Photocurable polymeric resin comprising a polyether-polybutadiene, hydroxyalkyl(meth)acrylate, alkyldialkanolamine, and a photoinitator

摘要

Photopolymer resins comprise a reaction product of (i).a polyether-polybutadiene prepolymer and a hydroxyalkyl(meth)acrylate further reacted with an alkyl-dialkanolamine and a solvent (ii).a photoinitiator. As general guidance in preparing compositions, the milliequivalents of isocyanate added should be equal to or greater than the total milliequivalents of the remaining components, namely polybutadiene, polyether diol, alkyldialkanolamine, and hydroxyalkyl(meth)acrylate. However, it is generally preferred that the ratio of milliequivalents of isocyanate to nonisocyanate components be approximately equal. Alkyldialanolamine generally is about 15-60% of the nonisocyanate components (based upon total milliequivalents) and preferably about 55-60%. Hydroxyalkyl(meth)acrylate makes up about 7-40% of the total nonisocyanate components, and preferably is about 8%.