Composition for optical material and method for producing same, and optical material produced from composition for optical material

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United States of America Patent

PATENT NO 9914799
SERIAL NO

15119854

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Abstract

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According to the present invention, a composition for an optical material can be provided, which is characterized by containing an episulfide compound having a value of turbidity in acetone of 3.0 ppm or less. According to a preferred embodiment of the present invention, a composition for an optical material can be provided, which comprises: (a) a compound (an episulfide compound) which has a structure represented by formula (1) and has a value of turbidity in acetone of 3.0 ppm or less; (b) a polyisocyanate compound; and (c) a polythiol compound.

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Patent Owner(s)

  • MITSUBISHI GAS CHEMICAL COMPANY, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aoki, Takashi Osaka, JP 463 4880
Horikoshi, Hiroshi Tokyo, JP 99 577
Konishi, Tetsuya Osaka, JP 33 537
Takemura, Kouhei Osaka, JP 48 254

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