Method for preparing polycarbonates by transesterification in a

Details Method for preparing polycarbonates by transesterification in a Method for preparing polycarbonates by transesterification in a

1994-07-21

1995-10-10

Seidleck, James J.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

525468, 528198, 528200, C08G 6400

Patent

active

054571740

ABSTRACT:
A process for preparing a polycarbonate which comprises performing a transesterification and a polycondensation reaction with a diarylcarbonate and dihydroxyaryl compound, in a reaction apparatus composed of stainless steel comprising at least 12% by weight of Ni, and at least 22% by weight of Cr, and having Fe as the remaining main component. A polycarbonate which has a good color, is stable to hydrolysis and resistant to heat-yellowing is the resulting product.

REFERENCES:
patent: 4383092 (1983-05-01), Ko et al.

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