Blends of diaryl fluorene carbonate polymers with bisphenol A ca

Details Blends of diaryl fluorene carbonate polymers with bisphenol A ca Blends of diaryl fluorene carbonate polymers with bisphenol A ca

1995-03-21

1996-01-23

Buttner, David

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

Synthetic resins

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

525462, C08L 6900

Patent

active

054865778

ABSTRACT:
Carbonate polymer compositions are prepared comprising a first diaryl fluorene carbonate polymer component and a second bisphenol A carbonate polymer component, the blend composition preferably comprising from about 1 to about 99 weight percent diaryl fluorene carbonate polymer component based on weight of first and second components. Preferably the first diaryl fluorene carbonate polymer component is a copolymer comprising (a) from about 1 up to and including about 99 mole percent dihydroxyaryl fluorene moiety based on the weight of dihydroxyaryl fluorene compound and additional multihydric monomer compound and (b) moieties of at least one additional condensation copolymerizable multihydric monomer compound remnant. In another embodiment, the invention is an improved process for preparing heat resistant diaryl fluorene carbonate polymer composition comprising the step of combining a first diaryl fluorene carbonate polymer component and a second bisphenol A carbonate polymer component, different from the diaryl fluorene carbonate polymer component. These blends can be prepared by known means such as by solution blending or melt blending. It has surprisingly been found that these blend compositions are miscible and transparent across a range of weight ratios and diaryl fluorene contents.

REFERENCES:
patent: 3128264 (1964-04-01), Laakso et al.
patent: 3546165 (1970-12-01), Winthrop
patent: 3781378 (1973-12-01), Kantor et al.
patent: 4310652 (1982-01-01), DeBona et al.
patent: 5196479 (1993-03-01), Laughner et al.
patent: 5391693 (1995-02-01), Nakae

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