19-01-2017 дата публикации
Номер: US20170015776A1
A polymerizable composition for an optical material of the present invention includes polyisocyanate (a) including aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2), an episulfide (b), and a polythiol (c). 1. A polymerizable composition for an optical material including:polyisocyanate (a) including aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2);an episulfide (b); anda polythiol (c).2. The polymerizable composition for an optical material according to claim 1 ,wherein the modified aliphatic polyisocyanate (a2) is an isocyanurate of the aliphatic polyisocyanate.3. The polymerizable composition for an optical material according to claim 1 ,wherein the aliphatic polyisocyanate (a1) and/or the aliphatic polyisocyanate in the modified aliphatic polyisocyanate (a2) are obtained from plant-derived materials.5. The polymerizable composition for an optical material according to claim 1 ,wherein the episulfide (b) includes an episulfide obtained from plant-derived materials.6. The polymerizable composition for an optical material according to claim 1 ,wherein the aliphatic polyisocyanate (a1) and/or the aliphatic polyisocyanate in the modified aliphatic polyisocyanate (a2) is at least one selected from 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,7-heptamethylene diisocyanate, lysine diisocyanate, lysine triisocyanate, dimer acid diisocyanate, octamethylene diisocyanate, and decamethylene diisocyanate.7. The polymerizable composition for an optical material according to claim 1 ,wherein the polythiol (c) is at least one selected from 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 4,8 or 4,7 or 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, pentaerythritol tetrakis mercaptoacetate, pentaerythritol tetrakis mercaptopropionate, 2,5-bis(mercaptomethyl)-1,4-dithiane, bis(mercaptoethyl)sulfide, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, 2-(2,2-bis( ...
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