Method of preparing polycarbonates by solid state polymerization

Details Method of preparing polycarbonates by solid state polymerization Method of preparing polycarbonates by solid state polymerization

1997-12-08

1999-05-18

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C08G64/00

Patent

active

059051353

ABSTRACT:
Crystallization of precursor polycarbonates prior to solid state polymerization is achieved by contact with a non-solvent comprising, at least in part, a dialkyl carbonate such as dimethyl carbonate. The non-solvent can be a mixture, typically of dimethyl carbonate with water or an alkanol such as methanol.

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Database WPI, Section Ch, Week 9443, Derwent Publications Ltd., London, GB; Class A23, AN 94-347191, XP002077267 & JP: 06 271659 A (Asahi Kasei Kogyo KK), Sep. 27, 1994.
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Database WPI, Section Ch, Week 9309, Derwent Publications Ltd., London, GB; Class A23, AN 93-071177, XP002077269 & JP 05 017565 A (Daicel Chem Ind Ltd), Jan. 26, 1993.

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