Method for preparing copolycarbonates of enhanced crystallinity

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate

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528198, C08G 6400

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active

060605766

ABSTRACT:
Copolycarbonates of enhanced crystallinity, suitable for solid state polymerization, are prepared by melt blending, under non-reactive conditions, an amorphous precursor polycarbonate such as a bisphenol A polycarbonate with one or more other monomers which may include a spiro(bis)indane bisphenol and/or a phenylindane bisphenol, optionally with a polyoxyalkylene glycol. The resulting blend is pelletized and the crystallinity of the resulting pellets is enhanced, typically by contact with an alkanol liquid or vapor.

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Concurrently filed U.S. Patent Application RD-26316, entitled "Method for Preparing Polycarbonates of Enhanced Crystallinity", by James Day et al.

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