Curable unsaturated polyester dresin composition

Details Curable unsaturated polyester dresin composition Curable unsaturated polyester dresin composition

1991-09-19

1992-11-17

Short, Patricia A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

523522, 525 69, 525 90, 525 91, C08L 6706

Patent

active

051644487

ABSTRACT:
Curable unsaturated polyester resin compositions from which molded products with superior surface smoothness can be obtained include a block copolymer of a specified form, an unsaturated polyester, a vinyl monomer, a filler, a curing catalyst and a reinforcing fiber. The block copolymer is of the form A--(B).sub.n where A is non-hydrogenated polyisoprene block having viscosity average molecular weight of 10000 or more, B is saturated polyester block obtainable by condensation of organic dicarboxylic anhydride and 1,2-epoxide, more than 50 mol % of terminal groups of the polyester block being carboxylic acid group, A and B are connected by ester linkage and n is not less than 2. Block copolymers of this type can be formed by starting with carboxylic acid or hydroxyl group in polyisoprene and by alternate condensation of organic dicarboxylic anhydride and 1,2-epoxide.

REFERENCES:
patent: 3705208 (1972-12-01), Nakamuta
patent: 4670485 (1987-06-01), Hesse
patent: 4851474 (1989-07-01), Willis

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