Conjugated diene copolymer, a process for producing the...

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

C - Chemistry, Metallurgy

08

F

96/150, 400/5051

C08F 236/04 (2006.01) G03F 7/033 (2006.01)

Patent

CA 1255836

ABSTRACT OF THE DISCLOSURE 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 carboxy- lic 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 [?] of 0.01 to 3.0 dl/g as measured at 30°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 photosensiti- zer can greatly improve the complicated process for the production of conventional rubber relief plates of flexo- graphic printing, and shorten the production time.

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