Low-shrink thermosetting polyesters

Details Low-shrink thermosetting polyesters Low-shrink thermosetting polyesters

1977-11-14

1979-12-11

DeBenedictis, Thomas

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

Synthetic resins

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

525 78, 525272, 525243, 525233, C08L 6706, C08L 7506

Patent

active

041783263

ABSTRACT:
This invention pertains to low-shrink polyester molding resin mixtures primarily based on a certain low-shrink thermoplastic additive produced by synthesizing the vinyl copolymer thermoplastic additive in a hydroxyl terminated polymeric diluent. The resulting vinyl copolymer is dispersed in the hydroxyl containing polymeric diluent which can be post reacted with isocyanate material to produce a polyurethane-vinyl copolymer thermoplastic additive. This thermoplastic additive can be added directly to the thermosetting polyester polymer and monomer mixture to provide a low-shrink molding resin system.

REFERENCES:
patent: 3883612 (1975-05-01), Pratt et al.
patent: 4048257 (1977-09-01), Stevenson
patent: 4051085 (1977-09-01), Hess et al.

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