Process for preparing polycarbonate having reduced carbonate byp

Details Process for preparing polycarbonate having reduced carbonate byp Process for preparing polycarbonate having reduced carbonate byp

1991-07-02

1993-04-06

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528179, 528182, 528196, 528199, 528371, C08G 6420

Patent

active

052004961

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 terminator in an amount sufficient to give a negative chloroformate test.

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