Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1990-05-07
1991-08-27
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
526 59, 526 60, 528371, 528372, C08G 6420
Patent
active
050432036
ABSTRACT:
Aromatic polycarbonates are prepared by initially phosgenating a mixture of bisphenol and aqueous alkali metal hydroxide under interfacial reaction conditions to form an oligomeric bisphenol monochloroformate followed by the further introduction of phosgene and base and thereafter the elimination of reacted phosgene and the incorporation of endcapping phenol and tertiary organic amine and additional alkali metal hydroxide into the mixture. Reduced phosgene usage, the substantial elimination of emulsion formation, increased pH measurement accuracy and avoidance of production of diarylcarbonates are substantially provided.
REFERENCES:
patent: 3193528 (1965-07-01), Miller et al.
patent: 3254051 (1966-05-01), Schmitt
patent: 3974126 (1976-08-01), Narita et al.
patent: 4038252 (1977-07-01), Vernaleken et al.
patent: 4367330 (1983-01-01), Hucks et al.
patent: 4737573 (1988-04-01), Silva et al.
patent: 4743676 (1988-05-01), Silva et al.
Fyvie Thomas J.
Silva James M.
Anderson Harold D.
Davis Jr. James C.
General Electric Company
Pittman William H.
Teoli William A.
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