Low shrinkage unsaturated polyester resin compositions

Details Low shrinkage unsaturated polyester resin compositions Low shrinkage unsaturated polyester resin compositions

1979-12-04

1982-03-30

Ziegler, J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525165, 525169, 525171, 525176, 525177, 523514, 523516, 523521, 523523, C08L 6700, C08L 6702

Patent

active

043223346

ABSTRACT:
Unsaturated polyester resin compositions that have a low shrinking property, and at the same time, an enough strength are provided. The compositions comprises (1) 30-70 parts by weight of an unsaturated polyester obtained by reacting terephthalic acid and/or isophthalic acid and one or more of unsaturated acids selected from the group consisting of maleic anhydride, maleic acid and fumaric acid, with a glycol, and having the unsaturation degree of 1.5-5.0 and the acid value of 18-40, (2) 70-30 parts by weight of .alpha.,.beta.-ethylenically unsaturated monomer, and (3) 5-30 parts by weight of a thermoplastic resin having the number average molecular weight of 5,000-500,000.

REFERENCES:
patent: 3489707 (1970-01-01), Fry

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