Patent ID: 6214522
Filing Date: 2001-04-10
Classification: B41M,G03F

Abstract:
A photopolymer composition comprising:a. a polyurethane prepolymer prepared by reacting at least one diisocyanate with at least one polyether diol having olefin unsaturation equal to or less than 0.01 meq/gm to form an oligomer and further reacting the oligomer with at least one hydroxy functionalized (meth) acrylate to form the polyurethane prepolymer;b. at least one monomer; andc. at least one photoinitiator;wherein at least one polyether diol having olefin unsaturation equal to or less than 0.01 meq/gm is a copolymer selected from the group consisting of random ethylene oxide-propylene oxide copolymers, ethylene oxide-propylene oxide segmented copolymers, and mixtures thereof.