Abstract:
A polycarbonate resin is reacted with a cinnamoylating agent such as cinnamoyl chloride to produce a novel photopolymer, a polycarbonate-cinnamate resin. The photopolymers are useful for making photoresist plates and presensitized negative-working printing plates.
Abstract:
A BLOCKED POLYURETHANE RESIN, ISOCYANATE TERMINATED, WITH ISOCYANATE GROUPS TREATED WITH PHENOL, AND THEN HEATED TO DRIVE OFF THE PHENOL AND REACTED WITH A POLYOL, IS REACTED WITH A CINNAMOLYLATING AGENT TO MAKE A POLYURETHANE CINNAMATE WHICH IS A PHOTOPOLMER.
Abstract:
BISPHENOL-A-FUMARATE POLYESTER RESIN IS REACTED WITH A CINNAMOYLATING AGENT, SUCH AS CINNAMOYL CHLORIDE, TO GIVE A PHOTOPOLYMER, USEFUL IN LITHOGRAPHIC PLATES.
Abstract:
A photopolymer adapted for use in lithography, photomechanical processes, or other applications, consisting essentially of an actinic light-tanned product of a phenoxy resin of high molecular weight formed in the presence of a sensitizer which is a diazo resin or a chromium compound, such as ammonium bichromate. A photopolymer-yielding system or combination consisting essentially of a phenoxy resin and a sensitizer, which is a diazo resin or chromium compound yielding hexavalent chromium, the resin and sensitizer being in contact with each other. A lithographic plate including such photopolymer or such photopolymer-yielding system or combination. A method of making such photopolymer, comprising subjecting such photopolymer system or combination to treatment with actinic light.