Polycarbonate having reduced carbonate byproduct content

Details Polycarbonate having reduced carbonate byproduct content Polycarbonate having reduced carbonate byproduct content

1994-02-16

1994-11-08

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528179, 528182, 528196, 528371, C08G 6400

Patent

active

053628390

ABSTRACT:
A process for preparing polycarbonate wherein a chain terminator is added to the reaction mixture after substantial reaction of a carbonate precursor, a coupling catalyst is added to the reaction mixture after substantial reaction of the chain terminator, and base is added to the reaction mixture after reaction mixture after substantial reaction of the chain terminatorin an amount sufficient to give a negative chloroformate test.

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