Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1994-02-02
1995-02-21
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528196, 528198, C08G 6400
Patent
active
053916921
ABSTRACT:
A method is provided for making polycarbonate utilizing an effective amount of a phase transfer catalyst, such as tetrabutylammonium bromide as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization is achieved.
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Boden Eugene P.
Flowers Larry I.
Odle Roy R.
Phelps Peter D.
Ramsey David L.
General Electric Company
Kight III John
Mosley Terressa
Pittman William H.
Teoli William A.
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