Process for producing polycarbonate

Details Process for producing polycarbonate Process for producing polycarbonate

1995-08-29

1996-08-20

Seidleck, James J.

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

Synthetic resins

Polymerizing in reactor of specified material, or in reactor...

525468, 528196, 528198, 528200, C08F 200

Patent

active

055480411

ABSTRACT:
A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in a reactor made of stainless steel and treated by electropolishing or acid pickling or buffed on a surface part thereof which contacts the reactants. As the transesterification catalyst, (a) a nitrogen-containing, electron-donating compound and (b) a nitrogen-containing, electron-donating compound and an alkali metal compound or an alkaline earth metal compound are preferably used.

REFERENCES:
CHEMICAL ABSTRACTS, vol. 116, No. 20, May 18, 1992, U.S.A., T. Yamoto et al., p. 18, No. 195 134r; & JP-A-04 007 329 (Daicel Chemical).
CHEMICAL ABSTRACTS, vol. 116, No. 20, May 18, 1992, U.S.A., T. Yamoto et al., p. 18, No. 195 135s; & JP-A-04 007 328 (Daicel Chemical).

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