COMPOSITION OF OPTICAL MATERIAL AND OPTICAL MATERIAL

Abstract

The present invention is an optical material composition containing (A) 100 parts by mass of a polymerizable monomer, and (B) 0.001 to 0.3 parts by mass of a UV-absorbing material having a maximum absorption wavelength of 360 nm or more and less than 380 nm and having a specific structure, and an optical material formed from the composition. According to the present invention, an optical material composition containing a UV-absorbing material and having good long-term storage stability, and an optical material formed from the composition, can be provided; in particular, an optical material composition capable of forming a plastic lens with a high blue light cutoff rate.

Description

COMPOSITION OF OPTICAL MATERIAL AND OPTICAL MATERIAL FIELD OF INVENTION The present invention relates to an optical material composition containing UV absorbing material having good long-term storage stability and an optical material formed therefrom, in particular to an optical material composition capable of forming plastic lenses having a high blue light cut-off rate. BACKGROUND OF THE INVENTION Until now, the negative effects on the eyes from UV exposure have been considered a problem. Recently, it has also been reported that, with regard to eye health, light in the blue range (380 to 500 nm) (from now on also referred to as blue light) can cause retinal damage due to its high energy. Damage from blue light is called blue light, and to prevent this, it is said to be especially desirable to reduce blue light, which has a relatively short wavelength of approximately 380 to 420 nm. To solve the problem, for example, PTL 1 proposes a lens having a multilayer film formed on a convex surface of a plastic member, in which the multilayer film has an average reflectance in a wavelength range 400 to 500 nm of 2 to 10%. Rcn; nn / Lznz / E / YiAi Ref. 316729 However, the measured blue light cutting rate of the lens was approximately 30%. PTLs 2 and 3 describe a polymerizable lens composition containing a benzotriazole-based UV-absorbing material and having an increased light cutoff rate, but this focuses on absorption at about 405 nm or below and does not address the full scope of the blue light cutoff rate. PTLs 4 and 5 propose a polymerizable lens composition containing a UV-absorbing material 2-(2-hydroxy-3-t-butyl-5-methylphenyl)-chlorobenzotriazole and having an increased blue light cut-off ratio, but the UV-absorbing material has a low solubility in the monomer and therefore its long-term storage stability is poor. Reference List Patent Literature PTL 1: JP 2012-093689 A PTL 2: JP 2008-056854 A PTL 3: JP 2010-84006 A PTL 4: JP 5620033 PTL 5: JP 6294386 BRIEF DESCRIPTION OF THE INVENTION Technical Problem Accordingly, an object of the present invention is to provide an optical material composition having good long-term storage stability and an optical material formed therefrom, especially an optical material composition capable of forming plastic lenses having a high blue light cut-off rate. Solution to the Problem The present inventors have diligently studied for the purpose of achieving the above-mentioned object and, as a result, have found that, by using a UV absorbing material having a maximum absorption wavelength of 360 nm or more and less than 380 nm and containing a benzotriazole compound having a specific structure, the above-mentioned object can be achieved, and have completed the present invention. Specifically, the present invention is: [1] An optical material composition containing (A) 100 parts by mass of a polymerizable monomer, and (B) 0.001 to 0.3 parts by mass of a UV absorbing material having a maximum absorption wavelength of 360 nm or more and less than 380 nm and is represented by the following formula (1) : rcíw nn / Lznz / E / YiAi HO wherein R1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a hydroxy group, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, a linear or branched di-substituted amino group having 1 to 4 carbon atoms, a nitro group, a carboxy group, an alkyloxycarbonyl group in which the alkyl group has 1 to 8 carbon atoms, in which the hydroxyalkyl group has 1 to 8 carbon atoms, an alkylcarbonyloxyalkyl group in which the alkyl groups each have 1 to 8 carbon atoms, a carboxyalkyl group in which the alkyl group has 1 to 3 carbon atoms, an alkyloxycarbonylalkyl group in which the total of the carbon atoms of the alkyl groups is 2 to 10, an aryl group, an acyl group, a sulfo group or a cyano group;R2 represents a hydroxy group, an alkoxy group having 1 to 8 carbon atoms, an alkylthio group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, or a linear or branched disubstituted amino group having 1 to 4 carbon atoms; R3 represents a hydrogen atom, a hydroxy group, an alkyl group, or an alkoxy group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, or a linear or branched disubstituted amino group having 1 to 4 carbon atoms; and R2 and R3 can be crosslinked to form a cyclic rcíw nn / Lznz / E / YiAi structure.; The present invention may include the following embodiments. [2] The optical material composition according to the above [1], wherein the polymerizable monomer (A) contains at least one polyisocyanate compound selected from bis(isocyanatomethyl)bicyclo[2.2.1]heptane, xylylene diisocyanate, 4,4'-methylenebisphenyl bisisocyanate, 2,4'-methylenebisphenyl bisisocyanate and methyl-1,3-phenylene diisocyanate, and at least one polythiol compound selected from pentaerythritol tetrakis(3-mercaptopropionate) and 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane. [3] The optical material composition according to the above [1], wherein the polymerizable monomer (A) contains bis(2,3-epithiopropyl) disulfide, and a mixture consisting mainly of 5,7-dimercaptomethyl-l,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-l,11-dimercapto-3,6,9-trithiaundecane and 4,8-dimercaptomethyl-l,11-dimercapto-3,6,9-trithiaundecane. [4] An optical material formed from a cured product produced by polymerizing and curing the optical material composition of any of the above [1] to [3], which has a light transmittance at a wavelength of 400 nm of 5% or less, a light transmittance at a wavelength of 420 nm of 70% or less, and a light cut-off rate in a wavelength range of 380 to 500 nm of 35% or more. [5] A plastic lens formed from the optical material of the above [4] . In the present invention, the maximum absorption wavelength of each compound is measured in a solvent that has no influence on the measurement. An example of such a solvent is chloroform. Advantageous effects of the invention By polymerizing and curing the optical material composition of the present invention, an optical material with a high blue light cutoff ratio can be obtained, especially a plastic lens formed from the optical material. Furthermore, since the composition has good storage stability, its utility value is high. DETAILED DESCRIPTION OF THE INVENTION The optical material composition of the present invention is an optical material composition containing: (A) 100 parts by mass of a polymerizable monomer, and (B) 0.001 to 0.3 parts by mass of a UV absorbing material having a maximum absorption wavelength of 360 nm or more and less than 380 nm and having a specific structure. The components are described below. Component (A): polymerizable monomer In the present invention, known polymerizable monomers can be used. The polymerizable monomers favorably used in the composition of optical material are known addition polymerizable monomers (hereinafter this may be simply referred to as component (Al)), cationic polymerizable monomers (hereinafter this may be simply referred to as component (A2)) and radical polymerizable monomers (hereinafter this may be simply referred to as component (A3)). (Al) Addition polymerizable monomers Without specific limitation, any of the addition polymerizable monomers are usable in the present invention, and examples thereof are monomers that can be raw materials for providing resins such as a polyurethane resin, a polythiourethane resin, a polyurea resin, a polyurethane-polyurea resin, and a polythiourethane-polyurea resin. Specifically, a combination of a polyisocyanate compound and a polyol compound, a combination of a polyisocyanate compound and a polythiol compound, a combination of a polyisocyanate compound and a polyamine compound, a combination of a polyisocyanate compound, a polyol compound and a polyamine compound, and a combination of a polyisocyanate compound, a polythiol compound and a polyamine compound are usable. These combinations of monomers can be used either individually or as a mixture. From now on, the addition polymerizable monomers are described in detail. (Al-1) polyisocyanate compound The polyisocyanate compound (hereinafter this may be simply referred to as component (Al-1)) is not specifically limited, and examples thereof include an aliphatic isocyanate compound such as bis(isocyanatomethyl)cyclohexane, bis(isocyanatomethyl)bicyclo[2.2.1]heptane, hydrogenated 2,6-tolylene diisocyanate, hydrogenated metaphenylene diisocyanate, hydrogenated paraphenylene diisocyanate, hydrogenated 2,4-tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene metadiisocyanate, hydrogenated xylylene paradiisocyanate, and hydrogenated isophorone diisocyanate; an aromatic isocyanate compound such as phenylene diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, xylylene tetramethyl diisocyanate, 2,6-naphthalene diisocyanate, and 1,5-naphthalene diisocyanate; an isocyanate compound without an alicyclic or aromatic ring such as hexamethylene diisocyanate,octamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, tetramethylene diisocyanate, biuret reaction product of hexamethylene diisocyanate, hexamethylene diisocyanate trimer, lysine diisocyanate, lysine triisocyanate, 1,6,11-undecane triisocyanate, and triphenylmethane triisocyanate; and a sulfur-containing isocyanate compound such as diphenyl disulfide-4,4'-diisocyanate, 2,2'-dimethyldiphenyl disulfide-5,5'-diisocyanate, 3,3'-dimethyldiphenyl disulfide-5,5'-diisocyanate, 3,3'-dimethyldiphenyl disulfide-6,6'-diisocyanate, 4,4'-dimethyldiphenyl disulfide-5,5'-diisocyanate, 3,3'-dimethoxydiphenyl disulfide-4,4'-diisocyanate, 4,4'-dimethoxydiphenyl disulfide-3,3'-diisocyanate, diphenyl sulfone-4,4'-diisocyanate, diphenyl sulfone-3,3'-diisocyanate, benzylidene sulfone-4,4'-diisocyanate, diphenylmethane sulfone-4,4'-diisocyanate, 4methyldiphenylmethane sulfone-2,4'-diisocyanate, sulfone-3,3'-diisocyanato de 4,4'dimethoxydiphenyl, sulfona de 3,3'-dimethoxy-4,4'diisocyanatodibencyl, sulfona-3,3'-diisocyanato de 4,4'dimetildifenil, sulfona-3,3'-diisocyanato de 4,4'-di-tert-butyldiphenyl, disulfona-3,3'-diisocyanato de 4,4'dimethoxybenzene-ethylene, sulfona-3,3'-diisocyanato de 4,4'diclorodiphenyl, éster 4-metil-3-isocyanatobencenosulfonyl4'-isocyanatofenol, éster 4-metoxi-3isocyanatobencenosulfonyl-4'-isocyanatofenol, 4-methyl-3-isocyanatobencenosulfonylanilido-3'-methyl-4'-isocyanate, dibencenosulfonyl-ethylenediamine-4,4'-diisocyanate, 4,4'dimethoxybencenosulfonyl-ethylenediamine-3,3'-diisocyanate, 4 rcíw nn / Lznz / E / YiAi methyl-3-isocyanatobencenosulfonylanilido-4-methyl-3'-isocyanate, thiophene-2,5-diisocyanate, thiophene-2,5diisocyanatomethyl, 1,4-dithiana-2,5-diisocyanate, 1,4-dithiana-2,5-diisocyanatomethyl, 1,4-dithiana-2,3diisocyanatomethyl, 1,4-dithiana-2-isocyanatomethyl-5isocyanatopropyl, 1,3-Dithiolano-4,5-diisocyanato, 1,3-dithiolano-4,5-diisocyanatomethyl, 1,3-dithiolano-2-methyl-4,5-diisocyanatomethyl, 1,3-dithiolane-2,2-diisocyanatoethyl, tetrahydrothiophene-2,5-diisocyanato, tetrahydrothiophene-2,5-diisocyanatomethyl, tetrahydrothiophene-2,5-diisocyanatoethyl, and tetrahydrothiophene-3,4-diisocyanatomethyl. Among these, alicyclic isocyanate compounds are preferred. Polythiol compound (Al-2) The polythiol compound (hereinafter this may be simply referred to as component (Al-2)) includes an aliphatic thiol such as methanedithiol, 1,2-ethanedithiol, 1,1-propanedithiol, 1,2-propanedithiol, 1,3-propanedithiol, 2,2-propanedithiol, 1,6-hexanedithiol, 1,2,3-propanetrithiol, tetrakis(mercaptomethyl)methane, 1,1-cyclohexanedithiol, 1,2-cyclohexanedithiol, 2,2-dimethylpropane-1,3-dithiol, 3,4-dimethoxybutane-1,2-dithiol, 2-methylcyclohexane-2,3-dithiol, 1,1-bis(mercaptomethyl)cyclohexane, bis(2-mercaptoethyl)thiomalate, (2-mercaptoethyl) 2,3-Dimercatosuccinate, 2,3-Dimercapto-l-propanol(2-mercaptoacetate), 2,3-Dimercapto-l,2propanol(3-mercaptoacetate), diethylene glycol bis(2rcíw nn / Lznz / E / YiAi mercaptoacetate), diethylene glycol bis(3-mercaptopropionate), 1,2-Dimercaptopropyl methyl ether, 2,3-Dimercaptopropyl methyl ether, 2,2-Bis(mercaptomethyl)-1,3propanedithiol ether, bis(2-mercaptoethyl), ethylene glycol bis(2mercaptoacetate), ethylene glycol bis(3-mercaptopropionate),trimethylolpropane tris(2-mercaptoacetate), trimethylolpropane tris(3-mercaptopropionate), pentaerythritol tetrakis(2-mercaptoacetate), pentaerythritol tetrakis(3-mercaptopropionate), and 1,2-bis(2-mercaptoethylthio)-3mercaptopropane; an aromatic thiol such as 1,2-dimercaptobenzene, 1,3-dimercaptobenzene, 1,4-dimercaptobenzene, 1,2-bis(mercaptomethyl)benzene, 1,3bis(mercaptomethyl)benzene, 1,4-bis(mercaptomethyl)benzene, 1,3-bis(mercaptoethyl)benzene, 1,4-bis(mercaptoethyl)benzene, 1,2-bis(meraptomethoxy)benzene, 1,3bis(mercaptomethoxy)benzene, 1,4-bis(mercaptomethoxy)benzene, 1,2-bis(mercaptoethoxy)benzene, 1,3-bis(mercaptoethoxy)benzene, 1,4-bis(mercaptoethoxy)benzene, 1,2,3-trimercaptobenzene, 1,2,4-trimercaptobenzene, 1,3,5-trimercaptobenzene, 1,2,3-tris(mercaptomethyl)benzene, 1,2,4-tris(mercaptomethyl)benzene, 1,3,5-tris(mercaptomethyl)benzene, 1,2,3-tris(mercaptoethyl)benzene, 1,2,4-tris(mercaptoethyl)benzene, 1,3,5-tris(mercaptoethyl)benzene, 1,2,3-tris(mercaptomethoxy)benzene, 1,2,4-tris(mercaptomethoxy)benzene, 1,3,5Rcn; nn / Lznz / E / YiAi tris(mercaptomethoxy)benzene, 1,2,312 tris(mercaptoethoxy)benzene, 1,2,4-tris(mercaptoethoxy)benzene, 1,3,5-tris(mercaptoethoxy)benzene, 1,2,3,4tetramercaptobenzene, 1,2,3,5-tetramercaptobenzene, 1,2,4,5tetramercaptobenzene, 1,2,3,4tetrakis(mercaptomethyl)benzene, 1,2,3,5-tetrakis(mercaptomethyl)benzene, 1,2,4,5-tetrakis(mercaptomethyl)benzene, 1,2,3,4-tetrakis(mercaptoethyl)benzene, 1,2,3,5tetrakis(mercaptoethyl)benzene, 1,2,4,5-tetrakis(mercaptoethyl)benzene, 1,2,3,4-Tetrakis(mercaptoethyl)benzene, 1,2,3,5-Tetrakis(mercaptomethoxy)benzene, 1,2,4,5-Tetrakis(mercaptomethoxy)benzene, 1,2,3,4-Tetrakis(mercaptoethoxy)benzene, 1,2,3,5-Tetrakis(mercaptoethoxy)benzene, 1,2,4,5-Tetrakis(mercaptoethoxy)benzene, 2,2'-Dimercaptobiphenyl, 4,4'-Dimercaptobiphenyl, 4,4'-Dimercaptobibenzyl, 2,5-Toluenedithiol, 3,4-Toluenedithiol, 1,4-Naphthalenedithiol, 1,5-Naphthalenedithiol, 2,6-Naphthalenedithiol, 2,7-Naphthalenedithiol, 2,4-dimethylbenzene-l, 3dithiol, 4,5-dimethylbenzene-l,3-dithiol, 9,10anthracenedimethanethiol, 1,3-di (p-methoxyphenyl)propane-2,2-dithiol, 1,3-diphenylpropane-2,2-dithiol, phenylmethane-1,1-dithiol, and 2,4-di(p-mercaptophenyl)pentane; a substituted halogen, for example, aromatic thiol, substituted with chlorine or substituted with bromine such as 2,5-dichlorobenzene-1,3-dithiol, 1,3-di(p-chlorophenyl)propane-2,2-dithiol, 3,4,5-1-ribromo-1,2-dimercaptobenzene, and 2,3,4,6-tetrachloro-1,513 bis(mercaptomethyl)benzene; an aliphatic thiol having a sulfur atom in addition to a mercapto group, such as 1,2bis(mercaptomethylthio)benzene, 1,3-bis(mercaptomethylthio)benzene, 1,4-bis(mercaptomethylthio)benzene, 1,2bis(mercaptoethylthio)benzene, 1,3-bis(mercaptoethylthio)benzene, 1,4-bis(mercaptoethylthio)benzene, 1,2,3tris(mercaptomethylthio)benzene, 1,2,4-tris(mercaptomethylthio)benzene, 1,3,5-tris(mercaptomethylthio)benzene, 1,2,3tris(mercaptoethylthio)benzene, 1,2,4-tris(mercaptoethylthio)benzene, 1,3,5-tris(mercaptomethylthio)benzene, 1,2,3,4-tetrakis(mercaptomethylthio)benzene, 1,2,3,5-tetrakis(mercaptomethylthio)benzene, 1,2,4,5-tetrakis(mercaptomethylthio)benzene,1,2,3,4-tetrakis(mercaptoethylthio)benzene, 1,2,3,5-tetrakis(mercaptoethylthio)benzene, 1,2,4,5-tetrakis(mercaptoethylthio)benzene, and alkylated compounds thereof; an aliphatic thiol having a sulfur atom in addition to a mercapto group, such as bis(mercaptomethyl)sulfide, bis(mercaptoethyl)sulfide, bis(mercaptopropyl)sulfide, bis(mercaptomethylthio)methane, bis(2-mercaptoethylthio)methane, bis(3-mercaptopropylthio)methane, 1,2bis(mercaptomethylthio)ethane, 1,2-bis(2-mercaptoethylthio)ethane, 1,2-bis(3-mercaptopropylthio)ethane, 1,3bis(mercaptomethylthio)propane, 1,3-bis(2-mercaptoethylthio)propane, 1,3-Bis(314 mercaptopropylothio)propane, 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane, 2-mercaptoethylthio-l,3-propanedithiol, 1,2,3tris(mercaptomethylthio)propane, l,2,3-tris(2mercaptoethylthio)propane, 1,2,3-tris(3mercaptopropylothio)propane, tetrakis(mercaptomethylthiomethyl)methane, tetrakis(2mercaptoethylthiomethyl)methane, tetrakis(3mercaptopropylothiomethyl)methane, bis(2,3-dimercaptopropyl)sulfide, 2,5-dimercapto-l,4-dithiane disulfide, Rcn; nn / Lznz / E / YiAi bis(mercaptomethyl) , bis(mercaptoethyl) disulfide , and bis(mercaptopropyl) disulfide , and esters thereof with thioglycolic acid and mercaptopropionic acid, hydroxymethylsulfide bis(2-meraptoacetate) , mercaptopropionate), hydroxymethylsulfide hydroxyethylsulfide bis(3bis(2mercaptoacetate) , mercaptopropionate), mercaptoacetate), mercaptopropionate), mercaptoacetate), mercaptopropionate), mercaptoacetate), mercaptopropionate), mercaptoacetate), mercaptopropionate), mercaptoacetate), hydroxyethylsulfide hydroxypropylsulfide hydroxypropylsulfide hydroxymethyldisulfide hydroxymethyldisulfide hydroxyethyldisulfide hydroxyethyldisulfide hydroxypropyldisulfide hydroxypropyldisulfide 2-mercaptoethyl ether 2-mercaptoethyl ether bis (3bis (2bis (3bis (2bis (3bis (2bis (3bis (2bis (3bis (2bis (3bis (315 mercaptopropionate), 1,4-dithiana-2,5-diol bis(2mercaptoacetate), 1,4-dithiana-2,5-diol bis(3meraptopropionate), (2-mercaptoethyl) thioglycolate, bis(2-mercaptoethyl) thiodipropionate, bis(2-mercaptoethyl) 4,4'-thiodibutyrate, bis(2-mercaptoethyl) dithiodiglycolate, bis(2-mercaptoethyl) dithiodipropionate, 4,4'dithiodibutyrate, bis(2,3dimercaptopropyl) thiodiglycolate, bis(2,3dimercaptopropyl) thiodipropionate, bis(2,3dimercaptopropyl) dithiodiglycolate, bis(2,3dimercaptopropyl) dithiodipropionate, bis(2,3dimercaptopropyl) dithiodiglycolate, bis(2,3dimercaptopropyl) dithiodipropionate (2,3dimercaptopropyl) , 4-mercaptometil-3,6-dithiaoctane-1, 8dithiol, 5,7-dimercaptometil-l,1l-dimercapto-3, 6, 9tritiaundecane, 4,7-dimercaptometil-1,1l-dimercapto-3, 6, 9tritiaundecane, 4,8-dimercaptomethyl-1,1l-dimercapto-3, 6, 9tritianundecane, y bis (1,3-dimercapto-2-propyl) sulfur;and a heterocyclic compound having a sulfur atom in addition to a mercapto group, such as 3,4-thiophene-dithiol, tetrahydrothiophene-2,5-dimercaptomethyl, 2,5-dimercapto-l,3,4-thiadiazole, 2,5-dimercapto-l,4-dithiane, and 2,5-dimercaptomethyl1,4-dithiane. (Al-3 polyol compound); Examples of the polyol compound (hereinafter this may be simply referred to as component (Al-3)) include an aliphatic polyol such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, Rcn; nn / Lznz / E / YiAi butylene glycol, neopentyl glycol, glycerin, trimethyllethane, trimethyllpropane, butanetriol, 1,2-methylglucoside, pentaerythritol, dipentaerythritol, tripentaerythritol, triethylene glycol, polyethylene glycol, tris(2-hydroxyethyl)isocyanurate, cyclobutanediol, cyclopentanediol, cyclohexanediol, cycloheptanodiol, cyclooctanediol, bicyclo[4.3.0]-nonanodiol, dicyclohexanediol, tricyclo[5.3.1.1]dodecanediol, expiro[3.4] octanediol, and butylcyclohexanediol; an aromatic polyol such as dihydroxynaphthalene, trihydroxynaphthalene, tetrahydroxynaphthalene, dihydroxybenzene, benzenetriol, trihydroxyphenanthrene, bisphenol A, bisphenol F, xylylene glycol, or tetrabromobisphenol A, and an addition reaction product thereof with an alkylene oxide such as ethylene oxide or propylene oxide; bis-[4-(hydroxyethoxy)phenyl] sulfide, bis-[4-(2-hydroxypropoxy)phenyl] sulfide, bis-[4-(2,3-dihydroxypropoxy)phenyl] sulfide, bis-[4[(4-hydroxycyclohexyloxy)phenyl] sulfide, bis[2-methyl-4(hydroxyethoxy)-6-butylphenyl] sulfide, and a compound prepared by adding on average 3 molecules, per one hydroxy group, of ethylene oxide and / or propylene oxide to any of these compounds; and a sulfur atom-containing polyol such as bis(2-hydroxyethyl) sulfide, 1,2-bis-(2-hydroxyethylmercapto)ethane, bis(2-hydroxyethyl) disulfide, rcíw nn / Lznz / E / YiAi. 1,4-dithiane-2,5-diol, bis(2,3-dihydroxypropyl) sulfide, tetrakis(4-hydroxy-2-thiabyl)methane, bis(4-hydroxyphenyl) sulfone (trade name, Bisphenol S), tetrabromobisphenol S, tetramethylbisphenol S, 4,4'-thiobis(6-tert-butyl-3-methylphenol), and 1,3-bis(2-hydroxyethylthioethyl)-cyclohexane. Polyamine compound (Al-4) Examples of the polyamine compound (from now on this can be simply referred to as an (Al4) component) include hexamethylenediamine, and bis(4-aminocyclohexyl)methane. Cationic polymerizable monomer (A2) Not specifically limited, any known cationic polymerizable monomer is usable in the present invention, and is, for example, a monomer that is a raw material for obtaining an epoxy resin and a polysulfide resin. Specifically, examples thereof include an epoxy compound, a polyepithium compound, and a polythiol compound that are polymerizable monomers in a ring-opening polymerization mode, and a compound that is prepared by the reaction of a polyepithium compound and a polythiol compound. Any polyepoxy compound, polyepithium compound, or polythiol compound known as a monomer (hereinafter these may be simply referred to as a component (A2-1), a component (A2-2), and a component (A2-3), respectively) is usable without Rcn; nn / Lznz / E / YiAi limitation. For the polythiol compound, those exemplified herein above as the component (Al-2) are usable. From now on, the cationic polymerizable monomer is described in detail. Polyepoxy compound (A2-1) The polyepoxy compound is roughly grouped into an aliphatic epoxy compound, an alicyclic epoxy compound and an aromatic epoxy compound, and specific examples thereof are shown below. The aliphatic epoxy compound includes ethylene oxide, 2-ethyloxirane, butyl glycidyl ether, phenyl glycidyl ether, 2,2'-methylenebisoxirane, 1,6-hexanediol diglycidyl ether, ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, triethylene glycol diglycidyl ether, tetraethylene glycol diglycidyl ether, nonamethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, dipropylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, tetrapropylene glycol diglycidyl ether, nonapropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, trimethylolpropane triglycidyl ether, glycerol triglycidyl ether, diglycerol, pentaerythritol tetraglycidyl ether, tris(2-hydroxyethyl)isocyanurate diglycidyl ether, and tris(2-hydroxyethyl)isocyanurate triglycidyl ether. The alicyclic epoxy compound includes isophoronediol diglycidyl ether, and bis2,2-hydroxycyclohexylpropane diglycidyl ether. The aromatic epoxy compound includes resorcinol diglycidyl ether, bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, bisphenol S diglycidyl ether, diglycidyl orthophthalate, phenol-novolak polyglycidyl ether, and cresol-novolak polyglycidyl ether. Polyepithium compound (A2-2) Specific examples of the polyepithium compound include an epithioethylthio compound such as bis(1,2-epithioethyl)sulfide, bis(1,2-epithioethyl)disulfide, bis(epithioethylthio)methane, bis(epithioethylthio)benzene, bis[4-(epithioethylthio)phenyl]sulfide, and bis[4(epithioethylthio)phenyl]methane; a linear aliphatic 2,3-epithiopropylthio compound such as bis(2,3-epithiopropyl) sulfide, bis(2,3-epithiopropyl) disulfide, bis(2,3-epithiopropylthio)methane, 1,2-bis(2,3-epithiopropylthio)ethane, 1,2-bis(2,3-epithiopropylthio)propane, 1,3-bis(2,3-epithiopropylthio)propane, 1,3-bis(2,3-epithiopropylthio)-2-methylpropane, 1,4-bis(2,3-epithiopropylthio)butane, 1,4bis(2,3-epithiopropylthio)-2-methylbutane, 1,3-bis(2,3-epithiopropylthio)butane, 1,5-bis(2,3-epithiopropylthio)pentane, 1,5-bis (2,3-epithiopropylthio)-2-methylpentane, 1,5-bis(2,3rcíw nn / Lznz / E / YiAi epithiopropylthio)-3-thiapentane, 1,6-bis(2,3epithiopropylthio)hexane, 1,6-bis(2,3-epithiopropylthio)-2methylhexane, 1,8-bis (2,3-epithiopropylthio)-3,6-dithiaoctane, 1,2,3-tris(2,3-epithiopropylthio)propane, 2,2-bis(2,3-epithiopropylthio)-1,3-bis(2,3-epithiopropylthiomethyl)propane, 2,2-bis(2,3-epithiopropylthiomethyl)-1-(2,3-epithiopropylthio)butane, 1,5-bis (2,3-epithiopropylthio)-2-(2,3epithiopropylthiomethyl)-3-thiapentane, 1,5-bis(2,3epithiopropylthio)-2,4-bis(2,3-epithiopropylthiomethyl)-3thiapentane, 1-(2,3-epithiopropylthio)-2,2-bis(2,3epithiopropylthiomethyl)-4-thiahexane, 1,5,6-tris(2,3-epithiopropylthio)-4-(2,3-epithiopropylthiomethyl)-3-thiahexane, 1,8-bis(2,3-epithiopropylthio)-4-(2,3-epithiopropylthiomethyl)3,6-dithiaoctane, 1,8-bis(2,3-epithiopropylthio)-4,5-bis(2,3epithiopropylthiomethyl)-3,6-dithiaoctane, 1,8-bis(2,3epithiopropylthio)-4,4-bis(2,3-epithiopropylthiomethyl)-3,6dithiaoctane, 1,8-bis(2,3-epithiopropylthio)-2,5-bis(2,3epithiopropylthiomethyl)-3,6-dithiaoctane, 1,8-bis(2,3epithiopropylthio)-2,4,5-tris(2,3epithiopropylthiomethyl)-3,6dithiaoctane, 1,1,1-tris[[2-(2,3-epithiopropylthio)ethyl]thiomethyl]-2-(2,3-epithiopropylthio)ethane, 1,1,2,2-tetrakis[[2-(2,3-epithiopropylthio)ethyl]thiomethyl]ethane, 1,11-bis(2,3-epithiopropylthio)-4,8-bis(2,3-epithiopropylthiomethyl)3,6,9-trithiaundecane, 1,11-bis(2,3-epithiopropylthio)-4,7-bis(2,3-epithiopropylthiomethyl)-3,6,9 rcíw nn / Lznz / E / Yii trithiaundecane, and 1,11-bis(2,3-epithiopropylthio)-5,7-bis(2,3epithiopropylthiomethyl)-3,6,9-trithiaundecane; a cycloaliphatic 2,3-epithiopropylthio compound such as 1,3-bis(2,3-epithiopropylthio)cyclohexane, 1,4-bis(2,3-epithiopropylthio)cyclohexane, 1,3-bis(2,3-epithiopropylthiomethyl)cyclohexane, 1,4-bis(2,3-epithiopropylthiomethyl)cyclohexane, 2,5-bis(2,3-epithiopropylthiomethyl)-1,4-dithiane, 2,5-bis[[2-(2,3-epithiopropylthio)ethyl]thiomethyl]-1,4-dithiane, and 2,5-bis(2,3-epithiopropylthiomethyl)-2,5-dimethyl-1,4-dithiane; an aromatic 2,3-epithiopropylthio compound such as 1,2-bis(2,3-epithiopropylthio)benzene, 1,3-bis(2,3-epithiopropylthio)benzene, 1,4-bis(2,3-epithiopropylthio)benzene, 1,2-bis(2,3-epithiopropylthiomethyl)benzene, 1,3-bis(2,3-epithiopropylthiomethyl)benzene, 1,4-bis(2,3-epithiopropylthiomethyl)benzene,bis[4-(2,3epithiopropylthio)phenyl]methane, 2,2-bis[4-(2,3epithiopropylthio)phenyl]propane, bis[4-(2,3epithiopropylthio)phenyl] sulfide, bis[4-(2,3-epithiopropylthio)phenyl]sulfone, and 4,4'-bis(2,3-epithiopropylthio)biphenyl; a linear aliphatic 2,3-epithiopropyloxy compound such as bis(2,3-epithiopropyl) ether, bis(2,3-epithiopropyloxy)methane, 1,2-bis(2,3-epithiopropyloxy)ethane, 1,2-bis(2,3-epithiopropyloxy)propane, 1,3-bis(2,3-epithiopropyloxy)propane, 1,3-bis(2,3-epithiopropyloxy)-2-methylpropane, 1,4-bis(2,322 epithiopropyloxy)butane, 1,4-bis(2,3-epithiopropyloxy)-2methylbutane, 1,3-bis(2,3-epithiopropyloxy)butane, 1,5-bis(2,3-epithiopropyloxy)pentane, 1,5-bis(2,3-epithiopropyloxy)-2methylpentane, 1,5-bis(2,3-epithiopropyloxy)-3-thiapentane, 1,6-bis(2,3-epithiopropyloxy)hexane, 1,6-bis(2,3-epithiopropyloxy)-2-methylhexane, 1,8-bis(2,3-epithiopropyloxy)-3,6-dithiaoctane, 1,2,3-tris(2,3-epitiopropiloxi)propano, 2,2-bis(2,3epitiopropiloxi)-1,3-bis(2,3-epitiopropiloximetil)propano, 2,2-bis(2,3-epitiopropiloximetil)-1-(2,3epitiopropiloxi)butano, 1,5-bis(2,3-epitiopropiloxi) -2-(2,3epitiopropiloximetil)-3-tiapentano, 1,5-bis (2,3epitiopropiloxi)-2,4-bis(2,3-epitiopropiloximetil)-3tiapentano, 1- (2,3-epitiopropiloxi)-2,2-bis(2,3epitiopropiloximetil)-4-tiahexano, 1,5,6-tris(2,3epitiopropiloxi)-4-(2,3-epitiopropiloximetil)-3-tiahexano, 1,8-bis(2,3-epitiopropiloxi)-4-(2,3-epitiopropiloximetil)3,6-ditiaoctano, 1,8-bis(2,3-epitiopropiloxi)-4,5-bis(2,3epitiopropiloximetil)-3,6-ditiaoctano, 1,8-bis (2,3epitiopropiloxi)-4,4-bis(2,3-epitiopropiloximetil)-3,6ditiaoctano, 1,8-bis (2,3-epitiopropiloxi)-2,5-bis(2,3epitiopropiloximetil)-3,6-ditiaoctano, 1,8-bis(2,3epitiopropiloxi)-2,4,5-tris(2,3-epitiopropiloximetil)-3,6ditiaoctano, 1,1,1-tris[[2-(2,3epitiopropiloxi)etilo]tiometil]-2-(2,3-epitiopropiloxi)etano, 1,1,2,2-tetraquis[[2-(2,3Rcn / nn / Lznz / B / Yi [epithiopropyloxy]ethyl]thiomethyl]ethane, 1,11-bis(2,3-epithiopropyloxy)-4,8-bis(2,3-epithiopropyloxymethyl)-3,6,9-tritiaundecane, 1,11-bis(2,3-epithiopropyloxy)-4,7-bis(2,3-epithiopropyloxymethyl)-3,6,9-tritiaundecane, and 1,11-bis(2,3-epithiopropyloxy)-5,7-bis(2,3-epithiopropyloxymethyl-3,6,9-tritiaundecane; a 2,3-epithiopropyloxy cycloaliphatic compound such as 1,3-bis(2,3-epithiopropyloxy)cyclohexane, 1,4-bis(2,3-epithiopropyloxy)cyclohexane, 1,3-bis(2,3-epithiopropyloxymethyl)cyclohexane, 1,4-bis(2,3-epithiopropyloxymethyl)cyclohexane, 2,5-bis(2,3-epithiopropyloxymethyl)-1,4-dithiane, 2,5-bis[[2-(2,3-epithiopropyloxy)ethyl]thiomethyl]-1,4-dithiane, and 2,5-bis(2,3-epithiopropyloxymethyl)-2,5-dimethyl-1,4-dithiane; and an aromatic 2,3-epithiopropyloxy compound such as 1,2-bis(2,3-epithiopropyloxy)benzene, 1,3-bis(2,3-epithiopropyloxy)benzene, 1,4-bis(2,3-epithiopropyloxy)benzene, 1,2-bis(2,3- epithiopropyloxymethyl)benzene, 1,3-bis(2,3- epithiopropyloxymethyl)benzene, 1,4-bis(2,3- epithiopropyloxymethyl)benzene, bis[4-(2,3- epithiopropyloxy)phenyl]methane, 2,2-bis[4-(2,3- epithiopropyloxy)phenyl]propane, bis[4-(2,3- epithiopropyloxy)phenyl] sulfide, bis[4-(2,3- epithiopropyloxy)phenyl] sulfone, and 4,4'-bis(2,3- epithiopropyloxy)biphenyl. Polyethylene compound (A2-3) As the polythiethane compound, a metal-containing thiethane compound or a non-metal thiethane compound is usable. As described in WO2005 / 095490 and JP 2003-327583 A, these polythiethane compounds have one or more thiethanyl groups in the molecule. A compound having 2 or more thiethanyl groups in total is preferred. Examples thereof include a sulfide-type thiethane compound such as bisthiethanyl sulfide, bis(3-thiethanylthio) disulfide, bis(3-thiethanylthio)methane, and 3—(((3T—thiethanylthio)methylthio)methylthio)thiethan; and a polysulfide-type thiethane compound such as bis(3-thiethanyl) disulfide, bis(3-thiethanyl) trisulfide, bis(3-thiethanyl) tetrasulfide, and bis(3-thiethanyl) pentasulfide. Radical polymerizable monomer (A3) Without specific limitation, any known radical polymerizable monomer is usable in the present invention, and for example, a (meth)acrylate compound (hereinafter this may be simply referred to as a component (A3-1)) and a radical polymerizable compound having unsaturated carbon-carbon bonding, without (meth)acrylate group (hereinafter this may be simply referred to as a vinyl compound or a component (A3-2)) can be used either individually or as a radical polymerizable compound. Rcn; nn / Lznz / E / YiAi combined. (Meth)acrylate compound (A3-1) As (meth)acrylate compound, any known compound that has at least one (meth)acrylate group in the usable molecule without specific limitation. Specific examples of the (meth)acrylate compound include glycidyl (meth)acrylate, trimethylolpropane tri(meth)acrylate, tetramethylolmethane tri(meth)acrylate, trimethylolpropane triethylene glycol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, urethane oligomer tetra(meth)acrylate, urethane oligomer hexa(meth)acrylate, polyester oligomer hexa(meth)acrylate, ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate (especially having an average molecular weight of 308, 330, 508 or 736), di(meth)acrylate tripropylene glycol, bisphenol A di(meth)acrylate, 2,2-bis[4((meth)acryloyloxypolyethoxy)phenyl]propane (especially having an average molecular weight of 478, 776 or 804),Methoxypolyethylene glycol (meth)acrylate, methoxypolyethylene glycol (meth)acrylate (especially having an average molecular weight of 468), and methyl (meth)acrylate. Vinyl compound (A3-2), Specific examples of the vinyl compound include methyl vinyl ketone, ethyl vinyl ketone, ethyl vinyl ether, styrene, vinylcyclohexane, butadiene, 1,4-pentadiene, divinyl sulfide, divinyl sulfone, 1,2-divinylbenzene, 1,3-divinyl1,1,3,3-tetramethylpropanedisiloxane, diethylene glycol divinyl ether, divinyl adipate, divinyl sebacate, ethylene glycol divinyl ether, divinyl sulfoxide, divinyl persulfide, dimethyldivinylsilane, 1,2,4-trivinylcyclohexane, methyltrivinylsilane, α-methylstyrene and α-methylstyrene money. Examples thereof further include diethylene glycol bisallyl carbonate, methoxypolyethylene glycol allyl ether (especially having an average molecular weight of 550), methoxypolyethylene glycol allyl ether (especially having an average molecular weight of 350), methoxypolyethylene glycol allyl ether (especially having an average molecular weight of 1500), polyethylene glycol allyl ether (especially having an average molecular weight of 450), methoxypolyethylene glycol-polypropylene glycol allyl ether (especially having an average molecular weight of 750), butoxypolyethylene glycol-polypropylene glycol allyl ether (especially having an average molecular weight of 1600), methacryloyloxypolyethylene glycol-polypropylene glycol allyl ether (especially having an average molecular weight of 560), phenoxypolyethylene glycol allyl ether (especially that it has an average molecular weight of 600), Rcn; nn / Lznz / E / YiAi methacryloyloxypolyethylene glycol allyl ether (especially having an average molecular weight of 430), acryloyloxypolyethylene glycol allyl ether (especially having an average molecular weight of 420), vinyloxypolyethylene glycol allyl ether (especially having an average molecular weight of 560), styryloxypolyethylene glycol allyl ether (especially having an average molecular weight of 650), and methoxypolyethylene glycol allyl thioether (especially having an average molecular weight of 730). The polymerizable monomer (A) is preferably a combination of a polyisocyanate compound and a polythiol compound, a combination of a polyisocyanate compound and a polyol compound, a polyepithium compound and / or a polythiethane compound, or a combination of a polyepithium compound and a polythiol compound. Among the above, the polymerizable monomer (A) is more preferably a combination of a polyisocyanate compound and a polythiol compound, or a combination of a polyepithium compound and a polythiol compound. In the case where the polymerizable monomer (A) is a combination of a polyisocyanate compound and a polythiol compound, in particular, the polymerizable monomer (A) preferably contains at least one polyisocyanate compound selected from bis(isocyanatomethyl)bicyclo[2.2.1]heptane, xylylene diisocyanate, diphenylmethane diisocyanate and tolylene diisocyanate, and at least one polythiol compound selected from pentaerythritol tetrakis(3-mercaptopropionate) and 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane. In the case where the polymerizable monomer (A) is a combination of an epithio compound and a polythiol compound, in particular, the polymerizable monomer (A) preferably contains bis(2,3-epithiopropyl) disulfide, and a mixture consisting mainly of 5,7-dimercaptomethyl1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl1,11-dimercapto-3,6,9-trithiaundecane and 4,8-dimercaptomethyl1,11-dimercapto-3,6,9-trithiaundecane. Benzotriazole-based UV absorbing material (B) having a maximum absorption wavelength of 360 nm or more and less than 380 nm In the present invention, the optical material composition contains a benzotriazole-based UV absorber having a maximum absorption wavelength of 360 nm or more and less than 380 nm (B) (hereinafter this may be simply referred to as component (B)), so as to be provided with the ability to cut off UV rays and blue light. The benzotriazole-based UV absorbing material in the present invention is represented by the following formula (1) In the present invention, the maximum absorption wavelength means a wavelength at which an absorption peak (a peak of a convex-shaped spectrum) occurs in an absorption spectrum. The plural maximum absorption wavelength can be confirmed, and in this case, it is sufficient that at least one maximum absorption wavelength is confirmed in a wavelength range specifically defined in the present invention. For example, the benzotriazole-based UV-absorbing material having a maximum absorption wavelength of 60 nm or more and less than 380 nm means a benzotriazole-based UV-absorbing material, of which at least one maximum absorption wavelength exists in a range of 360 nm or more and less than 380 nm. HO Rcn? nn / Lznz / E / YiA wherein R1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a hydroxy group, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, a linear or branched di-substituted amino group having 1 to 4 carbon atoms, a nitro group, a carboxy group, an alkyloxycarbonyl group in which the alkyl group has 1 to 8 carbon atoms, in which the hydroxyalkyl group has 1 to 8 carbon atoms, an alkylcarbonyloxyalkyl group in which the alkyl groups each have 1 to 8 carbon atoms, a carboxyalkyl group in which the alkyl group has 1 to 3 carbon atoms, an alkyloxycarbonylalkyl group in which the alkyl groups have 2 to 10 carbon atoms in total, one aryl group, one acyl group, one sulfo group or one cyano group;R2 represents a hydroxy group, an alkoxy group having 1 to 8 carbon atoms, an alkylthio group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, or a linear or branched di-substituted amino group having 1 to 4 carbon atoms; R3 represents a hydrogen atom, a hydroxy group, an alkyl group or an alkoxy group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, or a linear or branched di-substituted amino group having 1 to 4 carbon atoms; and R2 and R3 can be crosslinked to form a cyclic structure. In the general formula (1), specific examples of R1 include a hydrogen atom; an optionally substituted, linear or branched alkyl group having 1 to 8 carbon atoms, such as a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a phenyl ... Rcn; nn / Lznz / E / YiAi n-hexyl, an n-octyl group, and a 2-ethylhexyl group; an optionally substituted, linear or branched alkoxy group having 1 to 8 carbon atoms, such as a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a sec-butoxy group, a tert-butoxy group, an n-hexyloxy group, an n-octyloxy group, and a 2-ethylhexyloxy group; a hydroxy group; an optionally substituted, linear or branched amino group having 1 to 4 carbon atoms, such as an amino group, a monomethylamino group, a dimethylamino group, a monoethylamino group, a diethylamino group, a mono-n-propylamino group, a di-n-propylamino group, a mono-isopropylamino group, and a diisopropylamino group; a nitro group; a carboxy group;an optionally substituted, linear or branched alkyloxycarbonyl group in which the alkyl group has 1 to 8 carbon atoms, such as a methoxycarbonyl group, an ethoxycarbonyl group, an isopropoxycarbonyl group, an n-butoxycarbonyl group, an isobutoxycarbonyl group, a sec-butoxycarbonyl group, a tert-butoxycarbonyl group, an n-hexyloxycarbonyl group, an n-octyloxycarbonyl group, and a 2-ethylhexyloxycarbonyl group; an optionally substituted, linear or branched hydroxyalkyl group having 1 to 8 carbon atoms, such as a hydroxymethyl group, a hydroxyethyl group, a hydroxypropyl group, a hydroxybutyl group, a hydroxyhexyl group, and a hydroxyoctyl group;an optionally substituted linear or branched alkylcarbonyloxyalkyl group having 1 to 8 carbon atoms, such as a methylcarbonyloxymethyl group, an ethylcarbonyloxymethyl group, a propylcarbonyloxymethyl group, a butylcarbonyloxymethyl group, a hexylcarbonyloxymethyl group, a heptylcarbonyloxymethyl group, an octylcarbonyloxymethyl group, a methylcarbonyloxyethyl group, an ethylcarbonyloxyethyl group, a propylcarbonyloxyethyl group, a butylcarbonyloxyethyl group, a hexylcarbonyloxyethyl group, a heptylcarbonyloxyethyl group, and an octylcarbonyloxyethyl group; a carboxyalkyl group such as a carboxymethyl group, a carboxyethyl group, and a carboxypropyl group; a linear or branched alkyloxycarbonylalkyl group in which the alkyl groups each have 1 to 8 carbon atoms, such as a methyloxycarbonylmethyl group, an ethyloxycarbonylethyl group, and a propyloxycarbonylethyl group;an aryl group such as a phenyl group, a benzyl group, a tolyl group, and a xylyl group; an acyl group such as a formyl group, an acetyl group, a propionyl group, a butyryl group, and a benzoyl group; a sulfo group; and a cyano group. Specific examples of R2 include a hydroxy group; an optionally substituted, linear, or branched alkoxy group having 1 to 8 carbon atoms, such as a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a sec-butoxy group, a tert-butoxy group, an n-hexyloxy group, an n-octyloxy group, and a 2-ethylhexyloxy group; an optionally substituted, linear or branched alkylthio group having 1 to 8 carbon atoms, such as a methylthio group, an ethylthio group, a propylthio group, an isopropylthio group, an n-butylthio group, an isobutylthio group, a sec-butylthio group, a tert-butylthio group, an n-hexylthio group, an n-octylthio group, and a 2-ethylhexylthio group;and an optionally substituted, linear or branched amino group having 1 to 4 carbon atoms, such as a monomethylamino group, a dimethylamino group, a monoethylamino group, a diethylamino group, a mono-n-propylamino group, a di-n-propylamino group, a monoisopropylamino group, and a di-isopropylamino group. Specific examples of R3 include a hydrogen atom; a hydroxy group; an optionally substituted, linear or branched alkyl group having 1 to 8 carbon atoms, such as a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an n-hexyl group, an n-octyl group, and a 2-ethylhexyl group; an optionally substituted, linear or branched alkoxy group having 1 to 8 carbon atoms, such as a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, an n-butoxy group, a; Rcn; nn / Lznz / E / YiAi isobutoxy group, a sec-butoxy group, a tert-butoxy group, an n-hexyloxy group, an n-octyloxy group, and a 2-ethylhexyloxy group; and an optionally substituted, linear or branched amino group having 1 to 4 carbon atoms, such as a monomethylamino group, a dimethylamino group, a monoethylamino group, a diethylamino group, a mono-n-propylamino group, a di-n-propylamino group, a monoisopropylamino group, and a di-isopropylamino group. In case where R2 and R3 form a crosslinked cyclic structure, examples thereof include a methylenedioxy group, and an ethylenedioxy group. Among those mentioned above, the benzotriazole derivative compound represented by the general formula (1) is preferably such that R1 is a hydrogen atom, a methyl group, a methoxy group, an n-octyloxy group, a hydroxy group, a carboxy group, a methoxycarbonyl group, an ethoxycarbonyl group, an isopropoxycarbonyl group, an n-butoxycarbonyl group, an isobutoxycarbonyl group, a sec-butoxycarbonyl group, a tert-butoxycarbonyl group, an n-hexyloxycarbonyl group, an n-octyloxycarbonyl group, a hydroxyethyl group, a methylcarbonyloxyethyl group, or a heptylcarbonyloxyethyl group, R2 is a methoxy group, an ethoxy group, an n-octyloxy group, a dimethylamino group, or a diethylamino group, and R3 is a hydrogen atom, a methyl group, an ethyl group, a methoxy group, a group ethoxy, a noctyloxy group, or a dimethylamino group, and in case where R2 and R3 form a cross-linked cyclic structure, a methylenedioxy group is preferred. At this point, preferably, an electron-donating substituent is selected for R2 or for R2 and R3, and / or an electron-withdrawing substituent is selected for R1, from the point of view of the maximum absorption wavelength. The electron-donating substituent includes a hydroxy group, an alkoxy group having 1 to 8 carbon atoms, an alkylthio group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, and a linear or branched di-substituted amino group having 1 to 4 carbon atoms. As mentioned above, in a case where R2 and R3 are crosslinked to form a methylenedioxy group, R2 and R3 are electron-donating substituents. The electron-withdrawing substituent includes a nitro group, a carboxy group, an alkyloxycarbonyl group, an acyl group, a sulfo group, and a cyano group. Examples of the benzotriazole derivative compound represented by the general formula (1) in the present invention include 2-(2-hydroxy-4-dimethylaminophenyl)-5-methyloxycarbonyl-2H-benzotriazole, 2-(2-hydroxy-4-dimethylaminophenyl)-5-ethyloxycarbonyl-2H-benzotriazole, 2-(2-hydroxy-4-dimethylaminophenyl)-5-butyloxycarbonyl-2H-benzotriazole, 2-(2-hydroxy-4-dimethylaminophenyl)-5-octyloxycarbonyl-2H-benzotriazole, 2-(2-hydroxy-4-dimethylaminophenyl)-5-methyl-2H-benzotriazole, 2-(2-hydroxy-4-diethylaminophenyl)-5-butyloxycarbonyl-2H-benzotriazole, 2-(2-hydroxy-4-dimethylamino-5-methylphenyl)-5-methyloxycarbonyl-2H-benzotriazole, 2- (2-Hydroxy-4-dimethylamino-5-methylphenyl)-5-butyloxycarbonyl-2H-benzotriazole, 2-(2-hydroxy-4-dimethylamino-5-methylphenyl)-5-octyloxycarbonyl-2Hbenzotriazole, 2-(2-hydroxy-4-dimethylamino-5-methylphenyl)-5methyl-2H-benzotriazole, 2-(2-hydroxy-4,5-dimethoxyphenyl)-5methyloxycarbonyl-2H-benzotriazole, 2-(2-hydroxy-4,5dimethoxyphenyl)-5-butyloxycarbonyl-2H-benzotriazole, 2- (2hydroxy-4,5-dimethoxyphenyl)-5-octyloxycarbonyl-2Hbenzotriazole, 2-(2-hydroxy-4,5-dimethoxyphenyl)-5-methyl-2Hbenzotriazole, 6-(5-heptylcarbonyloxyethyl-2H-benzotriazol-2yl)benzo[1,3]dioxol-5-ol, 6- (5-isoheptylcarbonyloxyethyl-2Hbenzotriazol-2-yl)benzo[l,3]dioxol-5-ol, 6- (5-octyloxy-2Hbenzotriazol-2-yl)benzo[l,3]dioxol-5-ol, 6—(5— methylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[1,3]dioxol5-ol, 7- (5-methyloxycarbonyl-2H-benzotriazol-2yl)benzo[1,4]dioxin-6-o1, 7-(5-butyloxycarbonyl-2Hbenzotriazol-2-yl)benzo[l,4]dioxin-6-ol, 7-(5octyloxycarbonyl-2H-benzotriazol-2-yl)benzo[1,4]dioxin-6-ol, and 7-(5-methyl-2H-benzotriazol-2-yl)benzo[1,4]dioxin-6-ol., Component (B) is preferably a compound of the above formula (1) where R2 and R3 are crosslinked to Rcn; nn / Lznz / E / YiAi form a methylenedioxy group. Specifically, component (B) is preferably 6-(5-heptylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[l,3]dioxol-5-ol, 6-(5-isoheptylcarbonyloxyethyl-2H-benzotriazol-2yl)benzo[l,3]dioxol-5-ol, 6-(5-octyloxy-2H-benzotriazol-211)benzo[1,3]dioxol-5-ol, or 6-(5-methylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol, and most preferably 6-(5-heptylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[l,3]dioxol-5-ol. The absorption coefficient of component (B) is, from the standpoint of ease of handleability and for the purpose of efficiently displaying the effect, preferably within a range of 10 to 200 (L / (g-cm)). By falling within the range, the optical material obtained by polymerizing and curing the optical material composition can exhibit the excellent effect of an ability to cut UV rays and blue light, without reducing the resistance thereof. When the mixing amount of the component (B) is 0.005 to 0.3 parts by mass relative to 100 parts by mass of the component (A), the composition can be polymerized and cured to give an optical material having an excellent effect of cutting ability against UV rays and blue light without reducing the strength of the resulting optical material. To further improve the effect, the mixing amount of the compound (B) is more preferably 0.01 to 0.2 parts by mass. The optical material composition of the present invention containing the above-mentioned component (A) and component (B) hardly precipitates UV-absorbing material and is excellent in long-term storage stability. Additives As necessary, a polymerization catalyst and a polymerization initiator may be added to the optical material composition of the present invention to polymerize and cure the composition. In addition, the optical material composition of the present invention may further contain, as other optional components within a range that does not detract from the effect, various known additives, for example, an antistatic agent, an internal release agent, an antioxidant, a discoloration inhibitor, a fluorescent dye, a pigment, a fragrance, a solvent, a leveling agent, a resin modifier, a light stabilizer, an IR absorbing material, and a visible light absorbing material.Additionally, in addition to the UV absorbing material mentioned above, any other known UV absorbing material whose maximum absorption wavelength does not lie within a range of 360 nm or more and less than 380 nm may also be added to the composition. Rcn; nn / Lznz / E / YiAi Polymerization catalyst The polymerization catalyst includes tertiary amines and corresponding inorganic and organic salts, phosphines, quaternary ammonium salts, quaternary phosphonium salts, Lewis acids, and organic sulfonic acids. Specific examples of the reaction catalyst are mentioned below. Tertiary amines: triethylamine, tripropylamine, dipropylethylamine, tributylamine, dimethylcyclohexylamine, triethylenediamine, tetramethylethylenediamine, N,N-dicyclohexylmethylamine, N,N-diisopropylethylamine, Nisopropyl-N-methylbutylamine, N-methylpiperidine, Netilpiperidine, N,N-dimethylpiperazine, N,N-diethylpiperazine, hexamethylenetetramine, N-methylmorpholine, N-ethylmorpholine, Nmethylpiperidone, N-methylpyrrolidine, N-ethylpyrrolidine, Nmethylpyrrolidone, N,N-dimethylbenzylamine, N,N-dimethylaniline, N-methyldibenzylamine, pyridine, N-methylpyrazole, 1methylimidazole, 1,2-dimethylimidazole, benzylmethylimidazole, Nmethylpyrrol, diphenylmethylamine. Fosfinas: trimetil phosphina, trietil-fosfina, tri-npropyl-fosfina, triisopropyl-fosfina, tri-n-butil-fosfina, trifenil-fosfina, tribencil-fosfina, 1,2bis(difenilphosphino)ethano, 1,2-bis(dimethylfosfino)ethano. Sales de ammonium quaternario: bromuro de Rcn; nn / Lznz / E / YiAi tetramethylamonium, tetrabutylamonium chloride, tetrabutylamonium bromide, triethylbenzylamonium chloride, cetyldimethylbenzylamonium chloride, 1-n-dodecylpyridinium chloride. Quaternary phosphonium sales: tetramethylphosphonium bromide, tetrabutylphosphonium chloride, tetrabutylphosphonium bromide, tetraphenylphosphonium bromide. Lewis acid: triphenyl aluminum, dimethyltin dichloride, dimethyltin bis(isooctylthioglycolate), dibutyltin dichloride, dibutyltin dilaurate, dibutyltin maleate, dibutyltin maleate polymer, dibutyltin diricinolate, dibutyltin bis(dodecylmercaptide), dibutyltin bis(isooctylthioglycolate), dioctyltin dichloride, dioctyltin maleate, dioctyltin maleate polymer, dioctyltin bis(butylmaleate), dioctyltin dilaurate, dioctyltin diricinolate, dioctyltin dioleate, dioctyltin di(6-hydroxy)caproate, dioctyltin bis(isooctylthioglycolate), didodecyltin diricinolate; other various metal salts, for example, copper oleate, copper acetylacetonate, iron acetylacetonate, iron naphthenate, iron lactate, iron citrate, iron gluconate, potassium octanoate, 2-ethylhexyl titanate. Organic sulfonic acids: methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid. The amount of polymerization catalyst that is Rcn; nn / Lznz / E / YiAi is suitably added in the amount of 0.001 to 1 part by mass with respect to 100 parts by mass of the total amount of component (A), preferably 0.002 to 0.5 parts by mass, more preferably 0.005 to 0.4 parts by mass. Polymerization Initiator: Without specific limitation, any known thermal polymerization initiator and photopolymerization initiator can be used as the polymerization initiator. Typical examples of polymerization initiators are listed below. Thermal polymerization initiator: diacyl peroxides such as benzoyl peroxide, p-chlorobenzoyl peroxide, decanoyl peroxide, lauroyl peroxide, and acetyl peroxide; peroxy esters such as tert-butylperoxy-2-ethylhexanoate, tert-butylperoxy neodecanoate, cumylperoxy neodecanoate, and tert-butylperoxy benzoate; percarbonates such as diisopropylperoxy dicarbonate, and di-sec-butylperoxy dicarbonate; azo compounds such as azobisisobutyronitrile. Photopolymerization initiator: benzophenone; acetophenone compounds such as 2,2-dimethoxy-l,2-diphenylethan-l-one, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-l-phenylpropan-l-one, 1-[4-(2-hydroxyethoxy)phenyl]-2-hydroxy-2-methyl-l-propan-l-one, 2-methyl-l-[4(methylthio)phenyl]-2-morpholinopropan-l-one, 2-benzyl-2 Rcn; nn / Lznz / E / YiAi dimethylamino-1-(4-morpholinophenyl)butanone-1, yl—(4- isopropylphenyl)-2-hydroxy-2-methylpropan-l-one; adicarbonyl compounds such as 1,2-diphenylethanedione, and methylphenylglyoxylate; acylphosphine oxide compounds such as 2,6-dimethylbenzoyldiphenylphosphine oxide, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, bis(2,6-dimethoxybenzoyl)-2,4,4-trimethylpentylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, methyl 2,4,6-trimethylbenzoyldiphenylphosphinate, methyl 2,6-dichlorobenzoyldiphenylphosphine, methyl 2,6-dimethoxybenzoyldiphenylphosphine; 1,2-octanedione-l-[4(phenylthio)-2-(O-benzoyloxime)]. The amount of the polymerization initiator to be added is preferably 0.01 to 0.5 parts by mass relative to 100 parts by mass of the total amount of the component (A), more preferably 0.05 to 0.4 parts by mass. Internal Release Agent The internal release agent includes a fluorine-based nonionic surfactant, a silicone-based nonionic surfactant, an alkyl quaternary ammonium salt, a phosphate, an acid phosphate, an oxaalkylene-type acid phosphate, an alkali metal salt of an acid phosphate, an alkali metal salt of an oxyalkylene-type acid phosphate, a metal salt of a higher fatty acid, a higher fatty acid ester, a paraffin, a wax, a higher aliphatic amide, a higher aliphatic alcohol, a polysiloxane, and an aliphatic ethylene oxide adduct of ethylene oxide. Examples of the acid phosphate usable herein include Zelec UN by Stepan Company; MR internal release agents by Mitsui Chemicals, Inc.; JP series by Johoku Chemical Co., Ltd.; Phosphanol Series by Toho Chemical Industry Co., Ltd.; and AP, DP series by Daihachi Chemical Industry Co., Ltd. Resin Modifier A resin modifier may be added to the optical material composition of the present invention for the purpose of controlling various properties such as optical properties, impact resistance, and specific gravity of the resin, and for controlling the viscosity and the service life of the optical material composition, within a range that does not detract from the advantageous effects of the present embodiment. For example, an episulfide compound, an alcohol compound, an amine compound, an epoxy compound, an organic acid and an anhydride thereof, and an olefin compound including a (meth)acrylate compound may be used. Visible Light Absorbing Material Without specific limitation, any compound whose maximum absorption wavelength lies within a Rcn; nn / Lznz / E / YiAi in the range of 400 nm to 750 nm can be used as the visible light absorbing material. For example, a perylene compound, a porphyrin compound, a carotenoid compound, a cyanine compound, a phthalocyanine compound, an anthraquinone compound, an indigo compound, a neodymium compound, and a tetraazaporphyrin compound can be used. Optical Material The optical material of the present invention is a cured product produced by polymerizing and curing the aforementioned optical material composition. Preferably, the optical material has a light transmittance at a wavelength of 400 nm of 5% or less and a light transmittance at a wavelength of 420 nm of 70% or less, and a light cut-off rate in a wavelength range of 380 nm to 500 nm (this may also be referred to as a blue light cut-off rate) of 35% or more. More preferably, the light transmittance of the optical material at a wavelength of 400 nm is 3% or less, even more preferably 1% or less. More preferably, the light transmittance of the optical material at a wavelength of 420 nm is 65% or less, even more preferably 60% or less. More preferably, the light cut-off rate in a wavelength range of 380 nm to 500 nm is 38% or more, even more preferably 40% or more. The light cutoff ratio over a wavelength range of 380 to 500 nm is determined as follows. At 10 nm intervals over a wavelength range of 380 nm to 500 nm, the transmittance is measured, and the data found for the transmittance at 10 nm intervals are averaged to give an average value (this may also be referred to as an average transmittance (T) value over 380 to 500 nm), and the light cutoff ratio is calculated according to the following formula. Blue light cut-off ratio = 100 - (average transmittance (T) value at 380 nm to 500 nm) Although not specifically limited in the point of use thereof, the optical material produced by polymerizing and curing the optical material composition of the present invention is favorably used as lenses of ordinary glasses, protective glasses, eye-correcting glass lenses, lenses for imaging devices, Fresnel lenses for liquid crystal projectors, reticular lenses, and contact lenses. A production method for the optical material includes mixing one or more benzotriazole-based UV absorbing materials selected from the above-mentioned formula (1) with a polymerizable monomer to give an optical material composition, and then polymerizing, curing, and molding the composition according to a known production method. Also not specifically limited, pour-molding polymerization is generally employed for the production method for plastic lenses using the optical material composition. For example, a polymerization initiator is optionally mixed with the optical material composition, and the resulting mixture liquid is poured into a lens mold and heated therein generally to a temperature ranging from -20 to 150°C to give a plastic lens. Secondary Processing of Optical Material; Lamination with the Coating Layer The optical material obtained by polymerizing and curing the optical material composition of the present invention, especially a plastic lens formed of the optical material, is, as necessary, optionally coated with a coating layer on one surface of both surfaces thereof. Specifically, the coating layer includes a primer layer, a hard coating layer, an anti-reflection layer, an anti-fog coating layer, an anti-pollution layer, and a water-repellent layer. These coating layers can be used alone, or the plural coating layers can be multiple layers for use on the same surface. In the case where the coating layer is formed on both surfaces, the same coating layer can be used. Rcn; nn / Lznz / E / YiAi can be formed on both surfaces, or different coating layers can be formed on them. In these coating layers, a known UV absorbing material, an IR absorbing material for the purpose of protecting the eyes from IR rays, a light stabilizer and an antioxidant for improving the weather resistance of the lenses, a dye and a pigment and an additional photochromic dye and a photochromic pigment for improving the fashion of the lenses, an antistatic agent, and other known additives for improving the performance of the lenses may be optionally used in combination. For the coating layer formed by the coating operation, various leveling agents may be used for the purpose of improving the coating performance. In the case where a hard coating layer is provided, a coating liquid containing an organic silicon compound or a fine particulate inorganic substance of tin oxide, silicon oxide, zirconium oxide, or titanium oxide is applied and cured to form the layer. For the purpose of improving impact resistance or improving the ability to add to the hard coating layer, a primer layer consisting mainly of a polyurethane may be provided on the surface of a plastic lens. In addition, to improve anti-reflection performance, an anti-reflection layer may be formed. Rcn; nn / Lznz / E / YiAi hard coating layer, using silicon oxide, titanium oxide, zirconium oxide, or tantalum oxide. In addition to the anti-reflection layer, a water-repellent film can be provided using an organic silicon compound containing fluorine atoms for the purpose of improving water repellency. Examples Examples are provided hereinafter to specifically describe the present invention, but the present invention is not limited to these examples. The physical properties of plastic lenses obtained by polymerizing and curing an optical material composition were determined according to the following methods. (1) Measurement of light transmittance at 400 nm and 420 nm Using a spectrophotometer (UV-2550, by Shimadzu Corporation), a transmittance was measured at a wavelength of 380 to 800 nm, and the light transmittance and luminous transmittance at the wavelength were determined. (2) Measurement of the light cutoff rate in the blue region (wavelength range 380 nm to 500 nm) Using a spectrophotometer (UV-2550, by Shimadzu Corporation), a transmittance was measured at a wavelength of 380 to 500 nm, and from the transmittance (T (%) ) at 10 nm intervals, the blue light cutoff ratio was calculated according to the following formula. rcíw nn / Lznz / E / YiAi Blue light cut-off rate (%) = 100 - (average transmittance value (T) at 380 to 500 nm) The maximum absorption wavelength of UV absorbing material was determined according to the following method. A Shimadzu UV-2550 spectrophotometer from Shimadzu Corporation was used as the measuring instrument. For the measurement, a substance to be measured was dissolved in a solvent (chloroform) to give a solution (concentration 1.0 χ 10~4 mol / L), and the solution was analyzed through a quartz cell having a light path length of 10 mm. Example 1 0.06 parts by mass of a catalyst, dimethyltin dichloride, 0.15 parts by mass of a release agent, acid phosphate JP-506H (by Johoku Chemical Co., Ltd.), and 0.04 parts by mass of a UV absorbing material, 6-(5-heptylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol (maximum absorption wavelength: 367 nm) were added to 50.28 parts by mass of bis(isocyanatomethyl)bicyclo[2.2.1]heptane, and mixed with stirring, and further, 25.50 parts by mass of pentaerythritol tetrakis(3-mercaptopropionate) and 24.22 parts by mass of 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane were added, and mixed with stirring under a reduced pressure of 10 mmHg for 30 minutes to prepare an optical material composition. The optical material composition was then cast into a previously prepared lens molding mold (center thickness 2.0 mm) composed of a glass mold and resin packing, and polymerized in an electric furnace at 20°C to 120°C for 24 hours. After polymerization, the packing and mold were removed, and the cured product was heat-treated at 120°C for 2 hours to give a plastic lens. The evaluation results of the resulting lenses are shown in Table 1. Example 2 0.04 parts by mass of a catalyst, dimethyltin dichloride, 0.15 parts by mass of a release agent, acid phosphate JP-506H (by Johoku Chemical Co., Ltd.), and 0.04 parts by mass of a UV absorbing material, 6—(5—heptylcarbonyloxyethyl-2H-benzotriazol-2yl)benzo[1,3]dioxol-5-ol (maximum absorption wavelength: 367 nm) were added to 52.02 parts by mass of xylylene diisocyanate and mixed with stirring, and further, 47.98 parts by mass of 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane were added, and mixed with stirring under a reduced pressure of 10 mmHg for 30 minutes to prepare an optical material composition. The optical material composition was then poured into a previously prepared lens molding mould (center thickness 2.0 mm). Rcn; nn / Lznz / E / YiAi was composed of a glass mold and resin packing, and polymerized in an electric furnace from 20°C to 120°C for 24 hours. After polymerization, the packing and mold were removed, and the cured product was heat-treated at 120°C for 2 hours to give a plastic lens. The evaluation results of the resulting lenses are shown in Table 1. Example 3 0.04 parts by mass of 6-(5-heptylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol (maximum absorption wavelength: 367 nm), and 90.9 parts by mass of bis(2,3-epithiopropyl) disulfide were placed in a completely dry matrix stirred at 20°C for 1 hour to prepare a solution. A solution prepared by dissolving 0.019 parts by mass of N,N-dimethylcyclohexylamine and 0.09 parts by mass of N,N-dicyclohexylmethylamine in 9.1 parts by mass of a mixture consisting mainly of 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane was added to the above solution, and stirred at 20°C for 30 minutes to give an optical material composition.The optical material composition was defoamed under 600 Pa for 1 hour, then filtered through a 1-pm PTFE filter, and then the resulting optical material composition was cast into a previously prepared lens molding mold (center thickness 2.0 mm) composed of a glass mold and resin packing. The glass mold was polymerized at 30°C to 80°C over a period of 21 hours. After polymerization, the packing and mold were removed, and the cured product was heat-treated at 120°C for 3 hours to give a plastic lens. The evaluation results of the resulting lenses are shown in Table 1. Example 4 90.00 parts by mass of methyl methacrylate, 10.00 parts by mass of ethylene glycol dimethacrylate, 0.04 parts by mass of a UV absorbing material, 6—(5—heptylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[1,3]dioxol5-ol (maximum absorption wavelength: 367 nm) and 0.10 parts by mass of a thermal polymerization initiator, azobisisobutyronitrile were mixed, stirred at room temperature, and then degassed under a reduced pressure of 50 mmHg for 10 minutes to give an optical material composition. The optical material composition was then cast into a previously prepared lens mold (center thickness 2.0 mm) composed of a glass mold and a resin gasket, and polymerized in an electric furnace at 40°C to 85°C over a period of 24 hours. After polymerization, the gasket and mold were removed, and the cured product was heat-treated at 100°C for 2 hours to give a plastic lens.The evaluation results of the resulting lenses are shown in Table 1. Examples 5 to 8 Plastic lenses were produced in the same manner as in Examples 1 to 4, except that in Examples 1 to 4, the amount of the UV absorbing material added was changed as in Table 1. The evaluation results of the resulting lenses are shown in Table 1. In the optical material composition produced in Examples 1 to 8, precipitation of the UV-absorbing material was not confirmed within 24 hours at room temperature (25°C), and these compositions were excellent in long-term storage stability. Comparative Examples 1 and 2 Plastic lenses were produced in the same manner as in Examples 1 and 5, except that the UV-absorbing material was changed to 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chloro-2H-benzotriazole (maximum absorption wavelength: 352 nm). The evaluation results of the resulting lenses are shown in Table 1. Table 1 Polymerizable monomer (A) UV absorbing material (B) (part by mass) Transmittance (%) Blue light cut-off rate (%) 400 nm 42 0 nm Example 1 Al, A2, A3 B1 (0.04) 1 54 40 Example 2 A4 , A3 B1 (0.04) 0 50 42 Example 3 A5 r A6 B1 (0.04) 0 15 44 Example 4 A7, A8 B1 (0.04) 1 57 39 Example 5 Al, A2, A3 B1 (0.06) 0 44 43 Example 6 A4 , A3 B1 (0.06) 0 38 44 Example 7 A5, A 6 B1 (0.06) 0 11 46 Example 8 A7, A8 B1 (0.1) 0 30 44 Comparative example 1 Al, A2, A3 B2 (0.04) 8 83 32 Comparative example 2 Al, A2, A3 B2 (0.06) 6 81 33 The polymerizable he monomer (A) and the material Rcn; nn / Lznz / E / YiA UV absorber (B) in Table are as follows. Polymerizable monomer Al: Bis(isocyanatomethyl)bicyclo[2.2.1]heptane A2: Pentaerythritol tetrakis(3-mercaptopropionate) A3: 1,2-Bis(2-mercaptoethylthio)-3-mercaptopropane A4: Xylylene diisocyanate A5: Bis(2,3-epithiopropyl) disulfide A6: Mixture consisting primarily of 5,7-dimercaptomethyl-1,1l-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,1l-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,1l-dimercapto-3,6,9-trithiaundecane, A7: Methyl methacrylate A8: Ethylene glycol dimethacrylate (UV Absorbing Material) B1: 6-(5-Heptylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[l,3]dioxol-5-ol B2: 2-(3-Terti-butyl-2-hydroxy-5-methylphenyl)-5-chloro- 2H-benzotriazole The results in the Examples and the Examples Comparatives verify the following. In Examples 1 to 8, all the lenses cut UV rays and blue light that are harmful to the eyes, and are effective in preventing blue light hazards. As opposed to these, the lenses in Comparative Examples 1 and 2 have a high transmittance at 420 nm and a low blue light cut-off rate, and it is known that, when a UV-absorbing material not within the range of the present invention is used, the blue light cut-off performance is insufficient. It is noted that as of this date, the best method known to the applicant for putting the present invention into practice is the one that is clear from the present description of the invention.

Claims

Having described the invention as above, the following claims are claimed as property:

1. An optical material composition, characterized in that it comprises: (A) 100 parts by mass of a polymerizable monomer, and (B) 0.001 to 0.3 parts by mass of a UV-absorbing material having a maximum absorption wavelength of 360 nm or more and less than 380 nm and is represented by the following formula (1): ho Rcn;nn / Lznz / E / YiAi where R1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a hydroxy group, a linear or branched monosubstituted amino group having 1 to 4 carbon atoms, a linear or branched disubstituted amino group having 1 to 4 carbon atoms, a nitro group, a carboxy group, an alkyloxycarbonyl group in which the alkyl group has 1 to 8 carbon atoms, in which the hydroxyalkyl group has 1 to 8 carbon atoms, an alkylcarbonyloxyalkyl group in which the alkyl groups each have 1 to 8 carbon atoms, a carboxyalkyl group in which the alkyl group has 1 to 3 carbon atoms, an alkyloxycarbonylalkyl group in which the alkyl groups have 2 to 10 total carbon atoms, an aryl group, an acyl group, a sulfo group or a cyano group;R2 represents a hydroxy group, an alkoxy group having 1 to 8 carbon atoms, an alkylthio group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, or a linear or branched disubstituted amino group having 1 to 4 carbon atoms; R3 represents a hydrogen atom, a hydroxy group, an alkyl group or an alkoxy group having 1 to 8 carbon atoms, a linear or branched mono-substituted amino group having 1 to 4 carbon atoms, or a linear or branched disubstituted amino group having 1 to 4 carbon atoms; and R2 and R3 can crosslink to form a cyclic structure.

2. The optical material composition according to claim 1, characterized in that the polymerizable monomer (A) contains at least one polyisocyanate compound selected from bis(isocyanatomethyl)bicyclo[2.2.1]heptane, xylylene diisocyanate, diphenylmethane diisocyanate and tolylene diisocyanate, and at least one polythiol compound selected from pentaerythritol tetrakis(3-mercaptopropionate) and 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane.

3. The optical material composition according to claim 1, characterized in that the polymerizable monomer (A) contains bis(2,3-epitiopropyl) disulfide, and a mixture consisting mainly of 5,7dimercaptomethyl-1,11-dimercapto-3,6,9-tritiaundecane, 4,7dimercaptomethyl-1,11-dimercapto-3,6,9-tritiaundecane and 4,8dimercaptomethyl-1,11-dimercapto-3,6,9-tritiaundecane.

4. An optical material, characterized in that it is formed from a cured product produced by polymerizing and curing the optical material composition according to any one of claims 1 to 3, having a light transmittance at a wavelength of 400 nm of 5% or less, a light transmittance at a wavelength of 420 nm of 70% or less, and a light cutoff rate in a wavelength range of 380 to 500 nm of 35% or more.

5. A plastic lens characterized in that it is formed from the optical material according to claim 4.