Patent ID: 8716413
Filing Date: 2014-05-06
Classification: B33Y,C08G,C08L,C09D,C09J,G03F

Abstract:
1. Method for the preparation of a photocurable resin by a reaction comprising the following steps: i) reacting a mixture of a novolak type epoxy resin (A) represented by formula (I) wherein R and a dicyclopentadiene-phenol glycidylether resin (B) represented by formula (II) wherein R with ii) an advancement component (C) selected from the group consisting of bisphenol A, bisphenol F, bisphenol S and resorcinol; iii) reacting with crotonic acid, cinnamic acid or acrylic acid (D); and iv) esterification of the unsaturated group containing resin obtained from the steps of i) to iii) with a carboxylic acid anhydride selected from the group consisting of succinic anhydride, maleic anhydride, glutaric anhydride, tetrahydrophthalic anhydride, itaconic anhydride, phthalic anhydride, hexahydrophthalic anhydride, methyl-hexahydrophthalic anhydride, ethyl-hexahydrophthalic anhydride, methyl-tetrahydrophathalic anhydride and ethyl-tetrahydrophthalic anhydride (E) wherein the weight ratio of novolak type epoxy resin (A) to dicyclopentadiene-phenol glycidylether resin (B) is from 5 to 2:1.