Reduced TG copolyestercarbonate

Details Reduced TG copolyestercarbonate Reduced TG copolyestercarbonate

1993-11-18

1995-10-03

Seidleck, James J.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528190, 528193, 528198, 528204, C08G 6400

Patent

active

054553237

ABSTRACT:
A reduced glass transition temperature copolyester-carbonate which displays non-Newtonian melt behavior was synthesized by using bisphenol-A, a dicarboxylic acid and a trisphenol. The branched copolymer was obtained by interfacial phosgenation. One of the compositions described displays a Tg of about 127.degree. C. and twice the melt flow index of a branched polycarbonate of corresponding molecular weight or intrinsic viscosity.

REFERENCES:
patent: 4446298 (1984-05-01), Mark et al.
patent: 4888400 (1989-12-01), Boden et al.
patent: 5021521 (1991-06-01), Krabbenhoft et al.
patent: 5274069 (1993-12-01), Vicari et al.

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