JP3527926B2 - Composition for optical material, organic glass for optical material, and method for producing the organic glass - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for optical materials, an organic glass for optical materials, and a method for producing the organic glass. More specifically, it can be used as a lens material for spectacles and other optical materials. The present invention relates to a material which gives an organic glass suitable as an optical material having a relatively low specific gravity and a high refractive index and excellent impact resistance.

[0002]

2. Description of the Related Art Conventionally, since organic glass is lighter than inorganic glass, it is made of a polymer such as diethylene glycol bis (allyl carbonate) (hereinafter abbreviated as "CR-39") or methyl methacrylate. Organic glass is used. However, the refractive index of these organic glasses is 1.49 to 1.50, which is lower than that of inorganic glass (1.523 in the case of white crown glass), and it is thicker than that of inorganic glass, and the merit of weight reduction is impaired. In addition, when used as a lens for correcting visual acuity, there is a drawback that the appearance becomes worse as the degree increases. Therefore, the development of organic lenses with high refractive index has been carried out,
In order to obtain a high refractive index plastic, it is common to introduce a halogen atom other than fluorine and a sulfur atom into the molecular structure.

[0003]

However, these methods have a drawback that the specific gravity becomes heavy when a halogen atom is introduced, and when a sulfur atom is introduced, an odor peculiar to sulfur is generated during cutting. There was a drawback to do. The object of the present invention is to solve the above-mentioned drawbacks of the conventional organic glass, and is suitable as an optical material having a relatively low specific gravity and a high refractive index and excellent impact resistance without using a halogen element or a sulfur compound. It is about developing materials that give organic glass.

[0004]

Means for Solving the Problems As a result of intensive studies in view of the above facts, the present inventors have found that a specific allyl-based monomer or allyl-based oligomer is used as an essential component without using a halogen element or a sulfur compound. It has been found that the above-mentioned problems can be solved by copolymerizing a composition for an optical material prepared in combination and having a specific viscosity and curing the composition, and finally the present invention has been completed.

The component (I) of the present invention contains the following components (a) and (b) and has a viscosity at 30 ° C. of 20 cP or more.
A composition for optical materials, which is in the range of 8000 cP. (A) Allyl 2-phenylbenzoate (hereinafter referred to as "2-PB
Also referred to as "AA". ), Allyl 3-phenylbenzoate (hereinafter also referred to as “3-PBAA”) and / or allyl 4-phenylbenzoate (hereinafter also referred to as “4-PBAA”).

(B) Diallyl phthalate monomer (hereinafter also referred to as "DAP"), diallyl isophthalate monomer (hereinafter also referred to as "DAIP"), diallyl terephthalate monomer (hereinafter also referred to as "DATP"), diallyl Adipate monomer, triallyl isocyanurate monomer, triallyl trimellitate monomer, 1,2-cyclohexanedicarboxylic acid diallyl,
1,3-Cyclohexanedicarboxylic acid diallyl, 1,4
At least one compound selected from the group consisting of diallyl cyclohexanedicarboxylate, diethylene glycol diallyl carbonate, diallyl phthalate prepolymer

Diallyl phthalate prepolymer (DAP
Prepolymer, DAIP prepolymer and / or DAT
Although low molecular weight raw material monomers remain in the P prepolymer), these residual monomers can be used as they are without separation, and therefore, for the optical materials of the present invention (I) to the present invention (IV). Prepolymers containing these residual monomers are also treated as diallyl phthalate prepolymers in the composition.

(II) of the present invention comprises the following component (a):
A composition for an optical material, which comprises the component (b) and the component (c) and has a viscosity at 30 ° C. of 20 cP to 8000 cP. (A) Allyl 2-phenylbenzoate, allyl 3-phenylbenzoate and / or allyl 4-phenylbenzoate

(B) Diallyl phthalate monomer, diallyl isophthalate monomer, diallyl terephthalate monomer, diallyl adipate monomer, triallyl isocyanurate monomer, triallyl trimellitate monomer, 1,2-cyclohexanediallylic acid diallyl, 1,3-cyclohexane Diallyl dicarboxylate,
At least one compound selected from the group consisting of diallyl 1,4-cyclohexanedicarboxylate, diethylene glycol diallyl carbonate and diallyl phthalate prepolymer

(C) An oligomer having an allyl ester group at the terminal and having the following repeating units: CH ₂ = CHCH ₂ O {COACOOBO} n COACOOCH ₂ CH = CH ₂ (where A has 1 to 20 carbon atoms) Represents a divalent organic residue, B represents a divalent organic residue derived from a diol having 2 to 20 carbon atoms, and n is a number of 1 to 20.)

(III) of the present invention is characterized by containing the following components (a), (b) and (d) and having a viscosity at 30 ° C. in the range of 20 cP to 8000 cP. It is a composition for optical materials. (A) Allyl 2-phenylbenzoate, allyl 3-phenylbenzoate and / or allyl 4-phenylbenzoate

(B) Diallyl phthalate monomer, diallyl isophthalate monomer, diallyl terephthalate monomer, diallyl adipate monomer, triallyl isocyanurate monomer, triallyl trimellitate monomer, 1,2-cyclohexanedicarboxylic acid diallyl, 1,3-cyclohexane Diallyl dicarboxylate,
At least one compound selected from the group consisting of diallyl 1,4-cyclohexanedicarboxylate, diethylene glycol diallyl carbonate and diallyl phthalate prepolymer

(D) Vinyl benzoate, allyl benzoate,
Phenyl (meth) acrylate and / or benzyl (meth) acrylate

The component (IV) of the present invention is the following component (a):
A composition for an optical material, which comprises the component (b), the component (c) and the component (d) and has a viscosity at 30 ° C. of 20 cP to 8000 cP. (A) Allyl 2-phenylbenzoate, allyl 3-phenylbenzoate and / or allyl 4-phenylbenzoate

(B) Diallyl phthalate monomer, diallyl isophthalate monomer, diallyl terephthalate monomer, diallyl adipate monomer, triallyl isocyanurate monomer, triallyl trimellitate monomer, 1,2-cyclohexanedicarboxylic acid diallyl, 1,3-cyclohexane Diallyl dicarboxylate,
At least one compound selected from the group consisting of diallyl 1,4-cyclohexanedicarboxylate, diethylene glycol diallyl carbonate and diallyl phthalate prepolymer

(C) An oligomer having an allyl ester group at the terminal and having the following repeating units CH ₂ = CHCH ₂ O {COACOOBO} n COACOOCH ₂ CH = CH ₂ (where A has 1 to 20 carbon atoms) Represents a divalent organic residue, B represents a divalent organic residue derived from a diol having 2 to 20 carbon atoms, n is a number of 1 to 20.) (d) vinyl benzoate, Allyl benzoate, phenyl (meth) acrylate and / or benzyl (meth) acrylate

The present invention (V) is an organic glass for an optical material obtained by curing the composition for an optical material according to any one of the present inventions (I) to (IV).

Further, the present invention (VI) is a method for producing the organic glass for optical materials of the present invention (V).

The present invention will be described below. The amount of 2-PBAA, 3-PBAA, and / or 4-PBAA as the component (a) in the compositions for optical materials of the present invention (I) to the present invention (IV) is set so as to increase the refractive index. It is desirable to use many, but if used too much, since it has only one allyl group, heat resistance,
A problem occurs that the solvent resistance becomes poor. Therefore, as the blending amount of these, the composition for optical material 10 containing each component is used.
5 to 60 parts by weight, more preferably 1 to 0 parts by weight
It is desirable to include 0 to 50 parts by mass.

DAP, DAIP, DA of the component (b) in the compositions for optical materials of the present inventions (I) to (IV).
TP, diallyl adipate monomer, triallyl isocyanurate monomer, triallyl trimellitate monomer, diallyl 1,2-cyclohexanedicarboxylate,
1,3-Cyclohexanedicarboxylic acid diallyl, 1,4
-As the compounding amount of diallyl cyclohexanedicarboxylate, diethylene glycol diallyl carbonate, diallyl phthalate prepolymer is too small,
The heat resistance and the solvent resistance are impaired, and when the amount is too much, the problem that the impact resistance is significantly deteriorated occurs.
Therefore, as the blending amount of these, the raw material 10 containing each component
It is desirable to contain 10 parts by mass to 90 parts by mass, more preferably 20 parts by mass to 80 parts by mass in 0 parts by mass.

In these components (b), diallyl adipate monomer, diallyl 1,2-cyclohexanedicarboxylate, diallyl 1,3-cyclohexanedicarboxylate, diallyl 1,4-cyclohexanedicarboxylate and diethylene glycol diallyl carbonate are Although it exhibits preferable performance with respect to impact resistance, it causes the problem that the refractive index is remarkably lowered, so that the amount of these used is preferably 20% by mass or less of the diallyl monomer.

The allyl ester oligomer of the component (c) in the composition for optical materials of the present invention (II) or the present invention (IV) is specifically an allyl ester as described in JP-A-2-251509. It can be synthesized from an alcohol, a lower ester of a saturated polycarboxylic acid and a polyhydric alcohol.

Raw materials for the composition for optical materials include lower esters of aromatic dicarboxylic acids such as dimethyl terephthalate and dimethyl isophthalate, and propylene glycol, 1,3-butanediol and 2-methyl-1,3-propanediol. It is preferable to combine a diol such as 1,6-hexanediol with a raw material for synthesis in order to adjust the viscosity described later.

Further, it is preferable to use an ethylene oxide 2 mol adduct of bisphenol-A, an ethylene oxide 3 mol adduct of bisphenol-A, or a propylene oxide 2 mol adduct of bisphenol-A for increasing the refractive index. .

In the composition for optical materials of the present invention, the organic glass for optical materials having a high refractive index can be obtained by curing the composition without adding the allyl ester oligomer as the component (c).

However, by adding the component (c), the impact resistance of the obtained organic glass for optical materials can be improved. However, if the blending amount is too large, the viscosity becomes too high, and cast polymerization generally used as a method for producing an organic glass for optical materials cannot be performed. Therefore, it is desirable to select the compounding amount of the component (c) from 60 parts by mass or less, more preferably from 20 parts by mass to 60 parts by mass in 100 parts by mass of the raw material containing each component.

Further, when the allyl ester oligomer as the component (c) is synthesized, the corresponding diallyl monomer is by-produced, so that the polyallyl allyl ester monomer may be added in the state of being mixed as it is or if necessary. Thus, the desired concentration of the above-mentioned monomers can be obtained.
Furthermore, in order to further improve impact resistance when the polyvalent allyl ester monomer concentration is high, and on the contrary, when the allyl ester oligomer concentration is high, the composition for optical materials of the present invention is used for the purpose of lowering the viscosity. It is also possible to combine a monofunctional polymerizable monomer having a benzene ring having excellent copolymerizability with an allyl group as the component (d).

Here, the two items that are copolymerizable with an allyl group and have a benzene ring are important factors. For example, when a monomer having a benzene ring such as styrene but having a poor copolymerizability with an allyl group is used, the cured product becomes cloudy, which hinders its use as an optical material. Further, although it has good copolymerizability with an allyl group such as vinyl acetate and methyl methacrylate, when a monomer having no benzene ring is used, the refractive index is too low to solve the above problems. .

That is, the present invention (III) or the present invention (I
Specific examples of the component (d) of the optical material composition V) include vinyl benzoate, allyl benzoate, phenyl (meth) acrylate, and benzyl (meth) acrylate. These may be used alone or in combination of two or more.

The compounding amount of the component (d) in the optical material composition of the present invention (III) or the present invention (IV) is as follows:
If too much is used, heat resistance and solvent resistance are impaired, so it is desirable to select from the range of 30% by mass or less, more preferably 20% by mass or less of the composition for optical materials containing each component.

In the compositions for optical materials of the present inventions (I) to (IV), not only the simple mass ratio of the respective components but also the viscosity and the refractive index after the respective components are blended are important factors. Is. That is, if the viscosity after compounding is too high, it is impossible to carry out the casting polymerization generally performed with CR-39, and if it is too low, the viscosity is increased by prepolymerization before casting. The operation becomes necessary.

Therefore, the viscosity of each component of the compositions for optical materials of the present invention (I) to (IV) after blending is such that each component is within the above mass ratio range and 20 cP at 30 ° C. Within the range of up to 8000 cP, more preferably 50
It is desirable to adjust the composition for optical materials so that it falls within the range of cP to 1000 cP.

A radical curing agent is added to the optical material composition of the present invention. As this curing agent, it is possible to use any radical polymerization initiator as long as it can generate radicals by heat, microwaves, infrared rays, or ultraviolet rays, use of the curable compound, purpose, compounding ratio of components. It can be appropriately selected depending on the curing method of the curable compound and the like.

However, in practice, diisopropyl peroxydicarbonate (hereinafter abbreviated as "IPP"), di-n-propyl peroxydicarbonate, di-sec, as in the polymerization of CR-39. -Percarbonates such as butyl peroxydicarbonate are used in an amount of 1 part by mass to 10 parts by mass with respect to the curable composition, and the organic lens is cured by a cast polymerization method in a temperature range of 30 ° C to 100 ° C. Obtaining is preferable because it is not necessary to change the current production line of organic glass.

[0035]

EXAMPLES The present invention will now be described in detail with reference to examples, but the present invention is not limited to these examples. (Synthesis example of allyl ester oligomer)

Reference Example-1 A 1 liter three-necked flask equipped with a distillation apparatus was charged with DATP.
600 g, propylene glycol 123.6 g, and dibutyltin oxide 0.3 g were charged to make 18
The mixture was heated to 0 ° C., and the produced allyl alcohol was distilled off. When about 120 g of allyl alcohol was distilled, the pressure inside the reaction system was reduced to 50 mmHg to accelerate the distillation rate of allyl alcohol. After distilling the theoretical amount of allyl alcohol, heating was continued for another hour. After that, the pressure was reduced, and the residual allyl alcohol was distilled off to obtain 506 g of a polymerizable oligomer. This is hereinafter referred to as "allyl ester oligomer-A".

Reference Example 2 A 1 liter three-necked flask equipped with a distillation device was charged with DATP.
600 g, 1,3-butanediol 109.8 g, and dibutyltin oxide 0.3 g were charged, and 1 was added under a nitrogen stream.
The mixture was heated to 80 ° C., and the produced allyl alcohol was distilled off. When about 100 g of allyl alcohol was distilled, the pressure inside the reaction system was reduced to 50 mmHg to accelerate the distillation rate of allyl alcohol. After the theoretical amount of allyl alcohol had been distilled off, heating was continued for another hour. After that, the pressure was reduced and the residual allyl alcohol was distilled off to obtain 570 g of a polymerizable oligomer. This is hereinafter referred to as "allyl ester oligomer-B".

Reference Example 3 DAIP was placed in a 1-liter three-necked flask equipped with a distillation apparatus.
600 g, propylene glycol 92.7 g, and dibutyltin oxide 0.3 g were charged to 180 under a nitrogen stream.
The resulting allyl alcohol was distilled off by heating to ℃. When about 100 g of allyl alcohol was distilled, the pressure inside the reaction system was reduced to 50 mmHg to accelerate the distillation rate of allyl alcohol. After the theoretical amount of allyl alcohol was distilled off, heating was continued for another hour. After that, the pressure was reduced and the residual allyl alcohol was distilled off to obtain 523 g of a polymerizable oligomer. This is hereinafter referred to as "allyl ester oligomer-C".

Reference Example 4 DATP was placed in a 1-liter three-necked flask equipped with a distillation apparatus.
540 g, diallyl adipate 55.1 g, propylene glycol 123.6 g, dibutyltin oxide 0.
3 g was charged and heated to 180 ° C. under a nitrogen stream to distill off the produced allyl alcohol. When about 120 g of allyl alcohol was distilled, the reaction system was heated to 50 mm.
The pressure was reduced to Hg to accelerate the distillation rate of allyl alcohol. Heating was continued for another hour after the theoretical amount of allyl alcohol had distilled off. After that, the pressure was reduced and the residual allyl alcohol was distilled off to obtain 498 g of a polymerizable oligomer. This is hereinafter referred to as "allyl ester oligomer-D".

Reference Example 5 DATP was placed in a 2-liter three-necked flask equipped with a distillation apparatus.
1000 g, 1,3-butanediol 91.5 g, light polyol BP-200S (Kyoeisha Yushi Co., Ltd. bisphenol-A propylene oxide 2 mol adduct) 349.7 g, and dibutyltin oxide 0.5 g were charged, and a nitrogen stream was charged. The mixture was heated to 180 ° C. below, and the produced allyl alcohol was distilled off. Allyl alcohol is 166
When about g was distilled, the pressure inside the reaction system was reduced to 50 mmHg to accelerate the distillation rate of allyl alcohol. Heating was continued for another hour after the theoretical amount of allyl alcohol had distilled off. After that, the pressure was reduced and the residual allyl alcohol was distilled off to obtain 1186 g of a polymerizable oligomer. This is hereinafter referred to as "allyl ester oligomer-E".

Reference Example 6 DATP was placed in a 2-liter three-necked flask equipped with a distillation apparatus.
1000 g, Newcol-1900 (Shin Nakamura Chemical Co., Ltd. bisphenol-A ethylene oxide 2
Molar adduct) 642.4 g, dibutyltin oxide 0.
5 g was charged and heated to 180 ° C. under a nitrogen stream to distill off the produced allyl alcohol. When about 166 g of allyl alcohol was distilled, the reaction system was heated to 50 mm.
The pressure was reduced to Hg to accelerate the distillation rate of allyl alcohol. After the theoretical amount of allyl alcohol had been distilled off, heating was continued for another hour. After that, the pressure was reduced and the residual allyl alcohol was distilled off to obtain 1350 g of a polymerizable oligomer. This is hereinafter referred to as "allyl ester oligomer-F".

The analytical values of these allyl ester oligomers are shown in Table 1. Hereinafter, this polymerizable oligomer was used in the examples.

[0043]

[Table 1]

(Examples 1 to 20) Compositions for polymerization were prepared with the compositions shown in Tables 2 and 3, and the viscosity was measured. IPP was further mixed with this mixture in the amounts shown in Tables 2 and 3 and the temperature was raised from 40 ° C to 100 ° C over 16 hours by cast polymerization using a cellophane-clad glass plate to obtain an organic glass. A molded product was obtained. Physical properties of each example are shown in Tables 2 and 3.

(Comparative Examples 1 to 3) A composition for polymerization having the composition shown in Table 3 was prepared and the viscosity was measured. Next, IPP was further mixed with this mixture in an amount shown in Table 3 and an organic glass molded article was obtained by cast polymerization in the same manner as in Examples. Table 3 shows the physical properties.

Various physical properties were measured by the following test methods. 1. The transmittance was measured according to ASTM D-1003. 2. Refractive index and Abbe number Measured using an Abbe refractometer (manufactured by Atago). 3. Surface hardness (pencil hardness) According to JISK-5400, it is carried out with a load of 1 kgf,
The highest pencil hardness without scratches is shown. 4. Viscosity (30 ° C.) According to JISK-7117, a Brookfield type single-cylinder rotary viscometer was used, and the viscosity was measured by S method at a measurement temperature of 30 ° C.

[0047]

[Table 2]

[0048]

[Table 3]

[0049]

The organic glass for optical materials of the present invention comprises a composition for optical materials prepared by combining specific allylic monomers, allylic oligomers and the like as essential components and having a specific viscosity. It can be produced by curing by cast polymerization without changing the current production line of organic glass. According to the present invention, an organic glass, which does not use a halogen element or a sulfur compound, has a relatively low specific gravity and a high refractive index as compared with conventional organic glass, and is suitable as an optical material having excellent impact resistance. The present invention can be used not only in spectacle lenses but also in fields such as prisms and optical discs where optical properties are important, so its industrial utility value is enormous.

Continuation of front page (51) Int.Cl. ⁷ Identification code FI C08F 290/12 C08F 290/12 G02B 1/04 G02B 1/04 (72) Inventor Toru Takahashi Oita City, Oita Prefecture Nakanosu 2 Showa Denko KK (56) References JP-A-7-33834 (JP, A) JP-A-5-331272 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C08F 218 / 12 C08F 218/00 C08F 218/16 C08F 220/30 C08F 290/06 C08F 290/12 G02B 1/04 CAPLUS (STN) REGISTRY (STN)

Claims (14)

(57) [Claims] 1. A composition for optical materials, which comprises the following components (a) and (b) and has a viscosity at 30 ° C. in the range of 20 cP to 8000 cP. (A) Allyl 2-phenylbenzoate, Allyl 3-phenylbenzoate and / or Allyl 4-phenylbenzoate (b) Diallyl phthalate monomer, diallyl isophthalate monomer, diallyl terephthalate monomer, diallyl adipate monomer, triallyl isocyanurate monomer , Triallyl trimellitate monomer, 1,
2-cyclohexanedicarboxylic acid diallyl, 1,3-cyclohexanedicarboxylic acid diallyl, 1,4-cyclohexanedicarboxylic acid diallyl, diethylene glycol diallyl carbonate, at least one compound selected from the group consisting of diallyl phthalate prepolymers 2. A composition comprising the following components (a), (b) and (c) and having a viscosity at 30 ° C. of 20 cP or more:
A composition for optical materials, which is in the range of 8000 cP. (A) Allyl 2-phenylbenzoate, Allyl 3-phenylbenzoate and / or Allyl 4-phenylbenzoate (b) Diallyl phthalate monomer, diallyl isophthalate monomer, diallyl terephthalate monomer, diallyl adipate monomer, triallyl isocyanurate monomer , Triallyl trimellitate monomer, 1,
2-cyclohexanedicarboxylic acid diallyl, 1,3-cyclohexanedicarboxylic acid diallyl, 1,4-cyclohexanedicarboxylic acid diallyl, diethylene glycol diallyl carbonate, at least one compound selected from the group consisting of diallyl phthalate prepolymer (c) at the terminal An oligomer having an allyl ester group and having the following repeating units CH ₂ = CHCH ₂ O {COACOOBO} n COACOOCH ₂ CH = CH ₂ (where A is a divalent organic residue having 1 to 20 carbon atoms) , B represents a divalent organic residue derived from a diol having 2 to 20 carbon atoms, and n is a number from 1 to 20.) 3. A composition comprising the following components (a), (b) and (d) and having a viscosity at 30 ° C. of 20 cP or more:
A composition for optical materials, which is in the range of 8000 cP. (A) Allyl 2-phenylbenzoate, Allyl 3-phenylbenzoate and / or Allyl 4-phenylbenzoate (b) Diallyl phthalate monomer, diallyl isophthalate monomer, diallyl terephthalate monomer, diallyl adipate monomer, triallyl isocyanurate monomer , Triallyl trimellitate monomer, 1,
2-cyclohexanedicarboxylic acid diallyl, 1,3-cyclohexanedicarboxylic acid diallyl, 1,4-cyclohexanedicarboxylic acid diallyl, diethylene glycol diallyl carbonate, at least one compound selected from the group consisting of diallyl phthalate prepolymer (d) benzoic acid Vinyl, allyl benzoate, phenyl (meth) acrylate and / or benzyl (meth) acrylate 4. The following components (a), (b) and (c):
Containing the component and the component (d) and having a viscosity at 30 ° C. of 2
A composition for an optical material, which is in the range of 0 cP to 8000 cP. (A) Allyl 2-phenylbenzoate, Allyl 3-phenylbenzoate and / or Allyl 4-phenylbenzoate (b) Diallyl phthalate monomer, diallyl isophthalate monomer, diallyl terephthalate monomer, diallyl adipate monomer, triallyl isocyanurate monomer , Triallyl trimellitate monomer, 1,
At least one compound (c) selected from the group consisting of diallyl 2-cyclohexanedicarboxylate, diallyl 1,3-cyclohexanedicarboxylate, diallyl 1,4-cyclohexanedicarboxylate, diethylene glycol diallyl carbonate and diallyl phthalate prepolymer (c) An oligomer having an allyl ester group and having the following repeating units CH ₂ = CHCH ₂ O {COACOOBO} n COACOOCH ₂ CH = CH ₂ (where A is a divalent organic residue having 1 to 20 carbon atoms) And B represents a divalent organic residue derived from a diol having 2 to 20 carbon atoms, n is a number of 1 to 20.) (d) Vinyl benzoate, allyl benzoate, phenyl (meth) Acrylate and / or benzyl (meth) acrylate 5. The optical material according to claim 2, wherein the compounding amount of the component (c) in 100 parts by mass of the composition for optical materials is 60 parts by mass or less. Composition. 6. The composition for optical materials according to claim 3, wherein the compounding amount of the component (d) in the composition for optical materials is 30% by mass or less. 7. The compounding amount of the component (c) in 100 parts by mass of the optical material composition is 60 parts by mass or less, and the compounding amount of the component (d) in the optical material composition is 30% by mass or less. The composition for optical materials according to claim 4, wherein 8. The composition according to claim 1, wherein the compounding amount of the component (a) in 100 parts by mass of the composition for optical materials is in the range of 5 parts by mass to 60 parts by mass. A composition for an optical material as described above. 9. The compounding amount of the component (b) in 100 parts by mass of the composition for optical materials is in the range of 10 parts by mass to 50 parts by mass, according to any one of claims 1 to 8. A composition for an optical material as described above. 10. The composition for optical materials according to claim 1, further comprising a radical polymerization initiator. 11. The radical polymerization initiator is at least one selected from the group consisting of diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate and di-sec-butyl peroxydicarbonate. The composition for optical materials according to claim 10. 12. The composition for an optical material according to claim 10, wherein the content of the radical polymerization initiator is in the range of 1 part by mass to 10 parts by mass. 13. An organic glass for an optical material, which is obtained by curing the composition for an optical material according to any one of claims 1 to 12. 14. The organic glass for optical materials according to claim 13, wherein the method for producing the organic glass is 30 ° C. to 1 ° C.
A method for producing an organic glass for an optical material, which is a cast polymerization method in the range of 00 ° C.