Preparation of polyestercarbonate from aliphatic dicarboxylic ac

Details Preparation of polyestercarbonate from aliphatic dicarboxylic ac Preparation of polyestercarbonate from aliphatic dicarboxylic ac

1990-01-30

1991-06-18

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528182, C08G 6364

Patent

active

050250817

ABSTRACT:
A process for preparing a copolyestercarbonate which comprises reacting interfacially a dihydric phenol, a carbonate precursor, and a saturated aliphatic alpha omega dicarboxylic acid having from 9 to about 40 carbon atoms wherein the said diacid is from about 2 to about 20 mole percent based on the dihydric phenol reactant content and wherein the initial pH is from about 8 to about 9 for about 70 to about 95% of the carbonate precursor addition time period time period and is then raised to a final pH of from about 10 to 12 for the remainder of the carbonate precursor addition time period.

REFERENCES:
patent: 4238597 (1980-12-01), Markezich et al.

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