WO2019182085 A1 WO 2019182085A1
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- 0 CC(C)(C1)CC(C)(C)CC1(c1ccccc1-1)c2c-1c(cc(-c(c(OC)c1)ccc1OC)c(OC)c1)c1c1c2C=CC(c2ccc(*)cc2)(c2ccc(*)cc2)O1 Chemical compound CC(C)(C1)CC(C)(C)CC1(c1ccccc1-1)c2c-1c(cc(-c(c(OC)c1)ccc1OC)c(OC)c1)c1c1c2C=CC(c2ccc(*)cc2)(c2ccc(*)cc2)O1 0.000 description 2
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/102—Photochromic filters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
- C08F222/102—Esters of polyhydric alcohols or polyhydric phenols of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/061—Polyesters; Polycarbonates
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0083—Nucleating agents promoting the crystallisation of the polymer matrix
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/35—Heterocyclic compounds having nitrogen in the ring having also oxygen in the ring
- C08K5/357—Six-membered rings
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
- C08K5/378—Thiols containing heterocyclic rings
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
- C09K9/02—Organic tenebrescent materials
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/23—Photochromic filters
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1003—Carbocyclic compounds
- C09K2211/1007—Non-condensed systems
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1003—Carbocyclic compounds
- C09K2211/1014—Carbocyclic compounds bridged by heteroatoms, e.g. N, P, Si or B
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
Definitions
- the present invention relates to a novel photochromic curable composition. Furthermore, it is related with the novel photochromic hardening body excellent in the photochromic effect
- Photochromism is a reversible action that quickly changes color when a compound is irradiated with light containing ultraviolet light, such as sunlight or light from a mercury lamp, and returns to its original color when light is turned off and placed in a dark place. It is applied to various uses. As photochromic compounds having such properties, fulgimide compounds, spirooxazine compounds, chromene compounds and the like have been found. Since these compounds can be made into optical articles having photochromic properties by being compounded with plastics, many studies have been made on compounding.
- photochromism is also applied in the field of spectacle lenses.
- Photochromic eyeglass lenses that use photochromic compounds function as sunglasses by rapidly coloring the lens outdoors when exposed to light containing ultraviolet rays such as sunlight, and fading indoors where there is no such light irradiation. It functions as normal transparent glasses, and its demand has increased in recent years.
- photochromic eyeglass lenses those made of plastic are particularly preferred from the viewpoint of lightness and safety, and the addition of photochromic properties to such plastic lenses is generally performed by compounding with the above photochromic compound.
- the following means are known.
- B A method in which a resin layer in which a photochromic compound is dispersed is provided on the surface of a plastic molded product such as a lens by coating or cast polymerization. This method is called a lamination method.
- Patent Document 1 Patent Document 2 and Patent Document 3
- lamination techniques see Patent Document 4 and Patent Document 3
- the photochromic curable composition containing the photochromic compound and the radical polymerizable monomer used in the kneading method or the laminating method is variously improved in order to exhibit the characteristics (I) to (VII) at a high level.
- a radical polymerizable monomer having a silanol group or a group capable of generating a silanol group by hydrolysis and / or a radical polymerizable monomer having an isocyanate group in the photochromic curable composition, photochromic properties And a method for improving the adhesion of the hard coat layer is known (Patent Document 3).
- Patent Document 3 can improve the durability of the photochromic compound in the photochromic cured product and improve the performance of the photochromic cured product by adding a radical polymerizable monomer having an epoxy group. Is described.
- patent document 4 it is known that hard coat adhesiveness can be improved by mix
- glycidyl methacrylate hereinafter sometimes simply referred to as “GMA” is used as a radical polymerizable monomer having an epoxy group.
- the present inventors have intensively studied to solve the above problems.
- the role of each polymerizable monomer contained in the photochromic curable composition was reviewed again.
- the radical polymerizable monomer having an epoxy group is an impurity acid. It has been found that it has the effect of quenching the components and maintaining a high degree of photochromic properties. Accordingly, the present inventors have conducted further studies on other polymerizable monomers in place of the radical polymerizable monomer having an epoxy group, which can solve the above-mentioned problems, and as a result, at least one oxetanyl in the molecule.
- the object of the present invention is to exhibit excellent photochromic properties such as little change in color tone, high color density and fast fading speed, as well as sufficient adhesion of the hard coat layer coated on the photochromic cured body.
- An object of the present invention is to provide a photochromic curable composition containing a radical polymerizable compound in place of a radical polymerizable compound having an epoxy group.
- the present invention (A) a radically polymerizable monomer having at least one oxetanyl group in one molecule (hereinafter sometimes simply referred to as component (A)), (B) a photochromic compound (hereinafter may be simply referred to as component (B)), and (C) a radical polymerizable monomer other than the component (A) (hereinafter may be simply referred to as component (C)). ) It is a photochromic curable composition characterized by including.
- the cured product obtained by polymerizing the photochromic curable composition of the present invention, and the photochromic laminate having the cured product not only have excellent photochromic properties, but also adhere to the hard coat layer coated on the photochromic cured product. Excellent in properties.
- (A) component in this invention, it contains the radically polymerizable monomer component which has at least 1 oxetanyl group which is (A) component, It is characterized by the above-mentioned.
- blending this (A) component it is excellent in a photochromic characteristic and can form the photochromic hardening body and photochromic laminated body with favorable adhesiveness with a hard-coat.
- the component (A) will be specifically described.
- Component (A) is a radical polymerizable monomer having at least one oxetanyl group in one molecule.
- the radical polymerizable group include a vinyl group, an allyl group, an acrylate group, and a methacrylate group. In order to obtain good photochromic properties, an acrylate group or a methacrylate group is preferred.
- a compound that can be suitably used in the present invention can be represented by the following formula (3).
- R 6 is a hydrogen atom or a methyl group
- R 7 and R 8 are each independently a linear or branched alkylene group having 1 to 4 carbon atoms
- R 9 is a linear or branched alkyl group having 1 to 4 carbon atoms
- e and f are each an average value of 0 to 20 numbers.
- Examples of the compound of the component (A) that can be preferably used in the present invention include (3-ethyl-3-oxetanyl) methyl methacrylate, 2- (3-ethyl-3-oxetanyl) ethyl methacrylate, 3- (3-ethyl- 3-oxetanyl) propyl methacrylate, 4- (3-ethyl-3-oxetanyl) butyl methacrylate, 2-[(3-ethyl-3-oxetanyl) methoxy] ethyl methacrylate, 2- [2-[(3-ethyl-3 -Oxetanyl) methoxy] ethoxy] ethyl methacrylate, 2-[(3-ethyl-3-oxetanyl) methoxy] -2-oxyethyl methacrylate, (3-methyl-3-oxetanyl) methyl methacrylate, 2- (3-methyl-3-oxetany
- These components (A) can be used alone or in combination of two or more.
- photochromic compound (component (B)) exhibiting photochromic properties
- those known per se can be used, and these can be used alone or in combination of two or more. .
- photochromic compounds are fulgide compounds, chromene compounds, and spirooxazine compounds.
- fulgide compounds chromene compounds
- spirooxazine compounds Typical examples of such photochromic compounds are fulgide compounds, chromene compounds, and spirooxazine compounds.
- indeno [2,1-f] naphtho [1,2-b] pyran skeleton is used from the viewpoint of photochromic properties such as color density, initial colorability, durability, and fading speed. It is more preferable to use a chromene compound having In particular, a chromene compound having a molecular weight of 540 or more is preferably used because it is particularly excellent in color density and fading speed.
- chromene compounds shown below are examples of chromene compounds that are particularly preferably used in the present invention.
- the present invention is particularly excellent when using a compound having an amino group as a substituent among the chromene compounds having an indeno [2,1-f] naphtho [1,2-b] pyran skeleton. It is effective.
- an amino group (having two hydrogen atoms, one having one hydrogen atom substituted with another group, and one having two hydrogen atoms substituted with another group)
- the chromene compound having When the chromene compound having) is used, the resulting photochromic cured product may have a large change in color tone over time. Therefore, the present invention is particularly effective when such a chromene compound having an amino group is used.
- Specific examples of the chromene compound include the following compounds.
- the photochromic curable composition of this invention contains the polymerizable monomer ((C) component) different from (A) component other than the said (A) component.
- the component (C) a known component can be used. Especially, it is preferable that the (meth) acrylate monomer component which has two or more (meth) acrylate groups in 1 molecule is included. And a bifunctional (meth) acrylate monomer having two (meth) acrylate groups in one molecule (hereinafter sometimes referred to simply as “(C1) bifunctional (meth) acrylate monomer” or (C1) component) , A polyfunctional (meth) acrylate monomer having three or more (meth) acrylate groups in one molecule (hereinafter simply referred to as “(C2) polyfunctional (meth) acrylate monomer”, or (C2) component) ) And) are more preferable.
- the monofunctional (meth) acrylate (henceforth only (C3) monofunctional (meth) acrylate monomer or a (C3) component may be included) which has one (meth) acrylate group can also be included.
- C3 polymerizable monomers will be described.
- the photochromic curable composition of the present invention preferably contains a (C1) bifunctional (meth) acrylate monomer.
- the specific example is shown below. Specifically, it is a compound shown in the following formulas (1), (4) and (5). Among these, it is particularly preferable to include a polyalkylene glycol di (meth) acrylate monomer having a molecular weight of 300 to 2000, which is a bifunctional (meth) acrylate monomer component represented by the following formula (1).
- the compound represented by the following formula (1) may be simply referred to as the component (C1-1), and the compound represented by the following formula (4) may be simply referred to as the component (C1-2) hereinafter.
- the compound represented by the following formula (5) is hereinafter simply referred to as the component (C1-3).
- (C1) component a bifunctional (meth) acrylate monomer having a urethane bond (hereinafter sometimes referred to simply as (C1-4) component), the (C1-1) component, the (C1) -2) component, (C1-3) component, and bifunctional (meth) acrylate monomer that does not correspond to the (C1-4) component (hereinafter sometimes simply referred to as (C1-5) component) explain.
- R 1 and R 2 are each a hydrogen atom or a methyl group
- a and b are each an integer of 0 or more
- a + b is an integer of 2 or more.
- the component (C-1) is often obtained as a mixture in production. Therefore, a + b is an average value of 2 or more, and preferably an average value of 2 or more and 30 or less.
- Examples of the compound (C1-1) represented by the above formula (1) include diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, pentaethylene glycol dimethacrylate, pentapropylene glycol dimethacrylate, Diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, pentaethylene glycol diacrylate, tripropylene glycol diacrylate, tetrapropylene glycol diacrylate, pentapropylene glycol diacrylate, dipropylene glycol and a mixture of polypropylene glycol and polyethylene glycol (Meth) acrylate (two polyethylene, poly Lopyrene has two repeating units), polyethylene glycol dimethacrylate (especially average molecular weight 330), polyethylene glycol dimethacrylate (especially average molecular weight 536), polyethylene glycol dimethacrylate (especially average molecular weight 736), tripropylene glyco
- the component (C1-1) is contained as an essential component.
- R 10 and R 11 are each a hydrogen atom or a methyl group
- R 12 and R 13 are each a hydrogen atom or a methyl group
- R 14 is each a hydrogen atom or a halogen atom
- B represents —O—, —S—, — (SO 2 ) —, —CO—, —CH 2 —, —CH ⁇ CH—, —C (CH 3 ) 2 —, —C (CH 3 ) (C 6 H 5)
- - is any one of
- g and h are integers of 1 or more and 29 or less, respectively, and g + h is an integer of 2 or more and 30 or less on average.
- the polymerizable monomer represented by the above formula (4) is usually obtained in the form of a mixture of molecules having different molecular weights. Therefore, g and h are shown as average values.
- R 15 and R 16 are each a hydrogen atom or a methyl group, i is an average value of 1 to 20, A and A ′ may be the same or different from each other, and each represents a linear or branched alkylene group having 2 to 15 carbon atoms. When a plurality of A are present, the plurality of A are the same group. Or a different group.
- the compound represented by the above formula (5) can be produced by reacting polycarbonate diol with (meth) acrylic acid.
- polycarbonate diol used. Specifically, polycarbonate diol (number average of 500 to 2,000) obtained by phosgenation of polyalkylene glycol such as trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, octamethylene glycol, nonamethylene glycol, etc.
- polyalkylene glycol such as trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, octamethylene glycol, nonamethylene glycol, etc.
- a mixture of two or more polyalkylene glycols for example, a mixture of trimethylene glycol and tetramethylene glycol, a mixture of tetramethylene glycol and hexamethylene diglycol, a mixture of pentamethylene glycol and hexamethylene glycol, tetramethylene glycol and octamethylene glycol
- a polycarbonate diol (number average molecular weight of 500 to 2,000) obtained by phosgenation of a mixture of the following, a mixture of hexamethylene glycol and octamethylene glycol, etc .; Polycarbonate diol obtained by phosgenation of 1-methyltrimethylene glycol (number average molecular weight: 500 to 2,000).
- the component (C1-1), the component (C1-2), and the component (C1-3) can be appropriately used depending on the use.
- the type and blending amount can be appropriately determined according to the difference in the production method of the photochromic cured product such as a kneading method and a lamination method.
- the other component (C) will be described.
- the (C1-4) component is typically a reaction product of a polyol and a polyisocyanate.
- the polyisocyanate for example, hexamethylene diisocyanate, isophorone diisocyanate, lysine isocyanate, 2,2,4-hexamethylene diisocyanate, dimer acid diisocyanate, isopropylidenebis-4-cyclohexyl isocyanate, dicyclohexylmethane diisocyanate, norbornene diisocyanate or Mention may be made of methylcyclohexane diisocyanate.
- polyol for example, polyalkylene glycol having a repeating unit of ethylene oxide, propylene oxide or hexamethylene oxide having 2 to 4 carbon atoms, or polyester diol such as polycaprolactone diol, polycarbonate diol, polybutadiene diol, pentaerythritol, ethylene Glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, 1,8-nonanediol, neopentyl glycol , Diethylene glycol, dipropylene glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, glycerin, trimethylolpropane, etc. Can.
- polyester diol such as polycaprolactone diol, polycarbonate
- a reaction mixture obtained by further reacting 2-hydroxy (meth) acrylate with a product obtained by reacting these polyisocyanate and polyol with a urethane prepolymer a reaction mixture obtained by further reacting 2-hydroxy (meth) acrylate with a product obtained by reacting these polyisocyanate and polyol with a urethane prepolymer, ) Urethane (meth) acrylate monomer, which is a reaction mixture directly reacted with acrylate, can also be used.
- Examples of commercially available components (C1-4) include U-2PPA (molecular weight 482), UA-122P (molecular weight 1,100), U-122P (molecular weight 1,100) manufactured by Shin-Nakamura Chemical Co., Ltd. And EB4858 (molecular weight 454) manufactured by Daicel UCB.
- (C1-5) Other bifunctional (meth) acrylate monomers (C1-5)
- the component (C1-5) include compounds having (meth) acrylate groups at both ends of an alkylene group which may have a substituent. .
- those having an alkylene group having 6 to 20 carbon atoms are preferable. Specifically, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, 1,9-nonanediol diacrylate, 1,9-nonanediol dimethacrylate, 1,10-decanediol diacrylate, 1,10-decanediol dimethacrylate and the like.
- component (C-5) examples include a bifunctional (meth) acrylate monomer containing a sulfur atom.
- the sulfur atom forms part of the molecular chain as a sulfide group.
- (C1-1) component (C1-2) component, (C1-3) component, (C1-4) component, and (C1-5) component
- a single component in each component may be used. It is possible to use a plurality of types described above. In the case where a plurality of types are used, the mass serving as a reference for the component (C1) is the total amount of the plurality of types.
- the (C2) polyfunctional (meth) acrylate monomer will be described.
- the (C2) component includes a compound represented by the following formula (2) (hereinafter sometimes simply referred to as the (C2-1) component), a polyfunctional compound having a urethane bond ( (Meth) acrylate monomer (hereinafter sometimes referred to simply as (C2-2) component), polyrotaxane monomer (hereinafter also referred to simply as (C2-3) component), silsesquioxane monomer (hereinafter referred to simply as ( C2-4) component), and a polyfunctional (meth) acrylate monomer (hereinafter simply referred to as (C2-5) component) not corresponding to the component (C2-1) and the component (C2-2). In some cases).
- the component (C2-1) is preferably used as an essential component because the properties of the resulting photochromic cured product can be easily controlled.
- R 3 is a hydrogen atom or a methyl group
- R 4 is a hydrogen atom or an alkyl group having 1 to 2 carbon atoms
- R 5 is a carbon atom, a trivalent to hexavalent hydrocarbon group having 1 to 10 carbon atoms, or an organic group having 3 to 6 carbon atoms including an oxygen atom
- c is an average value of 0 to 3
- d is an integer of 3 to 6.
- the alkyl group having 1 or 2 carbon atoms represented by R 4 is preferably a methyl group.
- Examples of the organic group represented by R 5 include a carbon atom, a hydrocarbon group containing a hydroxyl group derived from a polyol, an organic group containing a 3 to 6 valent hydrocarbon group, and a 3 to 6 valent urethane bond. It is done.
- (C2-2) Polyfunctional (meth) acrylate monomer having urethane bond
- the (C2-2) component is obtained by reacting the polyisocyanate compound described in the (C1-4) component with a polyol compound. It is a compound having three or more (meth) acrylate groups therein.
- Commercially available products include U-4HA (molecular weight 596, functional group number 4), U-6HA (molecular weight 1,019, functional group number 6), U-6LPA (molecular weight 818, functional group number 6) manufactured by Shin-Nakamura Chemical Co., Ltd.
- U-15HA molecular weight 2,300, functional group number 15).
- C2-3) Polyrotaxane monomer Polyrotaxane monomer A cyclic molecule; It has a complex molecular structure consisting of an axial molecule having bulky groups at both ends so as not to leave the ring of the cyclic molecule and prevent the ring from leaving, and three or more (metabolites) in the molecule. ) A monomer having an acrylate group.
- suitable as a polymer for forming a chain portion is polyethylene glycol, polyisoprene, polyisobutylene, polybutadiene, polypropylene glycol, polytetrahydrofuran, polydimethylsiloxane, polyethylene, polypropylene, polyvinyl alcohol or polyvinyl methyl ether.
- Polyethylene glycol is most preferred.
- the bulky group formed at both ends of the chain portion is preferably an adamantyl group.
- the molecular weight of the above-described axial molecule is not particularly limited, but if it is too large, the compatibility with other components, such as other polymerizable monomers, tends to deteriorate, and if it is too small, it is cyclic. There is a tendency that the mobility of the molecule is lowered and the photochromic property is lowered. From such a viewpoint, the weight average molecular weight Mw of the axial molecule is preferably in the range of 1,000 to 100,000, more preferably 5,000 to 80,000, particularly preferably 8,000 to 30,000. .
- the cyclic molecule only needs to have a ring with a size that can include the above-described axial molecule, and as such a ring, a cyclodextrin ring is preferable.
- Cyclodextrin rings include ⁇ -form (ring inner diameter 0.45-0.6 nm), ⁇ -form (ring inner diameter 0.6-0.8 nm), and ⁇ -form (ring inner diameter 0.8-0.95 nm).
- an ⁇ -cyclodextrin ring and a ⁇ -cyclodextrin ring are particularly preferable, and an ⁇ -cyclodextrin ring is most preferable.
- a plurality of cyclic molecules having a ring as described above are included in one axial molecule.
- the cyclic molecule is cyclic.
- the number of molecular inclusions is preferably in the range of 0.001 to 0.6, more preferably 0.002 to 0.5, and still more preferably 0.003 to 0.4.
- the (C2-3) polyrotaxane monomer used in the present invention is a polyrotaxane compound in which a side chain having an OH group (hydroxyl group) is introduced into the above-described cyclic molecule.
- the side chain is not particularly limited, but is preferably formed by repeating an organic chain having an OH group and having 3 to 20 carbon atoms.
- the average molecular weight of such side chains is preferably in the range of 300 to 10,000, more preferably in the range of 350 to 8,000, still more preferably in the range of 350 to 5,000, and most preferably in the range of 400 to 1,500. is there.
- the side chain as described above is introduced by modifying a functional group of the cyclic molecule.
- the ⁇ -cyclodextrin ring has 18 OH groups (hydroxyl groups) as functional groups, side chains are introduced via these OH groups. That is, a maximum of 18 side chains can be introduced into one ⁇ -cyclodextrin ring.
- the side chain (organic chain) as described above may be linear or branched as long as it has an OH group in the organic chain.
- side chains derived from cyclic compounds such as lactones and cyclic ethers can be introduced by ring-opening polymerization.
- an OH group is introduced at the end of the side chain.
- a compound suitably used for introducing a side chain is a lactone compound.
- lactone compound examples thereof are ⁇ -caprolactone, ⁇ -acetyl- ⁇ -butyrolactone, ⁇ -methyl- ⁇ -butyrolactone, ⁇ -valerolactone, ⁇ -butyrolactone and the like, and ⁇ -caprolactone is most preferable.
- a side chain is introduced by reacting a cyclic compound by ring-opening polymerization
- a functional group for example, a hydroxyl group
- a hydroxyl group bonded to the ring
- a large molecule can be reacted directly due to steric hindrance. It can be difficult.
- a low molecular weight compound such as propylene oxide
- a functional group rich in reactivity A means of introducing a side chain into the hydroxyl group by ring-opening polymerization of the aforementioned cyclic compound can be employed.
- the hydroxypropylated portion is also a part of the side chain.
- the compound having a polymerizable group is introduced using the side chain described above, and a compound that reacts with the OH group of the side chain can be used as appropriate.
- a compound that reacts with the OH group of the side chain can be used as appropriate.
- the compound itself which has this (meth) acrylate group considers compatibility with another component, it is preferable that it is a compound which does not have OH group in a molecule
- the modification ratio by the compound having a polymerizable group is such that three or more (meth) acrylate groups are present in one molecule.
- the other side chain and the hydroxyl group of the cyclic molecule may remain as they are, or may be modified with a group other than the polymerizable group.
- the component (C2-4) is a silsesquioxane monomer represented by the following formula (6).
- R 17 may be the same or different from each other, and are a hydrogen atom or an organic group, j is an integer of 15 to 50 representing the degree of polymerization; At least 10 R 17 are organic groups containing a (meth) acrylate group. )
- the weight average molecular weight of the component (C2-4) is preferably 3,000 to 8,000, and the (meth) acrylate equivalent is preferably 150 to 800.
- the average molecular weight of the component (C2-4) is a value measured by a gel permeation chromatography method (GPC method).
- the organic group containing a (meth) acrylate group in R 17 includes only a (meth) acrylate group (a polymerizable group (for example, (meth) acrylate) is directly bonded to a silicon atom). including.). Specific examples include (meth) acrylate groups, (meth) acryloxypropyl groups, (3- (meth) acryloxypropyl) dimethylsiloxy groups, and the like. Of these, a (meth) acryloxypropyl group is particularly preferred because it is easy to obtain raw materials for the production of the (C2-4) component and high film strength can be obtained while exhibiting excellent photochromic properties.
- R 17 in the above formula (6) is preferably a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, or a phenyl group when it is not an organic group containing a (meth) acrylate group.
- the (C2-4) component so that, on average, 10 or more (meth) acrylate groups are present in one molecule.
- 10 to 100 (meth) acrylate groups are preferably contained in one molecule, and more preferably 15 to 35.
- j represents the degree of polymerization and is an integer of 15 to 50.
- the silsesquioxane compound can have various structures such as a cage shape, a ladder shape, and a random shape, but the component (C2-4) used in the present invention is preferably a mixture having a plurality of structures.
- the component (C2-4) one type of monomer can be used, or a mixture of a plurality of monomers can be used. In the case of a mixture, the total mass of the mixture is regarded as the amount of component (C2-4).
- (C2-5) Polyfunctional (meth) acrylate monomer
- a compound in which the terminal of the polyester compound is modified with a (meth) acrylate group is preferable.
- Commercially available polyester (meth) acrylate compounds can be used depending on the molecular weight of the polyester compound as a raw material and the modification amount of the (meth) acrylate group.
- tetrafunctional polyester oligomer (molecular weight 2,500-3,500, Daicel UC, EB80, etc.), hexafunctional polyester oligomer (molecular weight 6,000-8,000, Daicel UC, EB450, etc.) , Hexafunctional polyester oligomer (molecular weight 45,000 to 55,000, Daicel UC, EB1830, etc.), tetrafunctional polyester oligomer (particularly Daiichi Kogyo Seiyaku Co., Ltd., GX8488B, etc. having a molecular weight of 10,000) and the like. .
- component (C2) ((C2-1) component, (C2-2) component, (C2-3) component, (C2-4) component, (C2-5) component) exemplified above.
- the crosslink density is improved by polymerization, and the surface hardness of the resulting cured product can be increased. Therefore, in particular, when a photochromic cured body (laminated body) obtained by a coating method is used, it is preferable to include a component (C2). In particular, it is preferable to use the component (C2-1) among the components (C2).
- (C2-1) component, (C2-2) component, (C2-3) component, (C2-4) component and (C2-5) component individual components in each component can be used.
- a plurality of types described above can also be used.
- the mass serving as a reference for the component (C2) is the total amount of the plurality of types.
- R 18 is a hydrogen atom or a methyl group
- R 19 is a hydrogen atom, a methyldimethoxysilyl group or a trimethoxysilyl group
- k is an integer from 0 to 10
- l is an integer of 0 to 20.
- Examples of the compound represented by the formula (7) include methoxypolyethylene glycol methacrylate (particularly average molecular weight 293), methoxypolyethylene glycol methacrylate (particularly average molecular weight 468), methoxypolyethylene glycol acrylate (particularly average molecular weight 218), and methoxypolyethylene glycol acrylate.
- stearyl methacrylate (Especially average molecular weight 454), stearyl methacrylate, lauryl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, octyl acrylate, lauryl acrylate, ⁇ -methacryloyloxypropyltrimethoxysilane, ⁇ -methacryloyloxypropylmethyldimethoxysilane it can.
- the polymerizable monomer (C) preferably contains the component (C1), the component (C2), and, if necessary, the component (C3).
- each component is determined in consideration of the photochromic properties such as hardness, mechanical properties, color density, and fading speed of the resulting photochromic cured product (C1).
- the component is preferably 30 to 90 parts by mass, the component (C2) 5 to 50 parts by mass, and the component (C3) 0 to 20 parts by mass.
- each component contains the hardness, mechanical properties, color density, and color fading rate of the resulting photochromic cured product.
- the component (A) is 0.1 to 5 parts by mass and the component (B) is 0.001 to 10 parts by mass.
- the component (B) is 1 to 400 parts by mass with respect to 100 parts by mass of the component (A).
- the photochromic curable composition of the present invention comprises the above component (A), component (B), and component (C) as essential components.
- the photochromic curable composition may contain known additives.
- various stabilizers and additives such as surfactants, mold release agents, ultraviolet absorbers, infrared absorbers, ultraviolet stabilizers, antioxidants, anti-coloring agents, antistatic agents, fluorescent dyes, dyes, pigments and fragrances
- the polymerization regulator can be mixed as necessary.
- an ultraviolet stabilizer because the durability of the photochromic compound can be further improved.
- a hindered amine light stabilizer a hindered phenol antioxidant, and a sulfur-based antioxidant can be suitably used.
- the hindered amine light stabilizer is not particularly limited, but bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate is particularly preferable from the viewpoint of preventing deterioration of the photochromic compound.
- commercially available under the trade names such as ADK STAB LA-52, LA-57, LA-62, LA-63, LA-67, LA-77, LA-82 and LA-87 by Asahi Denka Kogyo Co., Ltd.
- Hindered amine light stabilizers can also be suitably used.
- hindered phenol antioxidant it is preferable from the viewpoint of preventing deterioration of the photochromic compound.
- IRGANOX 1076 (registered trademark) manufactured by BASF Japan Ltd .: octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, IRGANOX 1010 (registered trademark) manufactured by BASF Japan Ltd .: Penta Erythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], IRGANOX 1035, 1075, 1098, 1135, 1141, 1222, 133 manufactured by BASF Japan Ltd. , Mention may be made of 1425,1520,259,3114,3790,5057,565 (registered trademark), and the like.
- the amount of the ultraviolet stabilizer used is 0.01 to 20 parts by mass, more preferably 0.1 to 10 parts by mass, with the total amount of component (A) and component (C) being 100 parts by mass. is there.
- thiols such as t-decyl mercaptan can be added.
- a polymerizable monomer such as a vinyl monomer can also be added.
- a vinyl monomer a known compound can be used without any limitation. Among them, compounding a compound that acts as a polymerization regulator is suitable for improving the moldability of the photochromic curable composition.
- the vinyl monomer include ⁇ -methylstyrene and ⁇ -methylstyrene dimer, and it is particularly preferable to combine ⁇ -methylstyrene and ⁇ -methylstyrene dimer.
- the surfactant examples include known surfactants such as a silicone surfactant having a silicone chain (polyalkylsiloxane unit) as a hydrophobic group and a fluorine surfactant having a fluorocarbon chain.
- a surfactant when forming the photochromic coating layer of the present invention by the coating method, the adhesiveness on the optical substrate and the optical substrate is improved without adversely affecting the photochromic properties and adhesion. It is possible to improve the wettability with respect to the primer formed for the purpose of preventing the occurrence of poor appearance.
- silicone surfactants and fluorine surfactants that can be suitably used in the present invention include “L-7001”, “L-7002”, “L-7604”, “FZ” manufactured by Toray Dow Corning Co., Ltd. -2123 ”,“ Megafac F-470 ”,“ Megafac F-1405 ”,“ Megafac F-479 ”manufactured by Dainippon Ink and Chemicals, Ltd.,“ Florad FC-430 ”manufactured by Sumitomo 3M be able to.
- two or more kinds may be mixed and used.
- a known radical polymerization method can be employed as a method for obtaining a cured product from the photochromic curable composition. Specifically, it can be carried out by using radical polymerization initiators such as various peroxides and azo compounds, or by irradiation with ultraviolet rays (UV rays), ⁇ rays, ⁇ rays, ⁇ rays, or a combination thereof. .
- radical polymerization initiators such as various peroxides and azo compounds
- UV rays ultraviolet rays
- ⁇ rays ⁇ rays
- ⁇ rays irradiation with ultraviolet rays
- a known method can be adopted as a method for obtaining the laminate.
- a layer made of a photochromic curable composition may be present on a plastic substrate, and the curable composition may be polymerized and cured.
- a method for polymerizing the photochromic curable composition it can be carried out by heat, irradiation with ultraviolet rays (UV rays), ⁇ rays, ⁇ rays, ⁇ rays or the like, or a combination of both. Under the present circumstances, it is preferable to mix
- blend radical polymerization initiators such as the following thermal polymerization initiator and a photoinitiator
- the amount of the polymerization initiator used is preferably 0.001 to 10 parts by mass, preferably 100 parts by mass of the total amount of the components (A) and (C).
- the range is preferably 0.01 to 5 parts by mass.
- typical polymerization initiators include thermal polymerization initiators such as diacyl peroxides such as benzoyl peroxide, p-chlorobenzoyl peroxide, decanoyl peroxide, lauroyl peroxide, and acetyl peroxide; t-butyl Peroxyesters such as peroxy-2-ethylhexanate, t-butylperoxyneodecanate, cumylperoxyneodecanate, t-butylperoxybenzoate; diisopropylperoxydicarbonate, di-sec-butylperoxy Examples include percarbonates such as dicarbonates; azo compounds such as azobisisobutyronitrile.
- the temperature affects the properties of the resulting photochromic cured product / laminate.
- This temperature condition is affected by the type and amount of the thermal polymerization initiator and the type of monomer, so it cannot be limited in general, but in general, the polymerization is started at a relatively low temperature, and the temperature is slowly increased. It is preferable to perform so-called taper type polymerization, which is cured at a high temperature at the end. Since the polymerization time varies depending on various factors as well as the temperature, it is preferable to determine the optimal time according to these conditions in advance. The conditions are preferably selected so that the polymerization is completed in 2 to 24 hours.
- compounds such as acetophenone and acylphosphine compounds can be employed.
- ⁇ -dicarbonyl compounds such as 1,2-diphenylethanedione and methylphenylglycoxylate; 2,
- UV intensity affects the properties of the resulting photochromic cured product / laminate.
- This illuminance condition is influenced by the type and amount of the photopolymerization initiator and the type of monomer, and thus cannot be limited in general.
- UV light of 50 to 500 mW / cm 2 at a wavelength of 365 nm is set to a value of 0.0. It is preferable to select conditions so that light is irradiated in a time of 5 to 5 minutes.
- thermal polymerization initiator and a photopolymerization initiator can be used in combination.
- a photopolymerization initiator a known polymerization accelerator such as a tertiary amine can be used in combination.
- the optical substrate is not particularly limited, and a known substrate can be used.
- the layer of the above cured body of the photochromic laminate having a layer of the cured body of the photochromic curable composition on these optical substrates is also included in the photochromic cured body of the present invention.
- optical base material examples include (meth) acrylic resin, polycarbonate resin, allyl resin, thiourethane resin, urethane resin, thioepoxy resin, and glass.
- any optical base material is used. Is also applicable.
- the present invention can also be applied to a lens substrate in which a hard coat layer or the like is laminated on these optical substrates.
- the optical substrate is subjected to chemical treatment with an alkali solution, acid solution, etc., physical treatment by corona discharge, plasma discharge, polishing, etc. And the adhesion of the optical substrate can be improved.
- a primer such as polyurethane, polyester, polyvinyl acetal or epoxy.
- a photochromic laminated body by a coating method can be obtained by performing UV irradiation after being set in.
- a heat treatment at a temperature range of 80 to 120 ° C. for about 0.5 to 5 hours.
- the thickness of the photochromic coating layer formed by the coating method is not particularly limited, but is preferably 10 to 70 ⁇ m.
- the photochromic cured product and the photochromic laminate obtained in this manner can be used as they are as a photochromic optical material, but they are usually used by being further coated with a hard coat layer. Thereby, the scratch resistance of the photochromic optical material can be improved.
- the coating agent (hard coat agent) for forming the hard coat layer known ones can be used without any limitation. Specifically, a hard coat agent mainly composed of a silane coupling agent or an oxide sol such as silicon, zirconium, antimony, aluminum, titanium, or a hard coat agent mainly composed of an organic polymer can be used. .
- the coating of the hard coating agent onto the coated photochromic optical material is preferably performed by the same operation as that for coating the optical substrate with the photochromic curable composition.
- pretreatment of the photochromic optical material that is, pretreatment of impregnating the photochromic optical material into an alkaline solution such as an aqueous solution of sodium hydroxide or aqueous potassium hydroxide, or superimposing the photochromic optical material in an alkaline solution
- the hard coating agent can be applied to the surface of the optical material by the known method described above.
- the coated hard coat agent can be cured by a known method, for example, by heating, to form a hard coat layer.
- the photochromic cured product obtained by the above method, or an optical article in which a hard coat layer is further formed on the cured product is a vapor deposition of a metal oxide thin film such as SiO 2 , TiO 2 , ZrO 2 , or an organic polymer. It is also possible to perform processing such as antireflection treatment and antistatic treatment by applying a thin film and secondary treatment.
- Each photochromic property was evaluated by the following method, and the results are shown in the corresponding table.
- ⁇ max It is the maximum absorption wavelength after color development determined by a spectrophotometer (instant multichannel photodetector MCPD1000) manufactured by Otsuka Electronics Co., Ltd.
- the maximum absorption wavelength is related to the color tone at the time of color development.
- Color density ⁇ (300) ⁇ (0) ⁇ Difference between absorbance ⁇ (300) ⁇ after light irradiation for 300 seconds and absorbance ⁇ (0) before light irradiation at the maximum absorption wavelength. It can be said that the higher this value, the better the photochromic properties.
- Component (A) radical polymerizable monomer having at least one oxetanyl group in one molecule.
- OXE-30 (3-ethyl-3-oxetanyl) methyl methacrylate.
- (C) Radical polymerizable monomer (C1-1) Component A-200: Tetraethylene glycol diacrylate. A-400: polyethylene glycol diacrylate (average chain length of ethylene glycol chain is 9, average molecular weight is 536). -4G: Tetraethylene glycol dimethacrylate. 14G: Polyethylene glycol dimethacrylate (the average chain length of the ethylene glycol chain is 14 and the average molecular weight is 736).
- Component (C1-2) BPE100: 2,2-bis [4- (methacryloxyethoxy) phenyl] propane (average chain length of ethylene glycol chain is 2.6, average molecular weight is 478).
- A-BPE-10 ethoxylated bisphenol A diacrylate (average chain length of ethylene glycol chain is 10 and average molecular weight is 776).
- KT50 ethoxylated bisphenol A dimethacrylate (average chain length of ethylene glycol chain is 10 and average molecular weight is 804).
- A-PC An ester compound of polycarbonate diol (average molecular weight 500) and acrylic acid obtained by phosgenation of pentamethylene glycol and hexamethylene glycol.
- Component (C2-1) TMPT trimethylolpropane trimethacrylate.
- silsesquioxane monomer S21
- the organic layer was washed with water until the aqueous layer became neutral, and the solvent was concentrated to obtain a silsesquioxane monomer (S21). From 1 H-NMR, it was confirmed that the raw material was completely consumed. 29 Si-NMR confirmed that this was a mixture of cage-like structure, ladder-like structure and random structure.
- the molecular weight of the silsesquioxane monomer (PMS1) was measured by a gel permeation chromatography method (GPC method), the weight average molecular weight was 3,800.
- the methacrylic equivalent was about 178 (an average of 178 methacrylic groups are present in one molecule).
- (C3) Component GMA Glycidyl methacrylate (However, it is a comparative component. Since it is a component having one methacryl group in the molecule, it is described as the (C3) component).
- TSL8370 ⁇ -methacryloyloxypropyltrimethoxysilane.
- HALS bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate.
- HP ethylenebis (oxyethylene) bis [3- (5-tert-butyl-4-hydroxy-m-tolyl) propionate].
- ND t-butyl peroxyneodecanoate.
- PI phenylbis (2,4,6-trimethylbenzoyl) -phosphine oxide.
- Leveling agent L7001 Polyether-modified silicone (manufactured by Dow Corning Toray)
- the slurry reagent obtained above was allowed to stand at 4 ° C. for 12 hours. Thereafter, 50 ml of a DMF / methanol mixed solvent (volume ratio 1/1) was added, mixed and centrifuged, and the supernatant was discarded. Further, after washing with the above DMF / methanol mixed solution, washing with methanol and centrifugation were performed to obtain a precipitate.
- the obtained precipitate was dried by vacuum drying and then dissolved in 50 mL of DMSO, and the obtained transparent solution was dropped into 700 mL of water to precipitate polyrotaxane. The precipitated polyrotaxane was collected by centrifugation and vacuum dried. Further, it was dissolved in DMSO, precipitated in water, collected and dried to obtain a purified polyrotaxane.
- the inclusion amount of ⁇ -CD at this time is 0.25.
- the modification degree of the cyclic molecule to the OH group by the hydroxypropyl group was 0.5, and the weight average molecular weight Mw was 180,000 by GPC measurement.
- a mixed solution was prepared by dissolving 5 g of the obtained hydroxypropylated polyrotaxane in 15.0 g of ⁇ -caprolactone at 80 ° C. The mixture was stirred at 110 ° C. for 1 hour while blowing dry nitrogen, 0.16 g of a 50 wt% xylene solution of tin (II) 2-ethylhexanoate was added, and the mixture was stirred at 130 ° C. for 6 hours. Thereafter, xylene was added to obtain a polycaprolactone-modified polyrotaxane xylene solution into which a side chain having a nonvolatile concentration of about 35% by mass was introduced.
- This acrylate group-introduced side chain modified polyrotaxane monomer (T15) was used as the component (C2-3).
- the physical properties were as follows. Side chain molecular weight: about 400 on average. Polyrotaxane monomer weight average molecular weight Mw (GPC): 200,000. Acrylate group Modification rate: 81 mol%. Remaining OH group ratio: 19 mol%.
- Hard coat agent 1 was prepared according to the following method. Manufacture of hard coating agent 1 13.86 parts by mass of ⁇ -glycidoxyethyltrimethoxysilane, 11.16 parts by mass of methyltriethoxysilane, 0.059 mass of silicone surfactant (L7001 manufactured by Toray Dow Corning Co., Ltd.) Then, 4.2 parts by mass of ethylene glycol isopropyl ether, 2.98 parts by mass of acetylacetone, and 9.77 parts by mass of t-butyl alcohol were added and mixed with stirring for 30 minutes.
- silicone surfactant L7001 manufactured by Toray Dow Corning Co., Ltd.
- Example 1 Production and Evaluation of Photochromic Cured Product
- B 0.04 parts by mass of photochromic compound PC1 and 1 part by mass of ND as a polymerization initiator are added to a mixture of polymerizable monomers consisting of 1.8 parts by mass of MSD and 1.8 parts by mass of MSD.
- a photochromic curable composition was produced. Table 1 summarizes the blending ratios.
- the photochromic curable composition which is a mixed solution, was injected into a mold composed of a glass plate and a gasket made of an ethylene-vinyl acetate copolymer, and substantially all of the monomer was polymerized by cast polymerization. .
- an air furnace was used, and the temperature was gradually raised from 30 ° C. to 85 ° C. over 18 hours and kept at 85 ° C. for 2 hours.
- the cured product was removed from the mold glass mold to obtain a photochromic cured product (2 mm thick).
- the obtained photochromic cured product was evaluated for photochromic properties, storage stability, and durability. The evaluation results are shown in Table 2.
- the photochromic cured product produced by the above method was immersed in a 20% by mass aqueous sodium hydroxide solution at 50 ° C., and alkali etching was performed for 5 minutes using an ultrasonic cleaner. After alkali etching, the substrate was washed successively with tap water and distilled water at 50 ° C. to remove the remaining alkali and then left for about 10 minutes until the temperature reached room temperature.
- the lens substrate (photochromic cured product) was dip-coated with the hard coating agent 1 produced by the above method at 25 ° C. at a pulling rate of 15 cm / min.
- Reference Example 1 and Comparative Example 1 A photochromic cured product was prepared in the same manner as in Example 1 except that a photochromic curable composition having the blending ratio shown in Table 1 was prepared, and the photochromic properties, storage stability, and durability were evaluated. In addition, a hard coat lens was prepared using the obtained photochromic cured product, and a boiling adhesion test was performed in the same manner as in Example 1. The results are shown in Table 2.
- Example 2 OXE-30 1 part by mass, (C1-1) 14G 45 parts by mass, (C1-2) A-PC 11 parts by mass, (C2-1) TMPT 40 parts by mass, A mixture of polymerizable monomers consisting of C2-3) T15 3 parts by mass, (C3) TSL8370 6.5 parts by mass, (B) 0.25 parts by mass of photochromic compound PC2, 1.4 parts by mass of PC3, PC4 0.8 parts by mass, 0.15 parts by mass of PC5, 0.3 parts by mass of PC6, 3 parts by mass of HALS as a stabilizer, 1 part by mass of HP, 0.3 parts by mass of PI as a polymerization initiator, and L7001 as a leveling agent. 1 part by mass was added and mixed well to produce a photochromic curable composition. Table 3 summarizes the blending ratios.
- a photochromic laminate was obtained by a lamination method.
- the polymerization method is shown below.
- a thiourethane plastic lens having a center thickness of 2 mm and a refractive index of 1.60 was prepared as an optical substrate.
- This thiourethane plastic lens was previously alkali-etched at 50 ° C. for 5 minutes using a 10% aqueous sodium hydroxide solution, and then thoroughly washed with distilled water.
- a moisture curing primer product name: TR-SC-P, manufactured by Tokuyama Co., Ltd.
- TR-SC-P moisture curing primer
- the lens having the coating agent coated on the surface was irradiated with light for 90 seconds in a nitrogen gas atmosphere using a metal halide lamp with an output of 200 mW / cm 2 to cure the coating film. Thereafter, the mixture was further heated at 110 ° C. for 1 hour to produce a photochromic laminate having a photochromic layer.
- the obtained photochromic laminate was evaluated for photochromic properties, storage stability, and durability. The evaluation results are shown in Table 4.
- Example 4 Further, a hard coat layer was laminated on the obtained photochromic laminate in the same manner as in Example 1 to obtain a hard coat lens. A boiling adhesion test was performed using the obtained hard coat lens. The results are shown in Table 4.
- Example 2 and Comparative Example 2 A photochromic laminate was prepared in the same manner as in Example 2 except that a photochromic curable composition having the blending ratio shown in Table 3 was prepared, and the photochromic properties, storage stability, and durability were evaluated. Moreover, a hard coat lens was produced using the obtained photochromic laminate, and a boiling adhesion test was performed in the same manner as in Example 2. The results are shown in Table 4.
- Example 3 Production and Evaluation of Photochromic Laminate
- Table 5 summarizes the blending ratios.
- a photochromic laminate was obtained by the lamination method in the same manner as in Example 2.
- the obtained photochromic laminate was evaluated for photochromic properties, storage stability, and durability. The evaluation results are shown in Table 6.
- Example 6 Further, a hard coat layer was laminated on the obtained photochromic laminate in the same manner as in Example 1 to obtain a hard coat lens. A boiling adhesion test was performed using the obtained hard coat lens. The results are shown in Table 6.
- Example 3 Comparative Example 3 A photochromic laminate was prepared in the same manner as in Example 3 except that a photochromic curable composition having the blending ratio shown in Table 5 was prepared, and the photochromic characteristics, storage stability, and durability were evaluated. Moreover, a hard coat lens was produced using the obtained photochromic laminate, and a boiling adhesion test was performed in the same manner as in Example 2. The results are shown in Table 6.
- a photochromic cured product (thickness 2 mm) was obtained in the same manner as in Example 1.
- the obtained photochromic cured product was evaluated for photochromic properties, storage stability, and durability. The evaluation results are shown in Table 8.
- Example 8 Further, a hard coat layer was laminated on the obtained photochromic cured product in the same manner as in Example 1 to obtain a hard coat lens. A boiling adhesion test was performed using the obtained hard coat lens. The results are shown in Table 8.
- Examples 5 to 7, Comparative Example 4, Reference Examples 4 to 7 A photochromic cured product was prepared in the same manner as in Example 4 except that a photochromic curable composition having the blending ratio shown in Table 7 was prepared, and the photochromic properties, storage stability, and durability were evaluated. In addition, a hard coat lens was prepared using the obtained photochromic laminate, and a boiling adhesion test was performed in the same manner as in Example 4. The results are shown in Table 8.
- Example 8 Production and Evaluation of Photochromic Laminate
- A OXE-30 1 part by mass, (C1-1) 14G 46.5 parts by mass, (C1-2) A-PC 11.5 parts by mass, (C2-1) TMPT 41
- B 0.5 part by mass of photochromic compound PC7, 3 parts by mass of HALS as a stabilizer, 1 part by mass of HP, 0.3 parts by mass of PI as a polymerization initiator, As a leveling agent, 0.1 part by mass of L7001 was added and mixed well to produce a photochromic curable composition.
- Table 9 summarizes the blending ratios.
- a photochromic laminate was obtained by the lamination method in the same manner as in Example 2.
- the obtained photochromic laminate was evaluated for photochromic properties, storage stability, and durability. The evaluation results are shown in Table 10.
- Example 10 Further, a hard coat layer was laminated on the obtained photochromic laminate in the same manner as in Example 1 to obtain a hard coat lens. A boiling adhesion test was performed using the obtained hard coat lens. The results are shown in Table 10.
- Examples 9 to 11, Comparative Example 5, Reference Examples 8 to 11 A photochromic laminate was prepared in the same manner as in Example 8 except that a photochromic curable composition having the blending ratio shown in Table 9 was prepared, and photochromic properties and storage stability were evaluated. Moreover, a hard coat lens was produced using the obtained photochromic laminate, and a boiling adhesion test was performed in the same manner as in Example 2. The results are shown in Table 10.
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Abstract
Description
(a)重合性モノマーにフォトクロミック化合物を溶解させ、それを重合させることにより、直接、レンズ等の光学材料を成形する方法。この方法は、練り込み法と呼ばれている。
(b)レンズ等のプラスチック成形品の表面に、フォトクロミック化合物が分散された樹脂層を、コーティング或いは注型重合により設ける方法。この方法は、積層法と呼ばれている。
(I)紫外線を照射する前の可視光領域での着色度(初期着色)が低いこと。
(II)紫外線を照射した時の着色度(発色濃度)が高いこと。
(III)紫外線の照射を止めてから元の状態に戻るまでの速度(退色速度)が速いこと。
(IV)発色~退色の可逆作用の繰り返し耐久性がよいこと。
(V)保存安定性が高いこと。
(VI)光学物品として成形しやすく、ハードコート膜の形成などの後加工が容易であること。
(VII)機械的強度が低下することなく、フォトクロミック性が付与されること。
しかしながら、特許文献2に記載されている通り、エポキシ基を有するラジカル重合性単量体を、多量に使用したり、特定のクロメン化合物と組み合わせると、得られるフォトクロミック硬化体の経時的な色調の変化が見られることが知られている。また、エポキシ基を有するラジカル重合性単量体の中でも、GMAは、変異原性・発がん性物質の可能性があり、その使用を避けることが求められている。
そのため、フォトクロミック硬化体としては、エポキシ基を有するラジカル重合性単量体(特に、「GMA」)を使用することなく、それを使用した場合の硬化性組成物から得られた硬化体の物性と少なくとも同等の物性を発揮するものが望まれている。
本発明の他の目的および利点は以下の説明から明らかになろう。
(A)一分子中に少なくとも一つのオキセタニル基を有するラジカル重合性単量体(以下、単に(A)成分とする場合もある)、
(B)フォトクロミック化合物(以下、単に(B)成分とする場合もある)、および
(C)上記(A)成分以外のラジカル重合性単量体(以下、単に(C)成分とする場合もある)
を含有してなることを特徴とするフォトクロミック硬化性組成物である。
本発明においては、(A)成分である少なくとも一つのオキセタニル基を有するラジカル重合性単量体成分を含むことを特徴とする。この(A)成分を配合することにより、フォトクロミック特性に優れ、ハードコートとの密着性が良好なフォトクロミック硬化体及びフォトクロミック積層体を形成できる。以下、具体的に(A)成分について説明する。
R6は、水素原子またはメチル基であり、
R7およびR8は、それぞれ独立に、直鎖状または分岐鎖状の炭素数1~4のアルキレン基であり、
R9は直鎖状または分岐鎖状の炭素数1~4のアルキル基であり、そして
eおよびfは、それぞれ、平均値で0~20の数である。
次に(B)成分であるフォトクロミック化合物について説明する。
本発明のフォトクロミック硬化性組成物は、前記(A)成分以外に、(A)成分とは異なる重合性単量体((C)成分)を含む。
本発明のフォトクロミック硬化性組成物は、(C1)2官能(メタ)アクリレートモノマーを含むことが好ましい。以下に、その具体例を示す。具体的には、下記式(1)、(4)および(5)に示す化合物である。この中でも、特に、下記式(1)で示される2官能(メタ)アクリレートモノマー成分であって、分子量が300~2000のポリアルキレングリコールジ(メタ)アクリレートモノマーを含むことが好ましい。
R12及びR13は、それぞれ、水素原子またはメチル基であり、
R14は、それぞれ、水素原子またはハロゲン原子であり、
Bは、-O-,-S-,-(SO2)-,-CO-,-CH2-,-CH=CH-,-C(CH3)2-,-C(CH3)(C6H5)-の何れかであり、
g及びhは、それぞれ、1以上29以下の整数であり、g+hは平均値で2以上30以下の整数である。
2,2-ビス[4-メタクリロイルオキシ・エトキシ)フェニル]プロパン
(g+h=2)、
2,2-ビス[4-メタクリロイルオキシ・ジエトキシ)フェニル]プロパン
(g+h=4)、
2,2-ビス[4-メタクリロイルオキシ・ポリエトキシ)フェニル]プロパン
(g+h=7)、
2,2-ビス(3,5-ジブロモ-4-メタクリロイルオキシエトキシフェニル)プロパン(g+h=2)、
2,2-ビス(4-メタクリロイルオキシジプロポキシフェニル)プロパン
(g+h=4)、
2,2-ビス[4-アクリロイルオキシ・ジエトキシ)フェニル]プロパン
(g+h=4)、
2,2-ビス[4-アクリロイルオキシ・ポリエトキシ)フェニル]プロパン
(g+h=3)、
2,2-ビス[4-アクリロイルオキシ・ポリエトキシ)フェニル]プロパン
(g+h=7)、
2,2-ビス[4-メタクリロイルキシ(ポリエトキシ)フェニル]プロパン
(g+h=10)、
2,2-ビス[4-メタクリロイルキシ(ポリエトキシ)フェニル]プロパン
(g+h=17)、
2,2-ビス[4-メタクリロイルキシ(ポリエトキシ)フェニル]プロパン
(g+h=30)、
2,2-ビス[4-アクリロイルキシ(ポリエトキシ)フェニル]プロパン
(g+h=10)、
2,2-ビス[4-アクリロイルキシ(ポリエトキシ)フェニル]プロパン
(g+h=20)。
iは平均値で1~20の数であり、
A及びA’は、互いに同一でも異なっていてもよく、それぞれ炭素数2~15の直鎖状または分岐状のアルキレン基であり、Aが複数存在する場合には、複数のAは同一の基であっても、異なる基であってもよい。
2種以上のポリアルキレングリコールの混合物、例えば、トリメチレングリコールとテトラメチレングリコールの混合物、テトラメチレングリコールとヘキサメチレンジグリコールの混合物、ペンタメチレングリコールとヘキサメチレングリコールの混合物、テトラメチレングリコールとオクタメチレングリコールの混合物、ヘキサメチレングリコールとオクタメチレングリコールの混合物等のホスゲン化で得られるポリカーボネートジオール(数平均分子量500~2,000);
1-メチルトリメチレングリコールのホスゲン化で得られるポリカーボネートジオール(数平均分子量500~2,000)。
次に、その他の(C)成分について説明する。
(C1-4)成分は、ポリオールとポリイソシアネートとの反応物が代表的である。ここで、ポリイソシアネートとしては、例えば、ヘキサメチレンジイソシアネート、イソホロンジイソシアネート、リジンイソシアネート、2,2,4-ヘキサメチレンジイソシアネート、ダイマー酸ジイソシアネート、イソプロピリデンビス-4-シクロヘキシルイソシアネート、ジシクロヘキシルメタンジイソシアネート、ノルボルネンジイソシアネートまたはメチルシクロヘキサンジイソシアネートを挙げることができる。
(C1-5)成分としては、置換基を有していてもよいアルキレン基の両末端に(メタ)アクリレート基を有する化合物などが挙げられる。(C1-5)成分としては、炭素数6~20のアルキレン基を有するものが好ましい。具体的には、1,6-ヘキサンジオールジアクリレート、1,6-ヘキサンジオールジメタクリレート、1,9-ノナンジオールジアクリレート、1,9-ノナンジオールジメタクリレート、1,10-デカンジオールジアクリレート、1,10-デカンジオールジメタクリレート等が挙げられる。
次に、(C2)多官能(メタ)アクリレートモノマーについて説明する。
(C2)成分としては、下記式(2)で示される化合物(以下、単に(C2-1)成分とする場合もある)、ウレタン結合を有する多官能(メタ)アクリレートモノマー(以下、単に(C2-2)成分とする場合もある)、ポリロタキサンモノマー(以下、単に(C2-3)成分とする場合もある)、シルセスキオキサンモノマー(以下、単に(C2-4)成分とする場合もある)、並びに、前記(C2-1)成分、および前記(C2-2)成分に該当しない多官能(メタ)アクリレートモノマー(以下、単に(C2-5)成分とする場合もある)が挙げられる。その中でも、得られるフォトクロミック硬化体の特性を制御し易いという点から、前記(C2-1)成分を必須成分とすることが好ましい。
多官能(メタ)アクリレートモノマーとしては、下記式(2)で示される化合物が挙げられる。
R4は、水素原子または炭素数1~2のアルキル基であり、
R5は、炭素原子、炭素数1~10の3~6価の炭化水素基、または酸素原子を含む炭素数3~6の有機基であり、
cは、平均値で0~3の数であり、dは3~6の整数である。
(C2-2)成分は、(C1-4)成分で説明したポリイソシアネート化合物とポリオール化合物を反応させて得られるものであり、分子中に3つ以上の(メタ)アクリレート基を有する化合物である。市販品として、新中村化学工業(株)製のU-4HA(分子量596、官能基数4)、U-6HA(分子量1,019、官能基数6)、U-6LPA(分子量818、官能基数6)、U-15HA(分子量2,300、官能基数15)を挙げることができる。
ポリロタキサンモノマーは、
環状分子と、
該環状分子の環内を貫通し、該環が脱離しない様に、両末端に嵩高い基を有する軸分子とからなる複合分子構造を有し、且つ、分子内に3つ以上の(メタ)アクリレート基を有するモノマーである。
(C2-4)成分は、下記式(6)で示される、シルセスキオキサンモノマーである。
複数個あるR17は、互いに同一もしくは異なっていてもよく、水素原子または有機基であり、
jは、重合度を表わす、15~50の整数であり、
少なくとも10個のR17は、(メタ)アクリレート基を含む有機基である。)
(C2-5)成分としては、ポリエステル化合物の末端を(メタ)アクリレート基で修飾した化合物が好ましい。原料となるポリエステル化合物の分子量や(メタ)アクリレート基の修飾量により種々のポリエステル(メタ)アクリレート化合物として市販されているものを使用することができる。具体的には、4官能ポリエステルオリゴマー(分子量2,500~3,500、ダイセルユーシービー社、EB80等)、6官能ポリエステルオリゴマー(分子量6,000~8,000、ダイセルユーシービー社、EB450等)、6官能ポリエステルオリゴマー(分子量45,000~55,000、ダイセルユーシービー社、EB1830等)、4官能ポリエステルオリゴマー(特に分子量10,000の第一工業製薬社、GX8488B等)等を挙げることができる。
次に、(C3)単官能(メタ)アクリレートモノマーについて説明する。
(C3)成分としては、下記式(7)で示される化合物が挙げられる。
R19は、水素原子、メチルジメトキシシリル基またはトリメトキシシリル基であり、
kは、0~10の整数であり、
lは、0~20の整数である。
(C)重合性単量体は、前記(C1)成分、前記(C2)成分、必要に応じて、前記(C3)成分を含むことが好ましい。前記(C)成分の全量を100質量部としたとき、各成分は、得られるフォトクロミック硬化体の硬度、機械的特性、並びに、発色濃度、および退色速度といったフォトクロミック特性を考慮すると、前記(C1)成分30~90質量部、前記(C2)成分5~50質量部、前記(C3)成分0~20質量部とすることが好ましい。
本発明のフォトクロミック硬化性組成物においては、前記(C)成分の全量を100質量部としたとき、各成分は、得られるフォトクロミック硬化体の硬度、機械的特性、並びに、発色濃度、および退色速度といったフォトクロミック特性を考慮すると、前記(A)成分0.1~5質量部、前記(B)成分0.001~10質量部とすることが好ましい。中でもより優れたフォトクロミック特性を発揮するためには、(A)成分100質量部に対して、(B)成分が1~400質量部であることがより好ましい。
本発明のフォトクロミック硬化性組成物は、以上の(A)成分、(B)成分、および(C)成分を必須成分とするものである。該フォトクロミック硬化性組成物は、公知の添加剤を配合することができる。例えば、界面活性剤、離型剤、紫外線吸収剤、赤外線吸収剤、紫外線安定剤、酸化防止剤、着色防止剤、帯電防止剤、蛍光染料、染料、顔料、香料等の各種安定剤、添加剤、重合調整剤を必要に応じて混合することができる。
フォトクロミック硬化性組成物から硬化体を得る方法としては、公知のラジカル重合方法を採用できる。具体的には、種々の過酸化物やアゾ化合物などのラジカル重合開始剤の使用、または、紫外線(UV線)、α線、β線、γ線等の照射あるいは両者の併用によって行うことができる。代表的な重合方法を例示すると、エラストマーガスケット又はスペーサーで保持されているモールド間に、ラジカル重合開始剤を混合した本発明のフォトクロミック硬化体組成物を注入し、空気炉中で重合させた後、取り外す注型重合が採用される。
コーティング法によりフォトクロミック積層体を製造する場合、光学基材上に、光重合開始剤を混合した本発明のフォトクロミック硬化体組成物をスピンコーティング法などにより塗布し、窒素などの不活性ガス中に設置した後に、UV照射を行うことで、コーティング法によるフォトクロミック積層体を得ることができる。そして、フォトクロミックコート層とプラスチック基材との密着性を高めるため、80~120℃の温度範囲で0.5~5時間程度加熱処理することが好ましい。こうすることにより、プラスチックレンズ基材/必要に応じて形成される、プライマーコート層/フォトクロミックコート層がこの順で積層されたフォトクロミック積層体を得ることができる。コーティング法で形成されるフォトクロミックコート層の厚みは、特に制限されるものではないが、10~70μmとすることが好ましい。
このようにして得られたフォトクロミック硬化体及びフォトクロミック積層体は、そのままフォトクロミック光学材料として使用することが可能であるが、通常は、さらにハードコート層で被覆して使用される。これにより、フォトクロミック光学材料の耐擦傷性を向上させることができる。
さらに、前記の方法で得られるフォトクロミック硬化体、あるいは該硬化体上にさらにハードコート層を形成した光学物品は、SiO2、TiO2、ZrO2等の金属酸化物の薄膜の蒸着や有機高分子の薄膜の塗布による反射防止処理、帯電防止処理等の加工および2次処理を施すことも可能である。
フォトクロミック硬化体/積層体に、(株)浜松ホトニクス製のキセノンランプL-2480(300W)SHL-100を、エアロマスフィルター(コーニング社製)を介して20℃±1℃、重合体表面でのビーム強度365nm=2.4mW/cm2、245nm=24μW/cm2で300秒間照射して発色させ、前記硬化体のフォトクロミック特性を測定した。各フォトクロミック特性を以下の方法で評価し、その結果を対応する表に示した。
(株)大塚電子工業製の分光光度計(瞬間マルチチャンネルフォトディテクターMCPD1000)により求めた発色後の最大吸収波長である。該最大吸収波長は発色時の色調に関係する。
前記最大吸収波長における、300秒間光照射した後の吸光度{ε(300)}と光照射前の吸光度ε(0)との差。この値が高いほどフォトクロミック性が優れているといえる。
300秒間光照射後、光の照射を止めたときに、試料の前記最大吸収波長における吸光度が{ε(300)-ε(0)}の1/2まで低下するのに要する時間。この時間が短いほどフォトクロミック性が優れているといえる。
光学物品(ハードコートレンズ)を沸騰させた蒸留水に入れ、1時間毎にハードコートレンズの密着性を評価した。試験評価は、試験前と試験1時間毎にハードコート膜とレンズの密着性をJIS D-0202に準じてクロスカットテープ試験によって行った。即ち、カッターナイフを使い、ハードコート膜面に約1mm間隔に切れ目を入れ、マス目を100個形成させる。その上にセロファン粘着テープ(ニチバン株式会社製セロテープ(登録商標))を強く貼り付け、次いで、表面から90°方向へ一気に引っ張り剥離した後、ハードコート膜が残っているマス目を測定した。評価結果は、対応する表に(残っているマス目数)/100で表している。
保存安定性の促進試験として、恒温恒湿槽にて、60℃/98%湿度でフォトクロミック硬化体/積層体を1週間保存し、発色時の色調変化を測定した。測定方法は、上記ε(300)のスペクトルをJIS(JISZ8729)に基づいて、L*a*b*表色系に変換し、赤さを示すa*の変化Δを以下の式から得た。
Δa*=a*(1週間後)-a*(初期)
Δa*の上昇度が高いほど、フォトクロミック硬化体/積層体が赤くなっていることを示す。本試験は実保存1年分に相当すると考えられる。
光照射による発色の耐久性の促進試験として、スガ試験器(株)製キセノンウェザーメーターX25により96時間促進劣化させた。その後、上記発色濃度の評価を試験前後で行い、試験前の発色濃度(A0)及び試験後の発色濃度(A96)から以下の式に従い残存率を得た。
残存率(%)=(A96/A0)×100
・OXE-30:(3-エチル-3-オキセタニル)メチルメタクリレート。
(C1-1)成分
・A-200:テトラエチレングリコールジアクリレート。
・A-400:ポリエチレングリコールジアクリレート(エチレングリコール鎖の平均鎖長が9であり、平均分子量が536)。
・4G:テトラエチレングリコールジメタクリレート。
・14G:ポリエチレングリコールジメタクリレート(エチレングリコール鎖の平均鎖長が14であり、平均分子量が736)。
・BPE100:2,2-ビス[4-(メタクリロキシエトキシ)フェニル]プロパン(エチレグリコール鎖の平均鎖長が、2.6であり、平均分子量が478)。
・A-BPE-10:エトキシ化ビスフェノールAジアクリレート(エチレグリコール鎖の平均鎖長が、10であり、平均分子量が776)。
・KT50:エトキシ化ビスフェノールAジメタクリレート(エチレグリコール鎖の平均鎖長が、10であり、平均分子量が804)。
・A-PC:ペンタメチレングリコールとヘキサメチレングリコールとのホスゲン化で得られるポリカーボネートジオール(平均分子量500)とアクリル酸のエステル化合物。
・TMPT:トリメチロールプロパントリメタクリレート。
・T15;ポリロタキサンモノマー 製造方法は下記<ポリロタキサンモノマーの準備>記載の通りである。一分子中、平均してアクリレート基が220個存在する。
・S21;シルセスキオキサンモノマー 製造方法は下記の通りである。
3-トリメトキシシリルプロピルメタクリレート248g(1.0mol)にエタノール196mlおよび水54g(3.0mol)を加え、触媒として水酸化ナトリウム0.20g(0.005mol)を添加し、45℃で3時間反応させた。原料の消失を確認後、希塩酸で中和し、トルエン174ml、ヘプタン174ml、および水174gを添加し、水層を除去した。その後、水層が中性になるまで有機層を水洗し、溶媒を濃縮することによってシルセスキオキサンモノマー(S21)を得た。なお、1H-NMRより、原料は完全に消費されていることを確認した。また、29Si-NMRより、ケージ状構造、ラダー状構造およびランダム構造の混合物であることを確認した。シルセスキオキサンモノマー(PMS1)の分子量を、ゲル浸透クロマトグラフィー法(GPC法)により測定したところ、重量平均分子量が3800であった。メタクリル当量は、約178であった(一分子中に、平均してメタクリル基が178個存在する)。
・GMA:グリシジルメタクリレート(ただし、比較成分。分子中にメタクリル基を1つ有する成分のため、(C3)成分として記載。)。
・TSL8370:γ-メタクリロイルオキシプロピルトリメトキシシラン。
・αMS:αメチルスチレン。
・MSD:αメチルスチレンダイマー。
(安定剤)
・HALS:ビス(1,2,2,6,6-ペンタメチル-4-ピペリジル)セバケート。
・HP:エチレンビス(オキシエチレン)ビス[3-(5-tert-ブチル-4-ヒドロキシ-m-トリル)プロピオネート]。
・ND:t-ブチルパーオキシネオデカノエート。
・PI:フェニルビス(2,4,6-トリメチルベンゾイル)-ホスフィンオキシド。
(レベリング剤)
・L7001:ポリエーテル変性シリコーン(東レ・ダウコーニング株式会社製)。
以下の方法に従い、ポリロタキサンモノマーT15を準備した。
製造例
(1)PEG-COOHの調製;
軸分子形成用のポリマーとして、分子量11,000の直鎖状ポリエチレングリコール(PEG)を用意した。
PEG 10g、
TEMPO (2,2,6,6-テトラメチル-1-ピペリジニルオキシラジカル)100mg
臭化ナトリウム 1g
を準備し、各成分を水100mLに溶解させた。この溶液に、市販の次亜塩素酸ナトリウム水溶液(有効塩素濃度5%)5mLを添加し、室温で10分間撹拌した。その後、エタノールを最大5mLまでの範囲で添加して反応を終了させた。そして、50mLの塩化メチレンを用いた抽出を行った後、塩化メチレンを留去し、250mLのエタノールに溶解させてから、-4℃の温度で12時間かけて再沈させ、PEG-COOHを回収し、乾燥した。
上記で調製されたPEG-COOH 3gおよびα-シクロデキストリン(α-CD)12gを、それぞれ、70℃の温水50mLに溶解させ、得られた各溶液を混合し、よく振り混ぜた。次いで、この混合溶液を、4℃の温度で12時間再沈させ、析出した包接錯体を凍結乾燥して回収した。その後、室温でジメチルホルムアミド(DMF)50mlに、アダマンタンアミン0.13gを溶解した後、上記の包接錯体を添加して速やかによく振り混ぜた。続いてBOP試薬(ベンゾトリアゾール-1-イル-オキシ-トリス(ジメチルアミノ)ホスホニウムヘキサフルオロホスフェート)0.38gをDMFに溶解した溶液をさらに添加して、よく振り混ぜた。さらにジイソプロピルエチルアミン0.14mlをDMFに溶解させた溶液を添加してよく振り混ぜてスラリー状の試薬を得た。
上記で精製されたポリロタキサン500mgを1mol/LのNaOH水溶液50mLに溶解し、プロピレンオキシド3.83g(66mmol)を添加し、アルゴン雰囲気下、室温で12時間撹拌した。次いで、1mol/LのHCl水溶液を用い、上記のポリロタキサン溶液を、pHが7~8となるように中和し、透析チューブにて透析した後、凍結乾燥し、ヒドロキシプロピル化ポリロタキサンを得た。得られたヒドロキシプロピル化ポリロタキサンは、1H-NMRおよびGPCで同定し、所望の構造を有するヒドロキシプロピル化ポリロタキサンであることを確認した。
上記で調製されたポリカプロラクトン修飾ポリロタキサンキシレン溶液をヘキサン中に滴下し、回収し、乾燥することにより、側鎖の末端としてOH基を有する側鎖修飾ポリロタキサンを得た。
このOH基導入側鎖修飾ポリロタキサンの物性は以下の通りであった。
側鎖の修飾度:0.5 (%で表示すると50%となる)。
側鎖の分子量:平均で約400。
ポリロタキサン重量平均分子量Mw(GPC):180,000。
上記製造例(4)で調製されたOH基導入側鎖修飾ポリロタキサンを用いた。OH基導入側鎖修飾ポリロタキサン10.0gをメチルエチルケトン50mlに溶解し、ジブチルヒドロキシトルエン(重合禁止剤)5mgを添加した後、2-アクリロイルオキシエチルイソシアネート1.85gを滴下した。触媒としてジラウリン酸ジブチルスズを10mg添加し、70℃で4時間攪拌し、ポリカプロラクトン末端にアクリレート基を導入したポリロタキサンのメチルエチルケトン溶液を得た。この溶液をヘキサン中に滴下し、析出した固体を回収し、乾燥することで、重合性基としてアクレート基が側鎖に導入されたポリロタキサンモノマー(T15)を得た。
側鎖の分子量:平均で約400。
ポリロタキサンモノマー重量平均分子量Mw(GPC):200,000。
アクリレート基 変性率:81モル%。
残存するOH基の割合:19モル%。
以下の方法に従い、ハードコート剤1を準備した。
ハードコート剤1の製造
γ-グリシドキシエチルトリメトキシシラン 13.86質量部、メチルトリエトキシシラン 11.16質量部、シリコーン系界面活性剤(東レ・ダウコーニング株式会社製L7001)0.059質量部、エチレングリコールイソプロピルエーテル 4.2質量部、アセチルアセトン 2.98質量部、t-ブチルアルコール 9.77質量部を加え、30分撹拌混合した。得られた溶液を撹拌しながら、0.05N塩酸水溶液 5.84質量部を液温が50℃を超えないように注意しながら加え、添加終了後、継続して1時間撹拌した。続いて、無機酸化物微粒子としてメタノール分散シリカゾル(日産化学株式会社製)46.69質量部を加え、30分間撹拌した。その後、硬化触媒としてトリス(2,4-ペンタンジオナト)アルミニウム(III) 0.54質量部を加え、撹拌混合した。次いで、エチレングリコールイソプロピルエーテル 1.4質量部、3-アミノプロピルトリメトキシシラン 0.14質量部を加え、室温で3時間撹拌混合した。得られた混合液をハードコート剤1とした。
フォトクロミック硬化体の作製・評価
(A)OXE-30 1質量部、(C1-1)A-200 4.5質量部、A-400 1.8質量部、4G 40.5質量部、14G 0.5質量部、(C1-2)BPE100 26.1質量部、A-BPE-10 0.5質量部、(C2-1)TMPT 9.3質量部、(その他単量体成分)αMS 7.2質量部、MSD 1.8質量部、からなる重合性単量体の混合物に、(B)フォトクロミック化合物PC1 0.04質量部、重合開始剤としてND 1質量部を添加し、十分に混合してフォトクロミック硬化性組成物を製造した。表1に各配合割合をまとめた。
上記方法で作製したフォトクロミック硬化体を50℃の20質量%水酸化ナトリウム水溶液に浸漬し、超音波洗浄器を用いて、5分間アルカリエッチングを行った。アルカリエッチング後、水道水、及び50℃の蒸留水で順次洗浄し、残余のアルカリ分を取り除いた後、室温になるまで約10分間放置した。このレンズ基材(フォトクロミック硬化体)に、前記方法で作製したハードコート剤1を25℃で引き上げ速度15cm/分の速さで、ディップコートした。この後、70℃のオーブンにて15分間予備硬化した後、110℃で3時間の硬化を行い、フォトクロミック硬化体の両面に、それぞれ2.1μmの厚みでハードコート層が形成された光学物品(ハードコートレンズ)を得た。得られたハードコートレンズの煮沸密着評価を行い、結果を表2に示した。
表1に示した配合割合のフォトクロミック硬化性組成物を準備した以外、実施例1と同様な方法でフォトクロミック硬化体を作製し、フォトクロミック特性及び保存安定性、耐久性の評価を行った。また、得られたフォトクロミック硬化体を用いてハードコートレンズを作成し、実施例1と同様に煮沸密着性試験を実施した。結果を表2に示した。
フォトクロミック積層体の作製・評価
(A)OXE-30 1質量部、(C1-1)14G 45質量部、(C1-2)A-PC 11質量部、(C2-1)TMPT 40質量部、(C2-3)T15 3質量部、(C3)TSL8370 6.5質量部、からなる重合性単量体の混合物に、(B)フォトクロミック化合物PC2 0.25質量部、PC3 1.4質量部、PC4 0.8質量部、PC5 0.15質量部、PC6 0.3質量部、安定剤としてHALS 3質量部、HP 1質量部、重合開始剤としてPI 0.3質量部、レベリング剤としてL7001 0.1質量部を添加し、十分に混合してフォトクロミック硬化性組成物を製造した。表3に各配合割合をまとめた。
表3に示した配合割合のフォトクロミック硬化性組成物を準備した以外、実施例2と同様な方法でフォトクロミック積層体を作製し、フォトクロミック特性及び保存安定性、耐久性の評価を行った。また、得られたフォトクロミック積層体を用いてハードコートレンズを作製し、実施例2と同様に煮沸密着性試験を実施した。結果を表4に示した。
フォトクロミック積層体の作製・評価
(A)OXE-30 1質量部、(C1-1)14G 25質量部、(C1-2)A-PC 10質量部、KT50 35質量部、(C2-1)TMPT 24質量部、(C2-4)S21 5質量部、(C3)TSL8370 6.5質量部、からなる重合性単量体の混合物に、(B)フォトクロミック化合物PC2 0.25質量部、PC3 1.4質量部、PC4 0.8質量部、PC5 0.15質量部、PC6 0.3質量部、安定剤としてHALS 3質量部、HP 3質量部、重合開始剤としてPI 0.25質量部、レベリング剤としてL7001 0.1質量部を添加し、十分に混合してフォトクロミック硬化性組成物を製造した。表5に各配合割合をまとめた。
表5に示した配合割合のフォトクロミック硬化性組成物を準備した以外、実施例3と同様な方法でフォトクロミック積層体を作製し、フォトクロミック特性および保存安定性、耐久性の評価を行った。また、得られたフォトクロミック積層体を用いてハードコートレンズを作製し、実施例2と同様に煮沸密着性試験を実施した。結果を表6に示した。
フォトクロミック硬化体の作製・評価
(A)OXE-30 1質量部、(C1-1)A-200 5質量部、4G 32質量部、(C1-2)KT50 5質量部、BPE100 49質量部、(C2-1)TMPT 8質量部、(その他単量体成分)αMS 9質量部、MSD 2質量部、からなる重合性単量体の混合物に、(B)フォトクロミック化合物PC7 0.04質量部、重合開始剤としてND 1質量部を添加し、十分に混合してフォトクロミック硬化性組成物を製造した。表7に各配合割合をまとめた。
表7に示した配合割合のフォトクロミック硬化性組成物を準備した以外、実施例4と同様な方法でフォトクロミック硬化体を作製し、フォトクロミック特性及び保存安定性、耐久性の評価を行った。また、得られたフォトクロミック積層体を用いてハードコートレンズを作製し、実施例4と同様に煮沸密着性試験を実施した。結果を表8に示した。
フォトクロミック積層体の作製・評価
(A)OXE-30 1質量部、(C1-1)14G 46.5質量部、(C1-2)A-PC 11.5質量部、(C2-1)TMPT 41質量部、からなる重合性単量体の混合物に、(B)フォトクロミック化合物PC7 0.5質量部、安定剤としてHALS 3質量部、HP 1質量部、重合開始剤としてPI 0.3質量部、レベリング剤としてL7001 0.1質量部を添加し、十分に混合してフォトクロミック硬化性組成物を製造した。表9に各配合割合をまとめた。
表9に示した配合割合のフォトクロミック硬化性組成物を準備した以外、実施例8と同様な方法でフォトクロミック積層体を作製し、フォトクロミック特性および保存安定性の評価を行った。また、得られたフォトクロミック積層体を用いてハードコートレンズを作製し、実施例2と同様に煮沸密着性試験を実施した。結果を表10に示した。
Claims (5)
- (A)一分子中に少なくとも一つのオキセタニル基を有するラジカル重合性単量体、
(B)フォトクロミック化合物、および
(C)上記(A)成分以外のラジカル重合性単量体
を含有してなることを特徴とするフォトクロミック硬化性組成物。 - 上記(C)成分が、
(C1)一分子中に2つの(メタ)アクリレート基を有する2官能(メタ)アクリレートモノマー、および
(C2)一分子中に3つ以上の(メタ)アクリレート基を有する多官能(メタ)アクリレートモノマー
を含む請求項1に記載のフォトクロミック硬化性組成物。 - 上記(C1)成分が、下記式(1)で示される(C1-1)成分を含み、および
上記(C2)成分が、下記式(2)で示される(C2-1)成分を含む請求項2に記載のフォトクロミック硬化性組成物。
(C1-1)成分:下記式(1)で示されるポリアルキレングリコールジ(メタ)アクリレートモノマー;
R1及びR2は、それぞれ、水素原子またはメチル基であり、
a及びbは、それぞれ、0以上の整数であり、かつ、a+bは2以上の整数である。)。
(C2-1)成分:下記式(2)で示される多官能(メタ)アクリレートモノマー;
R3は、水素原子、またはメチル基であり、
R4は、水素原子、または炭素数1~2のアルキル基であり、
R5は、炭素原子、炭素数1~10の3~6価の炭化水素基、または鎖中に酸素原子を含む炭素数1~10の3~6価の有機基であり、
cは、平均値で0~3の数であり、
dは、3~6の整数である。)。 - 請求項1に記載のフォトクロミック硬化性組成物を硬化させて得られる硬化体。
- 請求項4に記載の硬化体が光学基材上に積層されたフォトクロミック積層体。
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AU2019237636A1 (en) | 2020-10-15 |
CN111936524B (zh) | 2022-09-23 |
JPWO2019182085A1 (ja) | 2021-04-08 |
US20210002545A1 (en) | 2021-01-07 |
US11597874B2 (en) | 2023-03-07 |
CN111936524A (zh) | 2020-11-13 |
KR20200135353A (ko) | 2020-12-02 |
KR102583681B1 (ko) | 2023-10-04 |
EP3770182A4 (en) | 2021-12-29 |
JP7195304B2 (ja) | 2022-12-23 |
EP3770182A1 (en) | 2021-01-27 |
ES2935974T3 (es) | 2023-03-13 |
MX2020009706A (es) | 2020-10-07 |
EP3770182B1 (en) | 2022-12-07 |
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