Patent ID: 6066436
Filing Date: 2000-05-23
Classification: C08G

Abstract:
A photocurable polymeric resin composition for use in making aqueous developable flexographic printing plates, said resin composition comprising:(a) photoinitiator; and(b) reaction product of a process comprising:(i) reacting polyether-polybutadiene prepolymer with hydroxalkyl (meth)acrylate to form a reaction mixture; and(ii) reacting said reaction mixture further with alkyldialkanolamine in the presence of solvent;wherein said polyether-polybutadiene prepolymer is isocyanate-terminated, and wherein the ratio by equivalents of polybutadiene to polyether in said prepolymer is from 1:1 to 1:5, and the polyether is the residue of a polyether diol of the formula HO--(A--O--).sub.b H, where each A is, independently, ethylene, propylene, isopropylene, butylene, or isobutylene, and b is such that the polyether diol has a number average molecular weight of about 1000 to 3500, the polyether diol being ethylene oxide block polyether diol containing about 10-30% by weight ethylene oxide units.