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Composition for optical material

A technology of optical materials and compositions, applied in optics, optical components, instruments, etc., can solve problems such as uneven polymerization, and achieve the effect of suppressing uneven polymerization

Active Publication Date: 2013-09-04
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the polymerization curing of compositions containing these compounds sometimes leads to the occurrence of non-uniform polymerization called streaks

Method used

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  • Composition for optical material

Examples

Experimental program
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specific example

[0058]Preferable examples of the ultraviolet absorber include benzotriazole compounds. Specific examples of particularly preferred compounds include: 2-(2-hydroxy-5-methylphenyl)-2H-benzotriazole, 5-chloro-2-(3,5-di-tert-butyl-2-hydroxy Phenyl)-2H-benzotriazole, 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chloro-2H-benzotriazole, 2-(3,5- Di-tert-amyl-2-hydroxyphenyl)-2H-benzotriazole, 2-(3,5-di-tert-butyl-2-hydroxyphenyl)-2H-benzotriazole, 2-(2- Hydroxy-4-octyloxyphenyl)-2H-benzotriazole and 2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole. Preferable examples of the bluing agent include anthraquinone compounds.

[0059] In addition, when the composition for optical materials of the present invention is difficult to take out from the mold, known external and / or internal mold release agents may be used or added to improve the mold release properties of the resulting cured material. Examples of the release agent include: nonionic fluorine-based surfactants, nonionic silicon-...

Embodiment 1

[0082] The curing was performed by polymerization method A using a polymerization catalyst comprising 99.6% by mass of dibutyltin dichloride and 0.4% by mass of monobutyltin trichloride. The observed results were rated as excellent streak suppression. The evaluated results are shown in Table 1.

Embodiment 2 to 4

[0084] Curing was performed by the polymerization method shown in Table 1 using a polymerization catalyst containing 99.6% by mass of dibutyltin dichloride and 0.4% by mass of monobutyltin trichloride. The evaluated results are shown in Table 1.

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Abstract

The present invention pertains to a composition for an optical material, wherein the occurrence of polymerization unevenness called striae has been suppressed, particularly striae that occur in high-powered lenses with sharp curves. Specifically, the composition for an optical material includes: a polymerization catalyst with a mass ratio between dibutyltin dichloride and monobutyltin trichloride of 97.0 / 3.0-100.0 / 0.0; a polythiol compound; and a polyiso(thio)cyanate compound.

Description

technical field [0001] The present invention relates to compositions and the like for optical materials, and more particularly to optical materials suitable for use as optical materials (such as plastic lenses, prisms, optical fibers, information recording substrates, and optical filters) and particularly suitable for use as plastic lenses With composition etc. Specifically, the present invention relates to an optical material having good optical properties and prepared from a polyurethane-based resin by polymerization of a polymerizable composition comprising a polythiol compound and a polyiso(thio)cyanate compound. The response is obtained. Background technique [0002] Optical materials made of resin are lightweight and less prone to damage than optical materials made of inorganic materials, and can be dyed. Therefore, it has been rapidly applied to various optical materials such as spectacle lenses and camera lenses in recent years. [0003] Higher performance is requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/24G02B1/04
CPCG02B1/04C08G18/242C08G18/3876C08L75/04C08L81/00C08G18/24C08G18/52C08L75/00C08G75/00
Inventor 竹村纮平堀越裕
Owner MITSUBISHI GAS CHEM CO INC
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