Cyclic polyphenylene ether-polycarbonate oligomers

Details Cyclic polyphenylene ether-polycarbonate oligomers Cyclic polyphenylene ether-polycarbonate oligomers

1988-03-07

1989-11-14

Anderson, Harold D.

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

Synthetic resins

From reactant having a halogen atom or oxygen single bonded...

528196, 528201, 528204, 528371, 528372, C08G 6362

Patent

active

048808997

ABSTRACT:
Cyclic polyphenylene ether-polycarbonate oligomer compositions are prepared from bishaloformates and bisphenols, at least one of which includes a spirobiindane moiety and the other of which is derived from a bisphenol-terminated polyphenylene ether oligomer. The cyclic compositions may be converted to linear copolycarbonates by treatment with a polycarbonate formation catalyst.

REFERENCES:
patent: 4605731 (1986-08-01), Evans et al.
patent: 4616077 (1986-10-01), Silva
patent: 4644053 (1987-02-01), Brunelle et al.
patent: 4736016 (1988-04-01), Brunelle et al.

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