Method for making polycarbonate substantially free of diaryl car

Details Method for making polycarbonate substantially free of diaryl car Method for making polycarbonate substantially free of diaryl car

1993-05-24

1994-04-05

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528126, 528171, 528174, 528196, 528198, 528202, C08G 6424

Patent

active

053006232

ABSTRACT:
A method is provided for making polycarbonate by phosgenating a mixture of bisphenol and phenolic chain-stopper under interfacial reaction conditions in the presence of a phase transfer catalyst. A polycarbonate is obtained which is substantially free of diarylcarbonate.

REFERENCES:
patent: 4737573 (1988-04-01), Silva et al.
patent: 4743676 (1988-05-01), Silva et al.
patent: 4939230 (1990-07-01), Munjal et al.
patent: 5043203 (1991-08-01), Fyvie et al.

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