Patent ID: 9279907
Filing Date: 2016-03-08
CPC Classification: C07D,C08F,C08G,G02B

Claim Text:
1. A method of preparing an optical article comprising: (1) reacting together: wherein the reactants (a) and (b) are reacted via a Michael addition reaction in the presence of a base to form an epoxide functional reaction product; (2) reacting the epoxide functional reaction product formed in step (1) with thiourea to form a thioepoxide functional, polymerizable composition; (3) mixing the thioepoxide functional, polymerizable composition formed in step (2) with: (4) introducing the reaction mixture formed in step (3) to a mold of a desired shape at a temperature and for a time sufficient to form a polymerizate; and (5) releasing the polymerizate from the mold to yield an optical article.