The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 1991
Filed:
Mar. 26, 1985
Japan Synthetic Rubber Co., Ltd., Tokyo, JP;
Abstract
A conjugated diene copolymer comprising (A) 10 to 60 mole % of a conjugated diene compound unit, (B) 5 to 50 mole % of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid unit, (C) 0.1 to 20 mole % of a polyfunctional alkenyl compound unit, (D) 0 to 10 mole % of a diene compound unit having cyclic carbon-carbon double bonds and (E) 0 to 80 mole % of a monoolefinically unsaturated compound unit, the sum of the amounts of units (A), (B), (C), (D) and (E) being 100 mole %, said copolymer having an intrinsic viscosity [.eta.] of 0.01 to 3.0 dl/g as measured at 30.degree. C. in dimethylformamide. The copolymer is soluble in aqueous alkali solutions, excels in processability and photosetting property, and has excellent rubber elasticity and transparency even after photosetting. Accordingly, a photosensitive composition comprising the copolymer, a photopolymerizable unsaturated monomer and a photosensitizer can greatly improve the complicated process for the production of conventional rubber relief plates of flexographic printing, and shorten the production time.