Vinyl-terminated polyesters and polycarbonates for flexibilizing

Details Vinyl-terminated polyesters and polycarbonates for flexibilizing Vinyl-terminated polyesters and polycarbonates for flexibilizing

1993-01-07

1994-08-30

Buttner, David

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523457, 523467, 523514, 523523, 523527, 525 28, 525 31, 525 44, 525168, 525170, 525468, 526314, C08L 6706, C08L 6707, C08L 6310

Patent

active

053425545

ABSTRACT:
Vinyl-terminated polyesters and vinyl-terminated aliphatic polycarbonates are described which improve the flexibility and elongation at failure of cured samples of unsaturated polyesters or vinyl ester resins both at room temperature and at high temperatures, and without significant loss of surface quality or other mechanical properties. Further, these polymers do not phase separate from uncured polyester resin/styrene solutions, do not significantly increase the initial viscosity of molding compositions in which they have been incorporated, and do not negate the effect of low shrinkage additives during cure.

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