Conjugated diene copolymer, a process for producing the copolyme

Details Conjugated diene copolymer, a process for producing the copolyme Conjugated diene copolymer, a process for producing the copolyme

1985-03-26

1991-02-26

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

522 37, 522 40, 522 43, 522 48, 522116, 522117, 522121, 522125, 430287, 52631843, C08F26502, C08F26506, C08F26508, C08F 250

Patent

active

049961349

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.

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