Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1994-03-07
1995-05-02
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528196, C08G 6400
Patent
active
054120616
ABSTRACT:
The present invention is directed to a method of making polycarbonates by the melt condensation of diarylcarbonate and dihydric phenol in the presence of a tetraorganophosphonium carboxylate salt, such as tetrabutylphosphonium acetate.
REFERENCES:
patent: 4766184 (1988-08-01), Hefner, Jr.
patent: 5037903 (1991-08-01), Parker
Article-DF Fox, In "Kirk-Othmer Encyclopedia of Chemical Technology", 3rd Ed.; HF Mark, et zl. New York, 1982, vol. 18, pp. 479-494.
Article-Linear Aromatic Polyesters of Carbonic Acid, H. Schnell-Ind. & Eng. Ehcm. 51, 157 (1959) (4 pages).
King, Jr. Joseph A.
McCloskey Patrick J.
General Electric Company
Kight III John
Mosley Terressa
Pittman William H.
Teoli William A.
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