Polyphenylene ether-polycarbonate copolymers and method of prepa

Details Polyphenylene ether-polycarbonate copolymers and method of prepa Polyphenylene ether-polycarbonate copolymers and method of prepa

1987-02-17

1988-10-11

Short, Patricia

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

Synthetic resins

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

525394, 525462, 525905, C08G 8100

Patent

active

047772212

ABSTRACT:
Polyphenylene ether-polycarbonate copolymers are prepared by reacting a polyphenylene ether, preferably one which has been acid-functionalized by reaction with a compound such as maleic anhydride or fumaric acid, with an aromatic polycarbonate at a temperature of at least about 175.degree. C. in the presence of a polycarbonate-forming transesterification catalyst, typically a tetraalkyl titanate or a tetraalkylammonium tetraphenylborate. Under these conditions, the polycarbonate chain is cleaved and fragments thereof are chemically bonded to the polyphenylene ether.

REFERENCES:
patent: 3153008 (1964-10-01), Fox
patent: 3875256 (1975-04-01), White
patent: 4374233 (1983-02-01), Loucks et al.
patent: 4377662 (1983-03-01), Loucks

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