Binary phase transfer/amine catalyst for making aromatic polycar

Details Binary phase transfer/amine catalyst for making aromatic polycar Binary phase transfer/amine catalyst for making aromatic polycar

1996-10-21

1998-04-14

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

502162, 502164, 502167, 502200, C08G 6400

Patent

active

057392579

ABSTRACT:
A composition and method is provided for making polycarbonate utilizing an effective amount of a binary catalyst system, comprising a phase transfer catalyst selected from the group consisting of methyltributylammonium halide and hexabutylbutylenediammonium halide and a tertiary organic amine, as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization and the substantial elimination of emulsion formation in the interfacial polymerization reactor and the processing units downstream thereof results.

REFERENCES:
patent: 4471105 (1984-09-01), Campbell
patent: 5260418 (1993-11-01), Wulff et al.
patent: 5300624 (1994-04-01), Boden et al.
Japanese Patent Publication No. 44-22310 Mar. 24, 1969.

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