Photocurable composition comprising maleic anhydride adduct of polybutadiene or butadiene copolymers
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United States of America Patent
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Apr 18, 1995
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app pub date -
Mar 22, 1991
filing date -
Apr 26, 1990
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Abstract
An aqueous-developable article is made from a photoprepolymer made by reacting a maleated polyalkadienyl homo- or copolymer (e.g., polybutadiene) with an olefinically unsaturated compound capable of opening anhydride rings (e.g., hydroxyethyl methacrylate) with simultaneous chain extension using a polyalkadienyl polyol, followed by hydrolysis and neutralization with Li--, Na--, or K-containing base. When formulated with unsaturated monomers and photoinitiators, the photoprepolymer is particularly useful in making photopolymer-based flexographic printing plates.
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