Patent ID: 9678246
Date: 2017-06-13
CPC Classifications: B29C,B29D,B29K,C08G,C08K,G02B

Claim:
1. A polymerizable composition for an optical material comprising: (A) one or more isocyanates having two or more isocyanato groups that contains an aromatic isocyanate; (B) one or more alcohols having two or more hydroxyl groups; and (C) an acid phosphate represented by the following formula (1): wherein m represents an integer of 1 or 2, n represents an integer of 0 to 18, R wherein a ratio of the molar number of a secondary hydroxyl group to the total molar number of primary and secondary hydroxyl groups contained in the alcohol (B) is 50% or higher, and wherein the alcohol (B) is one or more compounds selected from propylene oxide adducts of glycerol, propylene oxide adducts of trimethylolpropane, and propylene oxide adducts of pentaerythritol.