Polyester carbonate copolymers, processes for preparing same and

Details Polyester carbonate copolymers, processes for preparing same and Polyester carbonate copolymers, processes for preparing same and

1989-06-14

1991-04-23

Bleutge, John C.

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

Synthetic resins

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

525466, C08L 6900, C08L 6702

Patent

active

050101463

ABSTRACT:
In accordance with the present invention, there are provided polyester carbonate copolymers obtained by polymerization of a mixture of 20-80% by weight of an alkylene terephthalate oligomer [I] containing ethylene terephthalate as main structural units and having an intrinsic viscosity [.eta.], as measured at 25.degree. C. in o-chlorophenol, of less than 0.6 dl/g, and 20-80% by weight of a carbonate oligomer [II] containing 2,2-bis(4 -hydroxyphenyl)propane as main structural units and having an intrinsic viscosity [.eta.], as measured at 25.degree. C. in o-chlorophenol, of less than 0.6 dl/g, said copolymers having an intrinsic viscosity [.eta.], as measured at 25.degree. C. in o-chlorophenol, of 0.4-1.2 dl/g and a glass transition temperature (Tg) of 80.degree.-140.degree. C. with a single peak, and polyester resin compositions containing said copolymers, said resin composition being excellent in transparency, heat resistance and mechanical strength.

REFERENCES:
patent: 3426100 (1969-02-01), McDonough
patent: 3998908 (1976-12-01), Buxbaum
patent: 4226961 (1980-10-01), Motz
patent: 4367317 (1983-01-01), Fox
patent: 4429083 (1984-01-01), Nakagawa et al.

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