US2011269914A1PendingUtilityA1

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

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Assignee: MITSUI CHEMICALS INCPriority: Aug 5, 2009Filed: Jul 11, 2011Published: Nov 3, 2011
Est. expiryAug 5, 2029(~3 yrs left)· nominal 20-yr term from priority
Inventors:Akinori RyuSeiichi Kobayashi
C08G 18/3206G02B 1/041C08G 18/73G02B 1/04C08G 18/7614C08L 75/04C08G 18/724C08G 18/3876C08G 18/7621C08G 18/38G02C 7/02
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Claims

Abstract

A polymerizable composition for an optical material containing tolylene diisocyanate, an aliphatic polyisocyanate having 4 to 8 carbon atoms, one or more polythiols selected from pentaerythritol tetrakismercaptoacetate and pentaerythritol tetrakismercaptopropionate and an active hydrogen compound containing two or more active hydrogen groups, is provided.

Claims

exact text as granted — not AI-modified
1 . A polymerizable composition for an optical material comprising tolylene diisocyanate, an aliphatic polyisocyanate having 4 to 8 carbon atoms, one or more polythiols selected from pentaerythritol tetrakismercaptoacetate and pentaerythritol tetrakismercaptopropionate and an active hydrogen compound containing two or more active hydrogen groups in the molecule. 
     
     
         2 . The polymerizable composition for an optical material according to  claim 1 , wherein said aliphatic polyisocyanate having 4 to 8 carbon atoms is one or more polyisocyanates selected from hexamethylene diisocyanate and pentamethylene diisocyanate. 
     
     
         3 . An optical material obtained by curing the polymerizable composition for an optical material according to  claim 1 . 
     
     
         4 . The method for producing an optical material, the method comprising curing the polymerizable composition for an optical material according to  claim 1 . 
     
     
         5 . The method for producing an optical material according to  claim 4 , wherein said polymerizable composition for an optical material is molded by cast polymerization.

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