Polymerizable composition for optical material, optical material, and production method for optical material

A technology for polymerizable compositions and optical materials, applied in the directions of optics, optical components, optical components, etc., to achieve the effects of excellent mold release, excellent manufacturing stability, and rib suppression

Active Publication Date: 2019-06-18
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, for these organotin-based catalysts, problems have been pointed out in terms of toxicity in recent years.

Method used

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  • Polymerizable composition for optical material, optical material, and production method for optical material
  • Polymerizable composition for optical material, optical material, and production method for optical material
  • Polymerizable composition for optical material, optical material, and production method for optical material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0228] Into the three-necked bottle of 2000ml, charge 2,5-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, 2,6-bis(isocyanatomethyl)bicyclo-[2.2.1]- 54.3 parts by weight of heptane, 0.05 parts by weight of 2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole (BIOSORB 583), and 0.08 parts by weight of ZelecUN were made under a nitrogen atmosphere at 20°C. After completely dissolving, 0.06 parts by weight of β-picoline (pKa value=5.82) was added and stirred for 10 minutes until all of the mixture was dissolved. Next, 45.7 parts by weight of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane was added, moved to a bath at 10°C, stirred and mixed for 10 minutes, and then further heated at 0.20kPa Degassing was carried out under reduced pressure for 30 minutes to obtain a polymerizable composition.

[0229] A glass mold (upper mold) with 6 curved surfaces (upper mold) with a diameter of 78mm and a glass mold (lower mold) with 4 curved surfaces with a diameter of 78mm, and a lens with a cen...

Embodiment 2

[0231] In Example 1, except having made β-picoline into 2.50 weight part of 2-methylpyrazine (pKa value=1.50), the lens was obtained by the method similar to Example 1. Although slightly resin-colored, the lens was obtained. The evaluation results are shown in Table-1.

Embodiment 3

[0233] In Example 1, the lens was obtained by the method similar to Example 1 except having used 2.00 weight part of 3-chloropyridine (pKa value=2.84) as β-picoline. The evaluation results are shown in Table-1.

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Abstract

This polymerizable composition for an optical material includes: (A) a compound that has a pKa of 1-9; (B) an iso(thio)cyanate compound that is at least bifunctional; and (C) an active hydrogen compound that is at least bifunctional.

Description

technical field [0001] The present invention relates to a polymerizable composition for optical materials, an optical material, and a method for producing the same. More specifically, it relates to a polymerizable composition for a poly(thio)urethane-based optical material containing a catalyst for poly(thio)urethane reaction, an optical material, and a method for producing the same. Background technique [0002] Compared with inorganic lenses, plastic lenses are lighter and less prone to breakage, so they have rapidly become popular as optical materials such as eyeglass lenses and camera lenses in recent years. [0003] The raw materials that can be used as optical materials have been mainly glass since ancient times, but in recent years, plastics for various optical materials have been developed and widely used as substitutes for glass. Acrylic resins, aliphatic carbonate resins, polycarbonates, and polythiourethanes are gradually being used as materials for spectacle len...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/18C08G18/38C08G18/79G02B1/04
CPCC08G18/2018C08G18/3876C08G18/3865C08G18/2027C08G18/1883C08G18/1808C08G18/792C08G18/73C08G18/758C08G18/725C08G18/757G02B1/041C08L75/04C08L81/00B29C45/14811B29D11/00009C08G18/18C08G18/38C08G18/79G02B5/305B29C2045/14237C08G18/3844C08G18/834B29K2075/00G02B1/08B29C45/14008G02B1/04C08G18/722C08G18/791
Inventor 伊藤伸介古屋政幸末杉幸治西村雄田中守
Owner MITSUI CHEM INC
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