Redistribution of organic polyestercarbonate compositions

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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2641761, 26421124, 525437, 525469, 528176, 528193, 528194, 528196, 528198, 528199, 528201, 528481, 528489, 528490, 528491, 528502, C08F28302, C08G 6400

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active

056523122

ABSTRACT:
Polyestercarbonates, particularly those containing aliphatic dicarboxylic acid-derived structural units, are redistributed by heating in the presence of a carbonate redistribution catalyst, and, optionally, a diaryl carbonate. The redistribution products have weight average molecular weights different from, and typically lower than, the initial molecular weight.

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patent: 5391690 (1995-02-01), Kanno et al.
patent: 5414057 (1995-05-01), Campbell et al.

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