Low temperature toughening of polyesters with a modified block c

Details Low temperature toughening of polyesters with a modified block c Low temperature toughening of polyesters with a modified block c

1992-12-30

1994-04-05

Seidleck, James J.

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

Synthetic resins

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

525 65, 525 69, 525 98, C08L 5100, C08L 5104, C08L 5300, C08G 63127

Patent

active

053005678

ABSTRACT:
Toughened polyester compositions are obtained by blending from 60% to 90% by weight of a modified star block copolymer with from 10% to 40% by weight of a polybutylene terephthalate polyester. The modified star block copolymers are free-radically grafted with an effective amount of an epoxy containing compound such as glycidal acrylate or glycidal methacrylate to give a ductile composition having a 1/8 inch notched Izod impact strength of at least 10.0 ft-lb/in at -20.degree. C.

REFERENCES:
patent: 4172859 (1979-10-01), Epstein
patent: 4578429 (1986-03-01), Gergen
patent: 4647619 (1987-03-01), Dean
patent: 4657970 (1987-04-01), Shiraki
patent: 4657971 (1987-04-01), Shiraki
patent: 5066726 (1991-11-01), Modic

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