Patent ID: 6555292
Filing Date: 2003-04-29
Classification: G03F

Abstract:
A process for fabricating a printing plate, said process comprising:a). selectively exposing a photosensitive resin composition consisting essentially of: 1). an ethylenically unsaturated polyurethane prepolymer which is the reaction product of X, Y and P and which prepolymer has the following structure: Yâ€²âˆ’Xâ€²&Parenopenst;Pâ€²âˆ’Xâ€²&Parenclosest;nYâ€²â€ƒwherein P is selected from the group consisting of hydrogenated polybutadiene diols, hydrogenated polyisoprene diols, copolymer diols of hydrogenated butadiene with styrene, mixtures of any of the foregoing diols, and mixtures of any of the foregoing diols with a compound selected from the group consisting of unsaturated polyolefin diols, short chain diols, and mixtures of any of the foregoing; wherein X is independently selected from the group consisting of aromatic diisocyanates, aliphatic diisocyanates and mixtures of the foregoing; wherein Y is selected from the group consisting of acrylates, methacrylates and mixtures of the foregoing; wherein n is an integer of from 1 to 20; wherein Pâ€², Xâ€² and Yâ€² are the reaction residues of P, X and Y; 2). at least one ethylenically unsaturated monomer; and 3). at least one photopolymerization initiator; â€ƒto actinic radiation; and b). developing away any unpolymerized photosensitive resin.