Diazo-unsaturated monomer light sensitive compositions
AssigneePolychrome Corporation
InventorsWilliam Rowe, Eugene Golda
Life of this patent
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Abstract
Improved compositions comprising solvent-soluble, negative-acting or positive-acting light-sensitive diazonium compounds and solvent-soluble unsaturated monomers which are the products of about two equivalents of an organic diisocyanate with about one equivalent of an active hydrogen-containing organic compound, e.g., an alcohol or amine, preferably a polyol, which products are subsequently reacted with an unsaturated compound which contains an active-hydrogen, preferably in a hydroxyl group, available to react with the remaining isocyanate groups. The compositions can be coated onto suitable base sheet materials to form presensitized lithographic printing plates, proofs for multi-color printing, visual aids, printed circuits and the like.
Claims8
A light sensitive element which comprises:
- a substrate and an ultraviolet radiation curable composition applied to at least one surface of said substrate, which composition comprises the admixture of:
- I. From about 10 to 95% by weight of an unsaturated monomer, based on total weight of the unsaturated monomer and diazonium compound, wherein the unsaturated monomer is the reaction product of:
- A. one equivalent of an isocyanate containing intermediate which is the reaction product of i. about one equivalent of a polyol with ii. two equivalents of a diisocyanate and
- B. one equivalent of a monomeric olefinically active hydrogen in the form of a hydroxyl group, said reaction product being a monomeric, solvent-free liquid containing zero percent free isocyanate groups, and
- II. From about 1 to 95% by weight, based on the weight of the unsaturated monomer, of one or more solid resins selected from the group consisting of polyurethanes, epoxies, polyvinyl acetals, polyethylene oxides, polyamides, phenol formaldehydes, acrylics, ureaformaldehydes, and cellulosic resins, and
- III. From about 10-95%, based on total weight of unsaturated monomer and diazonium compound of a light sensitive, negative acting diazonium compound,
- whereby before light exposure said admixture is organic solvent soluble, water emulsifiable and is capable of forming a non-tacky solid film and after light exposure said admixture is not soluble in organic solvents and is non-water emulsifiable.
Dependencies are inferred from the claim text.