Higher heat degradable polymer alloys

Details Higher heat degradable polymer alloys Higher heat degradable polymer alloys

1991-10-03

1994-04-05

Kight, III, John

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

Synthetic resins

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

525 55, 525 56, 525100, 525102, 525397, 525419, 525421, 525422, 525425, 525429, 525431, 525450, 525451, 525454, 525455, 528354, C08L 6704, C08G 6308

Patent

active

053005767

ABSTRACT:
The thermal properties, such as heat distortion temperature of biodegradable polymers, such as polylactic acid, polyglycolides, polybutyric acid and copolymers of butyric and valeric acid, may be increased by blending them with a polymer having Tg from 75.degree. C. to 200.degree. C. and a Hildebrand parameter (.sigma.) of not more than 3 MPA.sup.1/2 different from the biopolymer.

REFERENCES:
patent: 3336267 (1967-08-01), Zimmerman et al.
patent: 4246374 (1981-01-01), Kopchik
patent: 4477654 (1984-10-01), Holmes et al.
patent: 4569969 (1986-02-01), Jones et al.
patent: 4631311 (1986-12-01), Wingler et al.
patent: 5061281 (1991-10-01), Mares et al.
patent: 5066772 (1991-11-01), Tang et al.

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