JP2007079276A - Optical member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical member having a photochromic coating layer superior in scratch resistance and light resistance and superior in adhesion with an optical substrate. <P>SOLUTION: The optical member has the optical substrate, the photochromic coating layer applying and curing a curing composition being a compound having a silanol group or a compound having a group generating a silanol group by hydrolysis by an organic silicon compound including (1) radical polymerization monomer, (2) an organic silicon compound having an epoxy group on a one-sided terminal, (3) an amine compound, (4) photochromic compound and (5) a component of a photopolymerization initiator on the optical substrate and having the epoxy group on the one-sided terminal of (2), and a protection layer applying and curing a protection coating composition including a colloidal inorganic oxide having the organic silicon compound and photocatalyst action on the photochromic coating layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical member, and more particularly to an optical member having a photochromic coating layer having excellent adhesion to an optical substrate and having excellent scratch resistance and light resistance.

Photochromic is a reversible action that changes the color quickly in response to light containing ultraviolet rays, such as sunlight, to a certain compound, and returns to the original color (colorless state) when moved to a state without ultraviolet rays. Is used.
As a manufacturing method of this plastic spectacle lens having photochromic properties, a method of impregnating a lens surface having no photochromic property with a photochromic compound, a method of providing a primer layer having a photochromic property on the lens surface, a hard coating layer, or a monomer A method for directly obtaining a photochromic lens by dissolving a photochromic compound and polymerizing it is proposed, and in particular, the coating method can be applied to various existing plastic lenses.
Patent Document 1 proposes a method in which a photochromic compound dissolved in a radical polymerizable monomer is applied to a lens surface and cured with ultraviolet light. This radical polymerizable monomer uses a radical polymerizable monomer having a silanol group or a group that generates a silanol group by hydrolysis in order to obtain adhesion to the substrate. In order to obtain this, the pretreatment of the plastic lens before the photochromic layer treatment becomes complicated, and at the same time, it is difficult to obtain stable adhesion to the substrate.
Moreover, in order to ensure the adhesiveness between a base material and a photochromic layer, although the method of performing a primer process is also proposed, there exists a concern that a process will become complicated and film-forming time may require long time.
International Publication WO 03/011967

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an optical member having a photochromic coating layer having excellent scratch resistance and light resistance and excellent adhesion to an optical substrate.

  As a result of intensive studies to achieve the above object, the inventors of the present invention applied and cured on an optical substrate by using the compositions of the following components (1) to (5) and mixing ratios, and a photochromic coating layer: And the present invention has been completed by finding that the above object is achieved by forming a protective layer formed by coating and curing a specific protective coating composition on the photochromic coating layer.

That is, the present invention
An optical substrate, on the optical substrate,
(1) radical polymerizable monomer,
(2) an organosilicon compound having an epoxy group at one end;
(3) an amine compound,
(4) A photochromic compound and (5) a photopolymerization initiator component, and the organosilicon compound having an epoxy group at one end of (2) generates a silanol group or a silanol group by hydrolysis. A protective coating composition comprising an organic silicon compound and a colloidal inorganic oxide having a photocatalytic action on the photochromic coating layer, and a photochromic coating layer formed by applying and curing a curable composition which is a compound having a functional group An optical member having a protective layer formed by coating and curing is provided.

  The optical member of the present invention has a photochromic coating layer, and this coating layer is excellent in adhesion to the optical substrate. Furthermore, it is excellent in scratch resistance and light resistance by providing a protective layer formed by applying and curing a protective coating composition containing an organosilicon compound and a colloidal inorganic oxide having a photocatalytic action on the photochromic coating layer. .

Hereinafter, the present invention will be described in detail.
The optical member of the present invention includes an optical substrate, a photochromic coating layer formed by applying and curing a curable composition on the optical substrate, and a colloidal inorganic oxide having a photocatalytic action on the photochromic coating layer. A protective layer formed by applying and curing a protective coating composition containing the product.
The curable composition includes the following components (1) to (5).
(1) radical polymerizable monomer,
(2) an organosilicon compound having an epoxy group at one end;
(3) an amine compound,
(4) a photochromic compound, and (5) a photopolymerization initiator.

Hereinafter, each component will be described.
In the curable composition used in the present invention, the radically polymerizable monomer as component (1) is not particularly limited, and includes (meth) acryloyl group, (meth) acryloyloxy group, vinyl group, allyl group, styryl group, and the like. Any known compound having a radical polymerizable group can be used without any limitation. Among these, a compound having a (meth) acryloyl group or a (meth) acryloyloxy group as a radically polymerizable group is preferable because it is easily available and has good curability.
The (meth) acryloyl refers to both acryloyl and methacryloyl.
In order to improve the cured product properties such as solvent resistance, hardness and heat resistance after curing, or photochromic properties such as color density and fading speed, the radical polymerizable monomer may be an L scale of a homopolymer. Those having a Rockwell hardness of 60 or more (hereinafter sometimes referred to as high-hardness monomers) and those having a homopolymer L-scale Rockwell hardness of 40 or less (hereinafter sometimes referred to as low-hardness monomers) ) Is more preferable.
L scale Rockwell hardness means hardness measured according to JIS-B7726. By performing this measurement on the homopolymer of each monomer, it can be easily determined whether or not the hardness condition is satisfied. Specifically, a monomer is polymerized to obtain a cured body having a thickness of 2 mm, and this is easily maintained by measuring the L scale Rockwell hardness using a Rockwell hardness meter after holding it in a room at 25 ° C. for one day. Can be confirmed.

The polymer used for the measurement of the L scale Rockwell hardness is obtained by cast polymerization under a condition in which 90% or more of the polymerizable groups of the charged monomer are polymerized. The L scale Rockwell hardness of the cured body polymerized under such conditions is measured as a substantially constant value.
The high-hardness monomer has the effect of improving the solvent resistance, hardness, heat resistance and the like of the cured product after curing. In order to make these effects more effective, a radical polymerizable monomer having a homopolymer L-scale Rockwell hardness of 65 to 130 is preferable.
Such a high-hardness monomer is usually a compound having 2 to 15, preferably 2 to 6 radical polymerizable groups, and preferred specific examples are represented by the following general formulas (1) to (5). Compounds.

(式中、R¹³は水素原子またはメチル基であり、R¹⁴は水素原子、メチル基またはエチル基であり、R¹⁵は3〜6価の有機基であり、ｆは0〜3の整数、ｆ'はO〜3の整数、ｇは3〜6の整数である。)

Wherein R ¹³ is a hydrogen atom or a methyl group, R ¹⁴ is a hydrogen atom, a methyl group or an ethyl group, R ¹⁵ is a trivalent to hexavalent organic group, f is an integer of 0 to 3, f 'is an integer of O to 3, and g is an integer of 3 to 6.)

(式中、R¹⁶は水素原子またはメチル基であり、Ｂは3価の有機基であり、Ｄは2価の有機基であり、ｈは1〜10の整数である。)

(In the formula, R ¹⁶ is a hydrogen atom or a methyl group, B is a trivalent organic group, D is a divalent organic group, and h is an integer of 1 to 10.)

(式中、R¹⁷は水素原子またはメチル基であり、R¹⁸は水素原子、メチル基、エチル基またはヒドロキシル基であり、Ｅは環状の基を含む2価の有機基であり、ｉおよびｊは、ｉ＋ｊの平均値が0〜6となる正の整数である。)

(Wherein R ¹⁷ is a hydrogen atom or a methyl group, R ¹⁸ is a hydrogen atom, a methyl group, an ethyl group or a hydroxyl group, E is a divalent organic group containing a cyclic group, i and j Is a positive integer such that the average value of i + j is 0-6.)

(式中、R¹⁹は水素原子またはメチル基であり、Ｆは側鎖を有していてもよい主鎖炭素数2〜9のアルキレン基である。)

(In the formula, R ¹⁹ is a hydrogen atom or a methyl group, and F is an alkylene group having 2 to 9 main chain carbon atoms which may have a side chain.)

(式中、R²⁰は水素原子、メチル基またはエチル基であり、ｋは1〜6の整数である。)

(In the formula, R ²⁰ is a hydrogen atom, a methyl group or an ethyl group, and k is an integer of 1 to 6.)

In the general formulas (1) to (4), R ^{13 to} R ¹⁹ are all hydrogen atoms or methyl groups, and therefore the compounds represented by the general formulas (1) to (4) are 2 to 6 ( It is a compound having a (meth) acryloyloxy group.
R ¹⁴ in the general formula (1) is a hydrogen atom, a methyl group or an ethyl group.
R ¹⁵ in the general formula (1) is a trivalent to hexavalent organic group. The organic group is not particularly limited, and includes a bond other than a carbon-carbon bond such as an ester bond, an ether bond, an amide bond, a thioether bond, a sulfonyl bond, or a urethane bond in the main chain. Also good. In order for the L-scale Rockwell hardness of the homopolymer to be 60 or more, R ¹⁵ is preferably an organic group having 1 to 30 carbon atoms, more preferably an ether bond and / or a urethane bond. Good organic group having 1 to 15 carbon atoms.
F and f ′ are each independently an integer of 0 to 3. Moreover, in order to make L scale Rockwell hardness 60 or more, it is preferable that the sum total of f and f 'is 0-3.

  Specific examples of the high hardness monomer represented by the general formula (1) include trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, tetramethylolmethanetrimethacrylate, tetramethylolmethanetriacrylate, trimethylolbropantrimethacrylate, Tetramethylolmethane tetramethacrylate, tetramethylolmethane tetraacrylate, trimethylolpropane triethylene glycol trimethacrylate, trimethylolpropane triethylene glycol triacrylate, ethoxylated pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetramethacrylate, pentaerythritol trimethacrylate, Pentaerythritol tetramethacrylate, dipentae Sri hexaacrylate, urethane oligomer tetraacrylate, urethane oligomer hexa methacrylate, urethane oligomer hexaacrylate, polyester oligomer hexaacrylate, caprolactone-modified dipentaerythritol hexaacrylate, and ditrimethylolpropane tetraacrylate.

In the general formula (2), B is a trivalent organic group, and D is a divalent organic group. B and D are not particularly limited, and the main chain may contain bonds other than carbon-carbon bonds such as ester bonds, ether bonds, amide bonds, thioether bonds, sulfonyl bonds, and urethane bonds. Good. In order for the L-scale Rockwell hardness of the homopolymer to be 60 or more, B is preferably an organic group derived from a linear or branched hydrocarbon having 3 to 10 carbon atoms, and D is a carbon number. An organic group derived from a linear or branched aliphatic hydrocarbon having 1 to 10 carbon atoms or an aromatic hydrocarbon having 6 to 10 carbon atoms.
In order to make the L scale Rockwell hardness of the homopolymer 60 or more, h is an integer of 1 to 10, preferably an integer of 1 to 6.
Specific examples of the high hardness monomer represented by the general formula (2) include tetrafunctional polyester oligomers having a molecular weight of 2,500 to 3,500 (Daicel UCB, EB80, etc.), and tetrafunctional polyester oligomers having a molecular weight of 6,000 to 8,000 (Daicel UCB). Company, EB450, etc.), hexafunctional polyester oligomers having a molecular weight of 45,000 to 55,000 (Daicel UCB, EB1830, etc.), tetrafunctional polyester oligomers having a molecular weight of 10,000 (Daiichi Kogyo Seiyaku Co., Ltd., GX8488B, etc.) and the like.

R ¹⁸ in the general formula (3) is a hydrogen atom, a methyl group, an ethyl group or a hydroxyl group. E in the formula (3) is a divalent organic group containing a cyclic group. The organic group is not particularly limited as long as it contains a cyclic group, and in the main chain, carbon- such as ester bond, ether bond, amide bond, thioether bond, sulfonyl bond, urethane bond, etc. Bonds other than carbon bonds may be included. Examples of the cyclic group contained in E include a benzene ring, a cyclohexane ring, an adamantane ring, and the following cyclic groups.

(Ｇは、酸素原子、硫黄原子、−S(O₂)−、−C(O)−、−CH₂−、−CH=CH−、−C(CH₃)₂−および−C(CH₃)(C₆H₅)−から選ばれるいずれかの基であり、R²¹およびR²²は、それぞれ独立に炭素数1〜4のアルキル基またはハロゲン原子であり、ｌおよびｌ'は、それぞれ独立に0〜4の整数である。)
で示される基であるとより好ましく、最も好ましいＥは下記式、

で示される基である。 The cyclic group contained in E is preferably a benzene ring, and E is represented by the following formula:

(G is oxygen atom, sulfur atom, -S (O ₂ )-, -C (O)-, -CH _2- , -CH = CH-, -C (CH ₃ ) ₂ -and -C (CH ₃ ) (C ₆ H ₅ ) —, R ²¹ and R ²² are each independently an alkyl group having 1 to 4 carbon atoms or a halogen atom, and l and l ′ are each independently (It is an integer from 0 to 4.)
Is more preferable, and most preferable E is represented by the following formula:

It is group shown by these.

In the general formula (3), i and j are positive integers in which the average value of i + j is 0-6. The compound represented by the formula (3) is usually obtained as a mixture of a plurality of compounds having different i and j except when both i and j are 0. Since their isolation is difficult, i and j are expressed as the average value of i + j. The average value of i + j is more preferably 2-6.
Specific examples of the high hardness monomer represented by the general formula (3) include bisphenol A dimethacrylate, 2,2-bis (4-methacryloyloxyethoxyphenyl) propane, 2,2-bis (3,5-dibromo-4). -Methacryloyloxyethoxyphenyl) propane and the like.

In the general formula (4), R ¹⁹ is a hydrogen atom or a methyl group, and F is an alkylene group having 2 to 9 main chain carbon atoms which may have a side chain. Examples of the alkylene group having 2 to 9 carbon atoms in the main chain include an ethylene group, a propylene group, a trimethylene group, a butylene group, a neopentylene group, a hexylene group, and a nonylylene group.
Specific examples of the high hardness monomer represented by the general formula (4) include ethylene glycol diacrylate, ethylene glycol dimethacrylate, 1,4-butylene glycol dimethacrylate, 1,9-nonylene glycol dimethacrylate, and neopentylene glycol. Examples include dimethacrylate and neopentylene glycol diacrylate.

R ²⁰ in the general formula (5) is a hydrogen atom, a methyl group or an ethyl group, k is an integer of 2 to 6, and k is preferably 3 or 4.
Specific examples of the high hardness monomer represented by the general formula (5) include diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, tripropylene glycol dimethacrylate, and tetrapropylene glycol dimethacrylate.
Even in the compounds represented by the general formulas (1) to (5), depending on the combination of substituents, there are homopolymers having an L-scale Rockwell hardness of less than 60. Is classified into a low-hardness monomer or a medium-hardness monomer described later.
There are also high-hardness monomers not represented by the general formulas (1) to (5), and typical compounds include bisphenol A diglycidyl methacrylate, ethylene glycol bisglycidyl methacrylate, and glycidyl methacrylate.

(式中、R²³は水素原子またはメチル基であり、R²⁴およびR²⁵は、それぞれ独立に水素原子、メチル基またはエチル基であり、Ｚは酸素原子または硫黄原子であり、ｍはＲ²³が水素原子の場合は1〜70の整数であり、R²³がメチル基の場合は7〜70の整数でありそしてｍ'は0〜70の整数である。) The low-hardness monomer has an effect of making the cured body tough and improving the fading speed of the photochromic compound.
As such a low hardness monomer, the following general formula (6)

(Wherein R ²³ is a hydrogen atom or a methyl group, R ²⁴ and R ²⁵ are each independently a hydrogen atom, a methyl group or an ethyl group, Z is an oxygen atom or a sulfur atom, and m is R ^23. When R is a hydrogen atom, it is an integer of 1 to 70, and when R ²³ is a methyl group, it is an integer of 7 to 70, and m ′ is an integer of 0 to 70.)

(式中、R²⁶は水素原子またはメチル基であり、R²⁷およびR²⁸は、それぞれ独立に水素原子、メチル基、エチル基またはヒドロキシル基であり、Ｉは環状の基を含む2価の有機基であり、ｉ'およびｊ'は、ｉ'+ｊ'の平均値が8〜40となる整数である。)
で示される2官能モノマーや、下記一般式(8)、 Or the following general formula (7),

(Wherein R ²⁶ is a hydrogen atom or a methyl group, R ²⁷ and R ²⁸ are each independently a hydrogen atom, a methyl group, an ethyl group or a hydroxyl group, and I is a divalent organic compound containing a cyclic group. And i ′ and j ′ are integers having an average value of i ′ + j ′ of 8 to 40.)
A bifunctional monomer represented by the following general formula (8),

(式中、R²⁹は水素原子またはメチル基であり、R³⁰およびR³¹は、それぞれ独立に水素原子、メチル基またはエチル基であり、R³²は水素原子、炭素数1〜25のアルキル基、アルケニル基、アルコキシアルキル基またはハロアルキル基、炭素数6〜25のアリール基、あるいは炭素数2〜25の(メタ)アクリロイル基以外のアシル基であり、Ｚは酸素原子または硫黄原子であり、ｍ''はR²⁹が水素原子の場合は1〜70の整数であり、R²⁹がメチル基の場合は4〜70の整数であり、ｍ'''は0〜70の整数である。)

(In the formula, R ²⁹ is a hydrogen atom or a methyl group, R ³⁰ and R ³¹ are each independently a hydrogen atom, a methyl group or an ethyl group, and R ³² is a hydrogen atom, an alkyl group having 1 to 25 carbon atoms. , An alkenyl group, an alkoxyalkyl group or a haloalkyl group, an aryl group having 6 to 25 carbon atoms, or an acyl group other than a (meth) acryloyl group having 2 to 25 carbon atoms, Z is an oxygen atom or a sulfur atom, m '' Is an integer of 1 to 70 when R ²⁹ is a hydrogen atom, an integer of 4 to 70 when R ²⁹ is a methyl group, and m '''is an integer of 0 to 70.)

(式中、R³³は水素原子またはメチル基であり、R³⁴はR³³が水素原子の場合には炭素数1〜20のアルキル基であり、R³³がメチル基の場合には炭素数8〜40のアルキル基である。)
で示される単官能のモノマーが例示される。 Or the following general formula (9),

(In the formula, R ³³ is a hydrogen atom or a methyl group, R ³⁴ is an alkyl group having 1 to 20 carbon atoms when R ³³ is a hydrogen atom, and 8 carbon atoms when R ³³ is a methyl group. ˜40 alkyl groups.)
The monofunctional monomer shown by these is illustrated.

In the general formulas (6) to (9), R ²³ , R ²⁶ , R ²⁹ and R ³³ are a hydrogen atom or a methyl group. That is, the low-hardness monomer usually has 2 or less (meth) acryloyloxy groups or (meth) acryloylthio groups as polymerizable groups.
In the general formula (6), R ²⁴ and R ²⁵ are each independently a hydrogen atom, a methyl group or an ethyl group, and Z is an oxygen atom or a sulfur atom.
In the general formula (6), when R ²³ is a hydrogen atom, that is, when it has an acryloyloxy group or an acryloylthio group as a polymerizable group, m is an integer of 1 to 70, while R ²³ is methyl. When it is a group, that is, when it has a methacryloyloxy group or a methacryloylthio group as a polymerizable group, m is an integer of 7 to 70. M ′ is an integer of 0 to 70.
Specific examples of the low hardness monomer represented by the general formula (6) include alkylene glycol di (meth) acrylates such as trialkylene glycol diacrylate, tetraalkylene glycol diacrylate, nonyl alkylene glycol diacrylate, and nonyl alkylene glycol dimethacrylate. Kind.

R ²⁶ in the general formula (7) is a hydrogen atom, a methyl group or an ethyl group.
I is a divalent organic group containing a cyclic group. This I is the same as that exemplified as E which is a cyclic group included in the formula (3). I ′ and j ′ in the formula (7) are integers having an average value of i ′ + j ′ of 8 to 40, preferably 9 to 30. These i ′ and j ′ are also usually expressed as average values for the same reason as i and j in the above-mentioned formula (3).
Specific examples of the low hardness monomer represented by the general formula (7) include 2,2-bis (4-acryloyloxypolyethylene glycol phenyl) propane having an average molecular weight of 776.

In the general formula (8), R ²⁹ is a hydrogen atom or a methyl group, and R ³⁰ and R ³¹ are each independently a hydrogen atom, a methyl group, or an ethyl group. R ³² is a hydrogen atom, an alkyl group having 1 to 25 carbon atoms, an alkenyl group, an alkoxyalkyl group or a haloalkyl group, an aryl group having 6 to 25 carbon atoms, or an acyl group other than an acryloyl group having 2 to 25 carbon atoms.
Examples of the alkyl group or alkenyl group having 1 to 25 carbon atoms include a methyl group, an ethyl group, a propyl group, and a nonyl group. These alkyl groups or alkenyl groups may be linear or branched, and may be further substituted with a substituent such as a halogen atom, a hydroxyl group, an aryl group, or an epoxy group.
Examples of the alkoxyalkyl group having 1 to 25 carbon atoms include a methoxybutyl group, an ethoxybutyl group, a butoxybutyl group, and a methoxynonyl group.
Examples of the aryl group having 6 to 25 carbon atoms include a phenyl group, a toluyl group, an anthranyl group, and an octylphenyl group. Examples of the acyl group other than the (meth) acryloyl group include an acetyl group, a propionyl group, a butyryl group, a valeryl group, and an oleyl group.
M ″ in the general formula (8) is an integer of 1 to 70 when R ²⁹ is a hydrogen atom, that is, when an acryloyloxy group or an acryloylthio group is a polymerizable group, and R ²⁹ is a methyl group In this case, that is, when having a methacryloyloxy group or a methacryloylthio group as a polymerizable group, m ″ is an integer of 4 to 70, and m ′ ″ is an integer of 0 to 70.

  Specific examples of the low hardness monomer represented by the general formula (8) include polyethylene glycol methacrylate having an average molecular weight of 526, polyethylene glycol methacrylate having an average molecular weight of 360, methyl ether polyethylene glycol methacrylate having an average molecular weight of 475, and an average molecular weight of 1,000. Methyl ether polyethylene glycol methacrylate, polypropylene glycol methacrylate with an average molecular weight of 375, polypropylene methacrylate with an average molecular weight of 430, polypropylene methacrylate with an average molecular weight of 622, methyl ether polypropylene glycol methacrylate with an average molecular star of 620, polytetra-polymer with an average molecular weight of 566 Methylene glycol methacrylate, octyl phenyl ether polyethylene glycol methacrylate with an average molecular weight of 2,034, nonyl with an average molecular weight of 610 And polyalkylene glycol (meth) acrylate such as methyl ether polyethylene thioglycol methacrylate having an average molecular weight of 640 and perfluorohebutyl ethylene glycol methacrylate having an average molecular weight of 498.

In the general formula (9), R ³³ is a hydrogen atom or a methyl group, and when R ³³ is a hydrogen atom, R ³⁴ is an alkyl group having 1 to 20 carbon atoms, and when R ³³ is a methyl group. R ³⁴ is an alkyl group having 8 to 40 carbon atoms. These alkyl groups may be linear or branched and may be substituted with a substituent such as a halogen atom, a hydroxyl group, an alkoxyl group, an acyl group, or an epoxy group.
Specific examples of the low hardness monomer represented by the general formula (9) include stearyl methacrylate, lauryl methacrylate, ethylhexyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, lauryl acrylate, and the like.
Among these low-hardness monomers represented by the formulas (6) to (9), methyl ether polyethylene glycol methacrylate having an average molecular weight of 475, methyl ether polyethylene glycol methacrylate having an average molecular weight of 1,000, trialkylene glycol diacrylate, tetraalkylene glycol Particularly preferred are diacrylate, nonylalkylene glycol diacrylate, methyl acrylate, ethyl acrylate, butyl acrylate and lauryl acrylate.
Even in the compounds represented by the above formulas (6) to (9), depending on the combination of the substituents, there are those in which the L-scale Rockwell hardness of the homopolymer is 40 or more. The high hardness monomer or the medium hardness monomer described later.

    Examples of the monomer that is neither a high-hardness monomer nor a low-hardness monomer, that is, a monomer having an L scale Rockwell hardness of more than 40 and less than 60 (sometimes referred to as a medium hardness monomer), for example, having an average molecular weight of 650 Polytetramethylene glycol dimethacrylate, polytetramethylene glycol dimethacrylate having an average molecular weight of 1,400, bifunctional (meth) acrylates such as bis (2-methacryloyloxyethylthioethyl) sulfide; diallyl phthalate, diallyl isophthalate, diallyl tartrate Polyallyl compounds such as epoxy succinate diallyl, diallyl fumarate, diallyl chlorendate, diallyl hexaphthalate, allyl diglycol carbonate; 1,2-bis (methacryloylthio) ethane, bis (2-acryloylthioethyl) ether, 1,4 -Polyvalent thioacrylic acid and polyvalent thiomethacrylic acid ester compounds such as bis (methacryloylthiomethyl) benzene; unsaturated carboxylic acids such as acrylic acid, methacrylic acid, and maleic anhydride; methyl methacrylate, butyl methacrylate, methacrylic acid Acrylic acid and methacrylic acid ester compounds such as benzyl, phenyl methacrylate, 2-hydroxyethyl methacrylate, biphenyl methacrylate; fumaric acid ester compounds such as diethyl fumarate and diphenyl fumarate; methylthioacrylate, benzylthioacrylate, benzylthiomethacrylate, etc. Thioacrylic acid and thiomethacrylic acid ester compounds; styrene, chlorostyrene, methylstyrene, vinylnaphthalene, α-methylstyrene dimer, bromostyrene, divinylben Vinyl compounds such as pyrrole, vinyl pyrrolidone; (meth) acrylate with hydrocarbon chain having unsaturated bond in the molecule such as oleyl methacrylate, nerol methacrylate, geraniol methacrylate, linalool methacrylate, farnesol methacrylate, etc. And radical polymerizable monofunctional monomers.

  These medium hardness monomers can also be used, and the high hardness monomer, the low hardness monomer and the medium hardness monomer can be appropriately mixed and used. In order to improve the balance of the cured product properties such as solvent resistance, hardness, heat resistance, etc. of the cured product of the curable composition, or photochromic properties such as color density and fading speed, The low-hardness monomer is preferably 5 to 70% by weight, and the high-hardness monomer is preferably 5 to 95% by weight. Furthermore, it is particularly preferable that a monomer having three or more radical polymerizable groups is blended in at least 5% by weight or more of other radical polymerizable monomers as the high hardness monomer to be blended.

In the radical polymerizable monomer in the present invention, a radical polymerizable monomer having at least one epoxy group and at least one radical polymerizable group in the molecule, in addition to the monomers classified by hardness as described above. It is preferable that a body (hereinafter sometimes simply referred to as an epoxy monomer) is further blended. Depending on the structure of this epoxy monomer, there are some which show L scale lock hardness of a single cured product of 60 or more, and others which show 40 or less. When classified according to the hardness of the homopolymer, it is classified into one of a high hardness monomer, a low hardness monomer, and a medium hardness monomer according to the hardness.
By using this epoxy monomer as a component of the radical polymerizable monomer in the present invention, the durability of the photochromic compound can be further improved, and the adhesion of the photochromic coating layer is further improved.
A known compound can be used as such an epoxy monomer, but a compound having a (meth) acryloyloxy group as a radical polymerizable group is preferred.
Such an epoxy monomer is usually represented by the following formula (10).

｛式中、R³⁵およびR³⁸は、それぞれ独立に水素原子またはメチル基であり、R³⁶およびR³⁷は、それぞれ独立に炭素数1〜4のアルキレン基、または、下記式

(Ｇ'は、酸素原子、硫黄原子、−S(O₂)−、−C(O)−、−CH₂−、−CH=CH−、−C(CH₃)₂−および−C(CH₃)(C₆H₅)−から選ばれるいずれかの基であり、R³⁹およびR⁴⁰は、それぞれ独立に炭素数1〜4のアルキル基またはハロゲン原子であり、ｌ''およびｌ'''は、それぞれ独立に0〜4の整数である。)で示される基である。｝

{In the formula, R ³⁵ and R ³⁸ are each independently a hydrogen atom or a methyl group; R ³⁶ and R ³⁷ are each independently an alkylene group having 1 to 4 carbon atoms;

(G ′ is oxygen atom, sulfur atom, —S (O ₂ ) —, —C (O) —, —CH ₂ —, —CH═CH—, —C (CH ₃ ) ₂ — and —C (CH ₃ ) any group selected from (C ₆ H ₅ ) —, R ³⁹ and R ⁴⁰ are each independently an alkyl group having 1 to 4 carbon atoms or a halogen atom, and l ″ and l ″. 'Is each independently an integer of 0 to 4). }

で表される基の場合、Ｇ'は、酸素原子、硫黄原子、−S(O₂)−、−C(O)−、−CH₂−、−CH=CH−、−C(CH₃) ₂−および−C(CH₃)(C₆H₅)−から選ばれるいずれかの基であり、R³⁹およびR⁴⁰は、それぞれ独立に、メチル基、エチル基、プロピル基、ブチル基等の炭素数1〜4のアルキル基または塩素原子、臭素原子等のハロゲン原子であり、ｌ''およびｌ'''は、それぞれ独立に0〜4の整数である。上記式で表される基としては、下記式

で示される基であることが最も好ましい。 Examples of the alkylene group having 1 to 4 carbon atoms represented by R ³⁶ and R ³⁷ include a methylene group, an ethylene group, a propylene group, a trimethylene group, and a butylene difference. These alkylene groups may be substituted with a hydroxyl group, a halogen atom or the like.
R ³⁶ and / or R ³⁷ is represented by the following formula:

In the case of the group represented by the formula, G ′ represents an oxygen atom, a sulfur atom, —S (O ₂ ) —, —C (O) —, —CH ₂ —, —CH═CH—, —C (CH ₃ ). ₂ and any group selected from -C (CH ₃ ) (C ₆ H ₅ )-, R ³⁹ and R ⁴⁰ are each independently a methyl group, an ethyl group, a propyl group, a butyl group or the like. An alkyl group having 1 to 4 carbon atoms or a halogen atom such as a chlorine atom or a bromine atom, and l ″ and l ′ ″ are each independently an integer of 0 to 4; As the group represented by the above formula,

Most preferably, it is group shown by these.

Specific examples of the epoxy monomer represented by the general formula (10) include glycidyl acrylate, glycidyl methacrylate, β-methyl glycidyl methacrylate, bisphenol A-monoglycidyl ether-methacrylate, 4-glycidyloxy methacrylate, 3- (glycidyl-2 -Oxyethoxy) -2-hydroxypropyl methacrylate, 3- (glycidyloxy-1-isopropyloxy) -2-hydroxypropyl acrylate, 3-glycidyloxy-2-hydroxypropyloxy) -2-hydroxypropyl acrylate, average molecular weight 540 And glycidyloxypolyethylene glycol methacrylate. Among these, glycidyl acrylate, glycidyl methacrylate and glycidyloxypolyethylene glycol methacrylate having an average molecular weight of 40 are particularly preferable.
The blending ratio of these epoxy monomers is usually 0.01 to 30% by weight and preferably 0.1 to 20% by weight in the radical polymerizable monomer.

In the curable composition used in the present invention, an organic silicon compound having an epoxy group at one end of the component (2) is blended, whereby the stable adhesion to the substrate of the photochromic coating layer coated and cured with the curable composition. Can be granted.
The organosilicon compound of component (2) is a compound having a silanol group, or a compound having a group that generates a silanol group by hydrolysis, such as an organosilicon compound represented by the following general formula (I) or a compound thereof A hydrolyzate is mentioned.
(R ⁸¹ ) _a (R ⁸³ ) _b Si (OR ⁸² ) _{4- (a + b)} (I)
(In the formula, R ⁸¹ is an organic group having an epoxy group, R ⁸² is an alkyl group having 1 to 4 carbon atoms, an acyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms, and R ⁸³ is 1 carbon atom. -6 alkyl group or C6-C10 aryl group, a is an integer of 1 and b is an integer of 0 or 1.)

Examples of the organic group having an epoxy group of R ⁸¹ include, for example, an epoxy group, a glycidoxy group (α-glycidoxy group, β-glycidoxy group, γ-glycidoxy group, δ-glycidoxy group, etc.), 3,4-epoxycyclohexyl group. Etc.
Examples of the alkyl group having 1 to 4 carbon atoms of R ⁸² include a linear or branched methyl group, ethyl group, propyl group, and butyl group.
Examples of the acyl group having 1 to 4 carbon atoms of R ⁸² include an acetyl group, a propionyl group, an oleyl group, and a benzoyl group.
Examples of the aryl group having 6 to 10 carbon atoms of R ⁸² include a phenyl group, a xylyl group, and a tolyl group.
Examples of the alkyl group having 1 to 4 carbon atoms of R ⁸³ include a linear or branched methyl group, ethyl group, propyl group, butyl group, pentyl group, and hexyl group.
Examples of the aryl group having 6 to 10 carbon atoms of R ⁸³ include a phenyl group, a xylyl group, and a tolyl group.

Specific examples of the compound represented by the general formula (I) include glycidoxymethyltriethoxysilane, α-glycidoxyethyltriethoxysilane, β-glycidoxyethyltrimethoxysilane, β-glycidoxy Ethyltriethoxysilane, α-glycidoxypropyltrimethoxysilane, α-glycidoxypropyltriethoxysilane, β-glycidoxypropyltrimethoxysilane, β-glycidoxypropyltriethoxysilane, γ-glycidoxy Propyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltripropoxysilane, γ-glycidoxypropyltributoxysilane, γ-glycidoxypropyltriphenoxysilane, α-glycidoxy Butyltrimethoxysilane, α-glycidoxybuty Lutriethoxysilane, β-glycidoxybutyltrimethoxysilane, β-glycidoxybutyltriethoxysilane, γ-glycidoxybutyltrimethoxysilane, γ-glycidoxybutyltriethoxysilane, δ-glycidoxybutyl Trimethoxysilane, δ-glycidoxybutyltriethoxysilane, (3,4-epoxycyclohexyl) methyltrimethoxysilane, (3,4-epoxycyclohexyl) methyltriethoxysilane, β- (3,4-epoxycyclohexyl) Ethyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltripropoxysilane, β- (3,4-epoxycyclohexyl) ethyltributoxysilane, β- (3,4-epoxy Cyclohexyl) ethyltriphenoxysilane, γ- (3,4-epoxycyclohexyl) propyltrimethoxysilane, γ- (3,4-epoxycyclohexyl) propyltriethoxysilane, δ- (3,4-epoxycyclohexyl) butyltrimethoxy Silane, δ- (3,4-epoxycyclohexyl) butyltriethoxysilane, glycidoxymethylmethyldimethoxysilane, glycidoxymethylmethyldiethoxysilane, α-glycidoxyethylmethyldimethoxysilane, α-glycidoxyethyl Methyldiethoxysilane, β-glycidoxyethylmethyldimethoxysilane, β-glycidoxyethylmethyldiethoxysilane, α-glycidoxypropylmethyldimethoxysilane, α-glycidoxypropylmethyldiethoxysilane, β-glucan Lysidoxypropylmethyldimethoxysilane, β-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylmethyldipropoxysilane, γ-glycidoxypropylmethyldibutoxysilane, γ-glycidoxypropylmethyldiphenoxysilane, γ-glycidoxypropylethyldimethoxysilane, γ-glycidoxypropylethyldiethoxysilane, γ-glycidoxypropylvinyl Examples include dimethoxysilane, γ-glycidoxypropylvinyldiethoxysilane, γ-glycidoxypropylphenyldimethoxysilane, γ-glycidoxypropylphenyldiethoxysilane, and γ-glycidoxypropyltrimethoxy. Run, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltripropoxysilane, γ-glycidoxypropyltributoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylethyl Dimethoxysilane and γ-glycidoxypropylethyldiethoxysilane are preferred.
As a compounding quantity with respect to the curable composition whole quantity of the organosilicon compound of a component (2), it is 1.0-15 weight part normally with respect to 100 weight part of radically polymerizable monomers, and it is 3.0-10 weight part. preferable.

An amine compound is mix | blended with the curable composition used by this invention as a component (3). By mix | blending an amine compound, when the said curable composition is used as a coating material, the adhesiveness of the photochromic film layer and optical substrate which consist of a hardening body of the said curable composition can be improved greatly.
As the amine compound of component (3) used in the present invention, any known amine compound can be used without any limitation as long as it is a basic compound that functions as a condensation or addition catalyst for the radical polymerizable monomer.

(上記基中、R⁰¹は水素原子およびアルキル基であり、R⁰²、R⁰³、R⁰⁴およびR⁰⁵は、それぞれ同一もしくは異なるアルキル基である)
で表されるアミノ基のみをアミノ基として有するヒンダードアミン化合物が挙げられる。 Examples of amine compounds that do not exhibit the functions required as amine compounds in the present invention include the following groups:

(In the above groups, R ⁰¹ is a hydrogen atom and an alkyl group, and R ⁰² , R ⁰³ , R ⁰⁴ and R ⁰⁵ are the same or different alkyl groups, respectively)
The hindered amine compound which has only the amino group represented by these as an amino group is mentioned.

Specific examples of amine compounds that can be used in the present invention include non-polymerizable low molecular weight amine compounds such as triethanolamine, N-methyldiethanolamine, triisopropanolamine, 4,4-dimethylaminobenzophenone, diazapicyclooctane, N, N-dimethylaminoethyl methacrylate, amine compounds having a polymerizable group such as N, N-diethylaminoethyl methacrylate, n- (hydroxyethyl) -N-methylaminopropyltrimethoxysilane, dimethoxyphenyl-2-pi Examples thereof include amine compounds having a silyl group such as peridinoethoxysilane, N, N-diethylaminomethyltrimethylsilane, and (N, N-diethyl-3-aminopropyl) trimethoxysilane.
Among these amino compounds, from the viewpoint of improving adhesion, those having a hydroxyl group, those having a (meth) acryloyloxy group as a radical polymerizable group, or amine compounds having a group capable of generating a silanol group by hydrolysis are included. preferable.

｛式中、R⁰⁶は水素原子あるいは炭素数1〜4の直鎖状のアルキル基であり、R⁰⁷は水酸基、(メタ)アクリロイルオキシ基または加水分解によりシラノール基を生成可能な基であり、R⁰⁸は水素原子、炭素数1〜6のアルキル基、水酸基、(メタ)アクリロイルオキシ基または加水分解によりシラノール基を生成可能な基であり、Ａ'は炭素数2〜6のアルキレン基、Ａ''はR⁰⁸が水素原子またはアルキル基の場合には炭素数1〜6のアルキレン基、R⁰⁸が水酸基、(メタ)アクリロイルオキシ基または加水分解によりシラノール基を生成可能な基である場合には炭素数2〜6のアルキレン基を示す。｝
で示されるアミン化合物が、塩基性が強く、密着性向上効果の高いアミン化合物としてより好適である。 For example, the following general formula (11)

{Wherein R ⁰⁶ is a hydrogen atom or a linear alkyl group having 1 to 4 carbon atoms, R ⁰⁷ is a hydroxyl group, a (meth) acryloyloxy group or a group capable of generating a silanol group by hydrolysis, R ⁰⁸ is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a hydroxyl group, a (meth) acryloyloxy group, or a group capable of generating a silanol group by hydrolysis, A ′ is an alkylene group having 2 to 6 carbon atoms, A '' ^Means that when R ⁰⁸ is a hydrogen atom or an alkyl group, it is an alkylene group having 1 to 6 carbon atoms, R ⁰⁸ is a hydroxyl group, a (meth) acryloyloxy group or a group capable of generating a silanol group by hydrolysis. Represents an alkylene group having 2 to 6 carbon atoms. }
Is more suitable as an amine compound having a strong basicity and a high effect of improving adhesion.

In R ⁰⁷ and R ⁰⁸ in the general formula (11), the group capable of generating a silanol group by hydrolysis has the same definition as the group defined in the organosilicon compound.
These amine compounds can be used singly or in combination, and the compounding amount of the component (3) amine compound is 0.01 to 20 parts by weight with respect to 100 parts by weight of the radical polymerizable monomer, It is preferable that it is 0.1-10 weight part.

As the photochromic compound of the component (4) used in the curable composition used in the present invention, known compounds can be used, and examples thereof include photochromic compounds such as fulgimide compound, spirooxazine compound, chromene compound, In the present invention, these photochromic compounds can be used without particular limitation.
Examples of the fulgimide compound, spirooxazine compound and chromene compound are described in, for example, JP-A-2-28154, JP-A-62-288830, WO94 / 22850, WO96 / 14596, etc. Can be preferably used.
Examples of compounds having excellent photochromic properties include, for example, JP 2001-114775 A, JP 2001-031670 A, JP 2001-011067 A, JP 2001-011066 A, JP 2000-347346 A. JP, 2000-34476, 2000-3044761, 2000-327676, 2000-327675, 2000-256347, 2000-229976 JP, 2000-229975, JP 2000-229974, JP 2000-229973, JP 2000-229972, JP 2000-219687, JP 2000-219686, JP 2000-219685, JP 11-322739, JP 11-286484, JP 11-279171, JP 10-298176, JP 09-218301, JP 09 The compounds disclosed in JP-A No. -124645, JP-A No. 08-295690, JP-A No. 08-176139, JP-A No. 08-157467 and the like can also be suitably used.

  Among these photochromic compounds, chromene-based photochromic compounds are particularly suitable because they have higher photochromic property durability than other photochromic compounds, and the improvement in color density and fading speed of photochromic properties is particularly large compared to other photochromic compounds. Can be used for Furthermore, among these chromene-based photochromic compounds, compounds having a molecular weight of 540 or more can be suitably used because the improvement in the color density and the fading speed of the photochromic properties according to the present invention is particularly large compared to other chromene-based photochromic compounds. .

Further, as a chromene compound having particularly good various photochromic properties such as color density, fading speed, durability and the like, those represented by the following general formula (12) are preferable.

で示される基は、置換もしくは非置換の芳香族炭化水素基、または置換もしくは非置換の不飽和複素環基であり、
R⁴³、R⁴⁴およびR⁴⁵は、それぞれ独立に、水素原子、アルキル基、アルコキシル基、アラルコキシ基、アミノ基、置換アミノ基、シアノ基、置換もしくは非置換のアリール基、ハロゲン原子、アラルキル基、ヒドロキシル基、置換もしくは非置換のアルキニル基、窒素原子をヘテロ原子として有し該窒素原子とピラン環もしくは前記式(13)で示される基の環とが結合する置換もしくは非置換の複素環基、または該複素原基に芳香族炭化水素環もしくは芳香族複素環が縮合した縮合複素環基であり、ｏは0〜6の整数であり、 {In the formula, the following general formula (13)

The group represented by is a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted unsaturated heterocyclic group,
R ⁴³ , R ⁴⁴ and R ⁴⁵ each independently represent a hydrogen atom, an alkyl group, an alkoxyl group, an aralkoxy group, an amino group, a substituted amino group, a cyano group, a substituted or unsubstituted aryl group, a halogen atom, an aralkyl group, A hydroxyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted heterocyclic group having a nitrogen atom as a heteroatom and bonded to the pyran ring or the ring of the group represented by the formula (13), Or a condensed heterocyclic group obtained by condensing an aromatic hydrocarbon ring or an aromatic heterocyclic ring to the heteroprime group, and o is an integer of 0 to 6,

(式中、R⁴⁶は、置換もしくは非置換のアリール基、または置換もしくは非置換のヘテロアリール基であり、R⁴⁷は、水素原子、アルキル基、またはハロゲン原子であり、ｐは1〜3の整数である。)で示される基、下記一般式(15)、

(式中、R⁴⁸は、置換もしくは非置換のアリール基、または置換もしくは非置換のヘテロアリール基であり、ｐ'は1〜3の整数である。)で示される基、置換もしくは非置換のアリール基、置換もしくは非置換のヘテロアリール基、またはアルキル基であるか、あるいはR⁴¹とR⁴²とが一緒になって、脂肪族炭化水素環もしくは芳香族炭化水素環を構成していてもよい。]
なお、前記一般式(14)、(15)、前記R⁴¹およびR⁴²にて説明した置換アリール基および置換ヘテロアリール基における慣換基としては、前記R⁴³〜R⁴⁴と同様の基が挙げられる。 R ⁴¹ and R ⁴² each independently represent the following general formula (14),

(Wherein R ⁴⁶ is a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group, R ⁴⁷ is a hydrogen atom, an alkyl group, or a halogen atom, and p is 1 to 3) A group represented by the following general formula (15),

Wherein R ⁴⁸ is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, and p ′ is an integer of 1 to 3, a substituted or unsubstituted group An aryl group, a substituted or unsubstituted heteroaryl group, or an alkyl group, or R ⁴¹ and R ⁴² may be combined to form an aliphatic hydrocarbon ring or an aromatic hydrocarbon ring. . ]
The conventional groups in the substituted aryl group and substituted heteroaryl group described in the general formulas (14), (15), R ⁴¹ and R ⁴² include the same groups as in R ^{43 to} R ^44. It is done.

（式中、R⁴⁹およびR⁵⁰は、それぞれ前記一般式(12)のR⁴¹およびR⁴²と同様であり、R⁵¹、R⁵²は、それぞれ前記式(12)のR⁴⁵と同様であり、ｑおよびｑ'は、それぞれ1〜2の整数である。) Among the chromene compounds represented by the general formula (12), the compounds represented by the following general formulas (16) to (21) are particularly preferable from the viewpoint of photochromic properties such as color density and fading speed and durability. .

(In the formula, R ⁴⁹ and R ⁵⁰ are the same as R ⁴¹ and R ^{42 in} the general formula (12), respectively, R ⁵¹ and R ⁵² are the same as R ^{45 in the} formula (12), respectively. q and q ′ are each an integer of 1 to 2.)

｛式中のR⁵³およびR⁵⁴は、それぞれ前記一般式(12)のR⁴¹およびR⁴²と同様であり、R⁵⁵およびR⁵⁶は、それぞれ前記式(12)のR⁴⁵と同様であり、Ｌは下記式、

(上記式中、Ｐは、酸素原子または硫黄原子であり、R⁵⁷は、炭素数1〜6のアルキレン基であり、ｓ、ｓ'およびs''は、いずれも1〜4の整数である。)で示されるいずれかの基であり、ｒおよびｒ'は、それぞれ独立に1または2である。｝

{In the formula, R ⁵³ and R ⁵⁴ are the same as R ⁴¹ and R ^{42 in} the general formula (12), respectively, and R ⁵⁵ and R ⁵⁶ are the same as R ^{45 in the} formula (12), respectively. L is the following formula:

(In the above formula, P is an oxygen atom or a sulfur atom, R ⁵⁷ is an alkylene group having 1 to 6 carbon atoms, and s, s ′ and s ″ are all integers of 1 to 4. .), And r and r ′ are each independently 1 or 2. }

(式中、R⁵⁸およびR⁵⁹は、それぞれ前記式(12)のR⁴¹およびR⁴²と同様であり、R⁶⁰、R⁶¹およびR⁶²は、それぞれ前記式(12)のR⁴⁵と同様であり、ｖは1または2である。)

(In the formula, R ⁵⁸ and R ⁵⁹ are the same as R ⁴¹ and R ^{42 in} the formula (12), respectively, and R ⁶⁰ , R ⁶¹ and R ⁶² are the same as R ^{45 in the} formula (12), respectively. And v is 1 or 2.)

(式中、R⁶³およびR⁶⁴は、それぞれ前記式(12)のR⁴¹およびR⁴²と同様であり、R⁶⁵およびR⁶⁶は、それぞれ前記式(12)のR⁴⁵と同様であり、ｗおよびｗ'は、それぞれ独立に1または2である。)

(Wherein R ⁶³ and R ⁶⁴ are the same as R ⁴¹ and R ^{42 in the} formula (12), respectively, R ⁶⁵ and R ⁶⁶ are the same as R ^{45 in the} formula (12), and w And w ′ are each independently 1 or 2.)

(式中、R⁶⁷およびR⁶⁸は、それぞれ前記式(12)のR⁴¹およびR⁴²と同様であり、R⁶⁹ 、R⁷⁰ 、R⁷¹およびR⁷²は、それぞれ前記式(12)のR⁴⁵と同様であり、ｘおよびｘ'は、それぞれ独立に1または2である。)

(In the formula, R ⁶⁷ and R ⁶⁸ are the same as R ⁴¹ and R ^{42 in} the formula (12), respectively, and R ⁶⁹ , R ⁷⁰ , R ⁷¹ and R ⁷² are R ^{45 in the} formula (12), respectively. And x and x ′ are each independently 1 or 2.)

(式中、R⁷³およびR⁷⁴は、それぞれ前記式(12)のR⁴¹およびR⁴²と同様であり、R⁷⁵ 、R⁷⁶ およびR⁷⁷は、それぞれ前記式(12)のR⁴⁵と同様であり、

は、少なくとも1つの置換基を有してもよい脂肪族炭化水素環であり、ｙ、ｙ'およびy''は、それぞれ独立に1または2である。]

(In the formula, R ⁷³ and R ⁷⁴ are the same as R ⁴¹ and R ^{42 in} the formula (12), respectively, and R ⁷⁵ , R ⁷⁶ and R ⁷⁷ are the same as R ^{45 in the} formula (12), respectively. Yes,

Is an aliphatic hydrocarbon ring which may have at least one substituent, and y, y ′ and y ″ are each independently 1 or 2. ]

Among the chromene compounds represented by the general formulas (16) to (21), chromene compounds having the following structures are particularly preferable.

  These photochromic compounds can be used by appropriately mixing a plurality of types in order to develop an appropriate color tone. As the blending amount of the photochromic compound of component (4) with respect to the total amount of the curable composition, radical polymerization can be used. The amount is usually 0.01 to 20 parts by weight, preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the functional monomer.

The curable composition used in the present invention contains a photopolymerization initiator as component (5). The photopolymerization initiator used in the present invention is not particularly limited. For example, benzoin, benzoin methyl ether, benzoin butyl ether, benzophenol, acetophenone, 4,4′-dichlorobenzophenone, diethoxyacetophenone, 2-hydroxy-2- Methyl-1-phenylpropan-1-one, benzylmethyl ketal, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-isopropylthiooxane Bis (2,6-dimethoxybenzoyl-2,4,4-trimethyl-pentylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenyl -Phosphine oxide, 2-benzyl-2-dimethyl Ylamino-1- (4-morpholinophenyl) -butanone-1 and the like, such as 1-hydroxycyclohexyl phenyl ketone, 2-isopropylthiooxane, bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl -Pentylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenyl-phosphine oxide are preferred.
These photopolymerization initiators can be used by appropriately mixing a plurality of types. The amount of the photopolymerization initiator of component (5) relative to the total amount of the curable composition is a radical polymerizable monomer. The amount is usually 0.01 to 5 parts by weight and preferably 0.1 to 1 part by weight with respect to 100 parts by weight.

When the curable composition used in the present invention is cured by a method other than photopolymerization, for example, as a thermal polymerization initiator, benzoyl peroxide, p-chlorobenzoyl peroxide, decanoyl peroxide, lauroyl peroxide Diacyl peroxides such as acetyl peroxide; peroxyesters such as t-butylperoxy-2-ethylhexanoate, t-butylperoxydicarbonate, cumylperoxyneodecanate, t-butylperoxybenzoate; Percarbonates such as diisopropyl peroxydicarbonate, di-2-ethylhexyl peroxydicarbonate, di-sec-butyloxycarbonate; 2,2′-azobisisoptyronitrile, 2,2′-azobis (4-dimethyl) Valeronitrile), 2,2'-azobis (2- And azo compounds such as 1,1′-azobis (cyclohexane-1-carbonitrile).
The amount of the thermal polymerization initiator used varies depending on the polymerization conditions, the type of initiator, the type and composition of the polymerizable monomer, but is usually 0.01 to 10 parts by weight with respect to 100 parts by weight of the total polymerizable monomer. It is suitable to use in the range. The above thermal polymerization initiators may be used alone or in combination.

Further, the curable composition used in the present invention further includes a surfactant, an antioxidant, and a radical scavenging agent for improving the durability of the photochromic compound, improving the color development speed, improving the fading speed and improving the moldability. Additives such as additives, ultraviolet stabilizers, ultraviolet absorbers, mold release agents, anti-coloring agents, antistatic agents, fluorescent dyes, dyes, pigments, fragrances, and plasticizers may be added. As these additives, known compounds are used without any limitation.
As the surfactant, any of a nonionic surfactant, an anionic surfactant, and a cationic surfactant can be used, but a nonionic surfactant is preferably used because of its solubility in a polymerizable monomer. Specific examples of nonionic surfactants that can be suitably used include sorbitan fatty acid ester, glycerin fatty acid ester, decaglycerin fatty acid ester, propylene glycol / pentaerythritol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester , Polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene phytosterol / phytostanol, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene castor oil / cured Castor oil, polyoxyethylene lanolin, lanolin alcohol, beeswax derivative, poly Alkoxy polyoxyethylene alkyl amine fatty acid amides, polyoxyethylene alkylphenyl formaldehyde condensates, can be mentioned a single-chain polyoxyethylene alkyl ethers. In using the surfactant, two or more kinds may be mixed and used. The addition amount of the surfactant is preferably in the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the polymerizable monomer.

Antioxidants, radical scavengers, UV stabilizers, UV absorbers include hindered amine light stabilizers, hindered phenol antioxidants, phenol radical scavengers, sulfur antioxidants, benzotriazole compounds, benzophenones A system compound etc. can be used conveniently. These antioxidants, radical scavengers, UV stabilizers, and UV absorbers may be used in combination of two or more. Furthermore, when using these non-polymerizable compounds, surfactants and antioxidants, radical scavengers, UV stabilizers, and UV absorbers may be used in combination. The addition amount of these antioxidants, radical scavengers, UV stabilizers and UV absorbers is preferably in the range of 0.001 to 20 parts by weight with respect to 100 parts by weight of the total polymerizable monomer.
Among the stabilizers, when the curable composition is applied and used, as a particularly useful stabilizer, prevention of deterioration of the photochromic compound when the curable composition is cured, or durability of the cured product From the viewpoint of improvement, a hindered amine light stabilizer is mentioned. As the hindered amine light stabilizer, a known compound can be used without any limitation as long as it is a compound defined as a hindered amine compound described as a compound excluded from the above-described amine compound. Among them, when used for coating, as a compound that expresses the effect of preventing deterioration of the photochromic compound, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, Asahi Denka Kogyo Co., Ltd. Examples include ADK STAB LA-52, LA-62, LA-77, LA-82 and the like. The amount of addition may be in the range of 0.001 to 20 parts by weight with respect to 100 parts by weight of the total polymerizable monomer, but when applied and used, the range of 0.1 to 10 parts by weight is preferable. Preferably, it may be used in the range of 1 to 10 parts by weight.

  Further, in the curable composition used in the present invention, it is preferable to contain a surfactant, a leveling agent, etc., in order to improve uniformity during film formation, and in particular, a silicone-based / fluorine-based leveling having leveling properties. It is preferable to add an agent. The addition amount is not particularly limited, but is usually 0.01 to 1.0% by weight, preferably 0.05 to 0.5% by weight, based on the total amount of the curable composition.

The preparation method of the curable composition used by this invention is not specifically limited, It can carry out by weighing and mixing a predetermined amount of each component. The order of addition of each component is not particularly limited, and all components may be added at the same time, or only the monomer component is mixed in advance, and a photochromic compound or other additive may be added and mixed immediately before polymerization. Good.
The viscosity at 25 ° C. of the curable composition used in the present invention is preferably 20 to 500 cp, more preferably 50 to 300 cp, and particularly preferably 60 to 200 cp.
By setting the viscosity within this range, it becomes easy to adjust the thickness of a photochromic coating layer, which will be described later, to be as thick as 10 to 100 μm, and it is possible to sufficiently exhibit photochromic characteristics.

The optical member of the present invention has a photochromic coating layer formed by coating and curing the above-described curable composition on an optical substrate.
Examples of the optical substrate used in the optical member of the present invention include a synthetic resin substrate, for example, a copolymer of methyl methacrylate and one or more other monomers, a copolymer of diethylene glycol bisallyl carbonate and one or more other monomers. Examples include, but are not limited to, polymers, polycarbonate, polystyrene, polyvinyl chloride, unsaturated polyester, polyethylene terephthalate, polyurethane, polythiourethane, sulfide resins utilizing ene-thiol reaction, and vinyl polymers containing sulfur. It is not a thing.
The optical substrate used for the optical member of the present invention is preferably a plastic lens substrate, and more preferably a plastic lens substrate for glasses.

As a method for applying the curable composition onto an optical substrate, for example, a dipping method, a spin method, a spray method, etc. are applied as usual methods. The method is preferred.
Further, before applying the curable composition onto the optical substrate, by performing chemical treatment with acid, alkali, various organic solvents, physical treatment with plasma, ultraviolet rays, ozone, etc., and detergent treatment using various detergents. Adhesion between the optical substrate and the photochromic coating layer can be improved.

The method for obtaining the photochromic coating layer by curing the curable composition is not particularly limited, and a known polymerization method according to the type of the radical polymerizable monomer to be used can be employed. The polymerization initiation means can be carried out by heat, irradiation with ultraviolet rays, α rays, β rays, γ rays or the like, or a combination of both. Preferably, ultraviolet rays are irradiated and cured, followed by further heat curing. preferable.
As the light source used for curing by the ultraviolet ray, a known light source can be used without any limitation. Specific examples include an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a xenon lamp, a carbon arc, a germicidal lamp, an electrodeless lamp, and the like. Can be mentioned.
The light irradiation time can be appropriately determined depending on the type of ultraviolet polymerization initiator, the absorption wavelength, the sensitivity, the desired film thickness of the photochromic coating layer, and the like.
In the present invention, the film thickness of the photochromic coating layer is preferably 10 μm to 100 μm, and more preferably 20 μm to 50 μm, in consideration of the concentration during color development, durability and heat resistance, and film uniformity.

In the optical member of the present invention, a protective layer is formed on the photochromic coating layer.
As a material for this protective layer, a coating composition containing a known organosilicon compound and a colloidal inorganic oxide having a photocatalytic action is used.
Examples of the organosilicon compound include an organosilicon compound represented by (II) or a hydrolyzate thereof.
(R ⁹¹ ) _{a '} (R ⁹³ ) _b' Si (OR ⁹² ) _{4- (a '+ b')} (II)
(In the formula, R ⁹¹ is an organic group having a glycidoxy group, an epoxy group, a vinyl group, a methacryloxy group, an acryloxy group, a mercapto group, an amino group, a phenyl group, etc., and R ⁹² is an alkyl having 1 to 4 carbon atoms. Group, an acyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms, R ⁹³ is an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 10 carbon atoms, and a ′ and b ′ are each 0 or Indicates an integer of 1.)

Examples of the alkyl group having 1 to 4 carbon atoms of R ⁹² include a linear or branched methyl group, ethyl group, propyl group, and butyl group.
Examples of the acyl group having 1 to 4 carbon atoms of R ⁹² include an acetyl group, a propionyl group, an oleyl group, and a benzoyl group.
Examples of the aryl group having 6 to 10 carbon atoms of R ⁹² include a phenyl group, a xylyl group, and a tolyl group.
Examples of the alkyl group having 1 to 4 carbon atoms of R ⁹³ include a linear or branched methyl group, ethyl group, propyl group, butyl group, pentyl group, and hexyl group.
Examples of the aryl group having 6 to 10 carbon atoms of R ⁹³ include a phenyl group, a xylyl group, and a tolyl group.

  Specific examples of the compound represented by the general formula (II) include methyl silicate, ethyl silicate, n-propyl silicate, i-propyl silicate, n-butyl silicate, sec-butyl silicate, t-butyl silicate tetraacetoxy. Silane, methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, methyltriacetoxysilane, methyltributoxysilane, methyltripropoxysilane, methyltriamyloxysilane, methyltriphenoxysilane, methyltribenzyloxysilane, methyl Triphenethyloxysilane, glycidoxymethyltrimethoxysilane, glycidoxymethyltriethoxysilane, α-glycidoxyethyltriethoxysilane, β-glycidoxyethyltrimethoxysilane, β- Lysidoxyethyltriethoxysilane, α-glycidoxypropyltrimethoxysilane, α-glycidoxypropyltriethoxysilane, β-glycidoxypropyltrimethoxysilane, β-glycidoxypropyltriethoxysilane, γ-glycine Sidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltripropoxysilane, γ-glycidoxypropyltributoxysilane, γ-glycidoxypropyltriphenoxysilane, α-glycyl Sidoxybutyltrimethoxysilane, α-glycidoxybutyltriethoxysilane, β-glycidoxybutyltrimethoxysilane, β-glycidoxybutyltriethoxysilane, γ-glycidoxybutyltrimethoxysilane, γ-glyci Doxybutyl triet Xysilane, δ-glycidoxybutyltrimethoxysilane, δ-glycidoxybutyltriethoxysilane, (3,4-epoxycyclohexyl) methyltrimethoxysilane, (3,4-epoxycyclohexyl) methyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltripropoxysilane, β- (3,4, Epoxycyclohexyl) ethyltributoxysilane, β- (3,4-epoxycyclohexyl) ethyltriphenoxysilane, γ- (3,4-epoxycyclohexyl) propyltrimethoxysilane, γ- (3,4-epoxycyclohexyl) propyltri Ethoxysilane, -(3,4-epoxycyclohexyl) butyltrimethoxysilane, δ- (3,4-epoxycyclohexyl) butyltriethoxysilane, glycidoxymethylmethyldimethoxysilane, glycidoxymethylmethyldiethoxysilane, α-glycid Xylethylmethyldimethoxysilane, α-glycidoxyethylmethyldiethoxysilane, β-glycidoxyethylmethyldimethoxysilane, β-glycidoxyethylmethyldiethoxysilane, α-glycidoxypropylmethyldimethoxysilane, α- Glycidoxypropylmethyldiethoxysilane, β-glycidoxypropylmethyldimethoxysilane, β-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, γ-glycidoxypropylmethyldiethoxy Silane, γ-glycidoxypropylmethyldipropoxysilane, γ-glycidoxypropylmethyldibutoxysilane, γ-glycidoxypropylmethyldiphenoxysilane, γ-glycidoxypropylethyldimethoxysilane, γ-glycidoxy Propylethyldiethoxysilane, γ-glycidoxypropylvinyldimethoxysilane, γ-glycidoxypropylvinyldiethoxysilane, γ-glycidoxypropylphenyldimethoxysilane, γ-glycidoxypropylphenyldiethoxysilane, ethyltri Methoxysilane, ethyltriethoxysilane, vinyltrimethoxysilane, vinyltriacetoxysilane, vinyltrimethoxyethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, phenyltriacetoxysilane , Γ-chloropropyltrimethoxysilane, γ-chloropropyltriethoxysilane, γ-chloropropyltriacetoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-mercapto Propyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, β-cyanoethyltriethoxysilane, chloromethyltrimethoxysilane, chloromethyltriethoxysilane, N- (β-aminoethyl) γ-aminopropyltrimethoxysilane, N- (Β-aminoethyl) γ-aminopropylmethyldimethoxysilane, γ-aminopropylmethyldimethoxysilane, N- (β-aminoethyl) γ-aminopropyltriethoxysilane, N- (β-aminoethyl) γ-aminopropyl Tildiethoxysilane, dimethyldimethoxysilane, phenylmethyldimethoxysilane, dimethyldiethoxysilane, phenylmethyldiethoxysilane, γ-chloropropylmethyldimethoxysilane, γ-chloropropylmethyldiethoxysilane, dimethyldiacetoxysilane, γ-methacrylic Oxypropylmethyldimethoxysilane, γ-methacryloxypropylmethyldiethoxysilane, γ-mercaptopropylmethyldimethoxysilane, γ-mercaptopropylmethyldiethoxysilane, methylvinyldimethoxysilane, methylvinyldiethoxysilane, γ-methacryloxypropyltri And methoxysilane.

Examples of the colloidal inorganic oxide having a photocatalytic action include titanium oxide, zinc oxide, cerium oxide, niobium oxide, and complex oxides thereof, and these can be used alone or in combination of two or more.
The content of the inorganic oxide in the protective layer is preferably 2 to 50% by weight and more preferably 2 to 20% by weight based on the weight of the protective layer. The thickness of the protective layer is preferably 2 to 15 μm, more preferably 3 to 10 μm.
Moreover, a well-known additive, for example, a curing catalyst, surfactant, a solvent, etc. can be added to a protective coating composition as needed.
By providing this protective layer, it is possible to provide an optical member having good chromic resistance and light resistance and having photochromic performance.
As a method for applying the protective coating composition onto the photochromic coating layer, for example, a dipping method, a spin method, a spray method, etc. are applied as usual methods. A coating method is preferred.
Before applying the protective coating composition onto the photochromic coating layer, chemical treatment with acid, alkali, various organic solvents, physical treatment with plasma, ultraviolet rays, ozone, etc., and detergent treatment with various detergents are performed. Can improve the adhesion between the photochromic coating layer and the protective layer.

In the present invention, it is also possible to form an antireflection film on the protective layer. The material and formation method of the antireflection film are not particularly limited, and a single layer or a multilayer film made of a known inorganic oxide can be used.
Examples of the inorganic oxide include silicon dioxide (SiO ₂ ), zirconium oxide (ZrO ₂ ), aluminum oxide (Al ₂ O ₃ ), niobium oxide (Nb ₂ O ₅ ), yttrium oxide (Y ₂ O ₃ ), and the like. Is mentioned.

EXAMPLES Hereinafter, although this invention is demonstrated more concretely using an Example, this invention is not limited to these Examples. Various physical properties were measured by the following methods.
The optical members in the examples and comparative examples were measured for various physical properties by the following test methods.
(1) Film thickness Single-sided reflection spectroscopy was measured using a reflected light measuring device USPM-RU manufactured by Olympus, and the calculated ripple was calculated using the following equation.
d = (P-1) / {2 * 1000 * n (1 / [lambda] 1-1 / [lambda] 2)}
d: Film thickness P: Number of peaks in the calculated wavelength range n: Refractive index of the cured film λ1: Short wavelength value in the calculated wavelength range (nm)
λ2: Long wavelength value in the calculated wavelength range (nm)
(2) Scratch resistance test The surface of the plastic lens was rubbed against the plastic surface at 1 kgf / cm ² with steel wool (standard # 0000, manufactured by Nippon Steel Wool Co., Ltd.) to determine the difficulty of scratching. The judgment criteria were as follows.
A. B. Hardly scratches even when rubbed strongly. If scratched strongly, it will be considerably scratched. (3) Adhesion test Cross-cut 100 stitches at 1mm intervals, adhesive tape (trade name; Cellotape, Nichiban Co., Ltd.) is strongly applied, and then peeled off rapidly. I investigated. Those that did not peel at all were indicated as 100/100, and those that did not peel at all were indicated as 0/100.
(4) Yellowing degree Transmittance spectroscopy was measured using a spectrophotometer (instant multi-photometry system MCPD-3000) manufactured by Otsuka Electronics Co., Ltd., and tristimulus values X, Y in standard light C from the data. Z was obtained, and the YI value was calculated by the following formula.
YI = 100 (1.28X-1.06Z) / Y
The yellowing degree (ΔYI) was calculated from the following formula using the YI values before and after the 48-hour light resistance test with a xenon long weather meter (WEL-25AX-HC-BEC) manufactured by Suga Test Instruments Co., Ltd.
ΔYI = YI after light resistance test−YI before light resistance test
A smaller value of ΔYI indicates less yellowing.

Example 1
(I) Preparation of photochromic coating solution 20 parts by weight of trimethylolpropane trimethacrylate, 35 parts by weight of BPE oligomer (2,2-bis (4-methacryloyloxypolyethoxyphenyl) propane), EB6A (polyester oligomer hexaacrylate) in a plastic container ) 10 parts by weight, 10 parts by weight of polyethylene glycol diacrylate having an average molecular weight of 532, 100 parts by weight of radical polymerizable monomer consisting of 10 parts by weight of glycidyl methacrylate, 3 parts by weight of chromene 1 as a photochromic dye, and as an antioxidant LS765 (bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, methyl (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate) 5 parts by weight, UV polymerization started CGI-184 (1-hydroxycyclohexyl phenyl ketone) and CGI403 (bis (2 , 6-dimethoxybenzoyl-2,4,4-trimethylpentylphosphine oxide) was added to 0.1 parts by weight, and the mixture was sufficiently stirred and mixed, and γ-glycidoxypropyl as an organosilicon compound having an epoxy group was added. 6.4 parts by weight of trimethoxysilane was added dropwise with stirring, and after stirring sufficiently, 1.4 parts by weight of N-methyldiethanolamine was weighed dropwise and further thoroughly mixed with stirring. Polyoxyalkylene / dimethylpolysiloxane copolymer (manufactured by Nihon Unicar Co., Ltd.) is added and mixed, and then defoamed for 2 minutes using a rotation and revolution type stirring deaerator (AR-250 manufactured by Shinky Co., Ltd.). Thus, a curable composition having photochromic properties was obtained.

クロメン1

Chrome 1

(Ii) Formation of photochromic coating layer Polythiourethane (trade name: EYAS, center wall thickness: 2.0 mm, manufactured by HOYA Co., Ltd.) as a plastic lens substrate is immersed in a 10% sodium hydroxide aqueous solution at 60 ° C for 5 minutes. Then, after sufficiently washing with pure water and drying, coating on the convex surface side of the substrate was performed by spin coating using the curable composition prepared in (i). This treated lens is irradiated with 1800 mJ / cm ² (100 mW / cm ² , 3 minutes) with a UV light with a wavelength of 405 nm in a nitrogen atmosphere (oxygen concentration of 500 ppm or less), and further 110 Curing was carried out at 60 ° C. for 60 minutes to obtain a plastic lens lens having a photochromic coating layer.
(iii) Preparation of protective coating solution Add 100 parts by weight of titanium oxide sol (solid content 30% by weight) as inorganic oxide colloidal particles having photocatalytic action to a glass container equipped with a magnetic stirrer, and then add 100 parts by weight of methanol and organic 120 parts by weight of γ-glycidoxypropyltrimethoxysilane as a silicon compound was added dropwise with stirring, and the mixture was stirred for 1 hour. Thereafter, 29.1 parts by weight of 0.01 mol / L hydrochloric acid was added and stirred for 50 hours. Then, 5.8 parts by weight of 0.1 mol / L sodium hydroxide was added and stirred for 1 hour. Thereafter, 77 parts by weight of propylene glycol monomethyl ether, 14 parts by weight of diacetone alcohol and 0.3 part by weight of a silicone surfactant were added as a solvent and stirred for 2 hours. Thereafter, 4.6 parts by weight of aluminum trisacetylacetonate was sequentially added and stirred for 90 hours. A solution obtained by filtering the resulting solution through a 0.5 μm filter was used as a protective coating solution.
(iv) Formation of protective layer The plastic lens lens having the photochromic coating layer obtained in the above (ii) was immersed in a 10 wt% sodium hydroxide aqueous solution at 60 ° C for 300 seconds, and then under application of ultrasonic waves of 28 kHz, Washed for 300 seconds with ion-exchanged water. Finally, a series of steps for drying in a 70 ° C. atmosphere was used as lens pretreatment. The protective layer was formed by immersing the pretreated lens in the coating composition by dipping for 30 seconds and heating and curing the lens pulled at a lifting speed of 30 cm / min for 60 minutes at 110 ° C. The film thickness was 4 μm. Table 1 shows the results of evaluating the above (1) to (4) for the obtained plastic lens having the protective layer.

Example 2
A plastic lens having a protective layer was obtained in the same manner as in Example 1 (iv) except that the pulling rate by the dipping method was changed to 20 cm / min. The film thickness was 2 μm. Table 1 shows the results of evaluating the above-mentioned lenses (1) to (4).

Example 3
A plastic lens having a protective layer was obtained in the same manner as in Example 1 (iv) except that the pulling speed by the dipping method was changed to 40 cm / min. The film thickness was 6 μm. Table 1 shows the results of evaluating the above-mentioned lenses (1) to (4).

Example 4
In Example 1 (iii), a protective layer was formed in the same manner except that rutile type titanium oxide sol (solid content 30% by weight) was used instead of titanium oxide sol (solid content 30% by weight) as the inorganic oxide colloidal particles. A plastic lens having was obtained. Table 1 shows the results of evaluating the above-mentioned lenses (1) to (4).

Example 5
The same procedure as in Example 1 (iii) was conducted except that 33 parts by weight of 120 parts by weight of γ-glycidoxypropyltrimethoxysilane was changed to 33 parts by weight of γ-methacryloxypropyltrimethoxysilane as the organosilicon compound. Thus, a plastic lens having a protective layer was obtained. Table 1 shows the results of evaluating the above-mentioned lenses (1) to (4).

Example 6
A plastic lens having a protective layer was obtained in the same manner as in Example 1 (iv) except that the dipping method was changed to the spin coating method. The protective layer was formed on each side of the protective layer, and the film thickness was 5 μm. Table 1 shows the results of evaluating the above-mentioned lenses (1) to (4).

Comparative Example 1
In Example 1 (iii), protection was similarly performed except that colloidal silica sol having no photocatalytic action (solid content 30% by weight) was used instead of titanium oxide sol (solid content 30% by weight) as the inorganic oxide colloidal particles. A plastic lens with a layer was obtained. Table 1 shows the results of evaluating the above-mentioned lenses (1) to (4). The obtained plastic lens did not have sufficient light resistance of the photochromic coating layer.

Comparative Example 2
In Example 1 (iii), a protective layer is provided in the same manner except that zirconium oxide sol (solid content 30% by weight) is used instead of titanium oxide sol (solid content 30% by weight) as the inorganic oxide colloidal particles. A plastic lens was obtained. Table 1 shows the results of evaluating the above-mentioned lenses (1) to (4). The obtained plastic lens did not have sufficient light resistance of the photochromic coating layer.

Comparative Example 3
A plastic lens having a protective layer was obtained in the same manner except that a urethane acrylate UV curable hard coat agent composed of tolylene diisocyanate and 1-hydroxyethyl acrylate was used instead of the protective coating solution in Example (iii). It was. Table 1 shows the results of evaluating the above-mentioned lenses (1) to (4). The obtained plastic lens did not have sufficient light resistance of the photochromic coating layer and had low scratch resistance.

The optical member of the present invention has a photochromic coating layer, the coating layer has excellent adhesion to the optical substrate, and further contains an organic silicon compound and a colloidal inorganic oxide having a photocatalytic action on the photochromic coating layer. By providing a protective layer formed by applying and curing a protective coating composition, the film is excellent in scratch resistance and light resistance.

Claims (7)

An optical substrate, on the optical substrate,
(1) radical polymerizable monomer,
(2) an organosilicon compound having an epoxy group at one end;
(3) an amine compound,
(4) A photochromic compound and (5) a photopolymerization initiator component, and the organosilicon compound having an epoxy group at one end of (2) generates a silanol group or a silanol group by hydrolysis. A photochromic coating layer formed by applying and curing a curable composition that is a compound having a group to be
An optical member comprising a protective layer formed by applying and curing a protective coating composition containing an organosilicon compound and a colloidal inorganic oxide having a photocatalytic action on the photochromic coating layer. The curable composition is
(1) For 100 parts by weight of radical polymerizable monomer,
(2) 1.0 to 15 parts by weight of an organosilicon compound having an epoxy group at one end;
(3) 0.01-20 parts by weight of an amine compound,
The optical member according to claim 1, comprising: (4) 0.01 to 20 parts by weight of a photochromic compound, and (5) 0.01 to 5 parts by weight of a photopolymerization initiator.   The optical member according to claim 1 or 2, wherein the inorganic oxide is at least one selected from titanium oxide, zinc oxide, cerium oxide, niobium oxide, and composite oxides thereof.   The optical member according to claim 1, wherein the amount of the inorganic oxide contained in the protective layer is 2 to 50% by weight based on the weight of the protective layer.   The optical member according to claim 1, wherein an antireflection film is formed on the protective layer.   The optical member according to claim 1, wherein the protective layer has a thickness of 3 to 10 μm. The optical member according to claim 1, wherein the optical substrate is a plastic lens base material.