Continuous production of polycarbonates

Details Continuous production of polycarbonates Continuous production of polycarbonates

1992-05-29

1993-08-10

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

526 59, 526 60, 528198, 528199, C08G 6420

Patent

active

052350266

ABSTRACT:
An improvement to the continuous process for the production of polycarbonates by interphase polycondensation is described. Accordingly, the organic phase and the aqueous phase are combined in a tube, forming chlorocarbonic acid ester and further alkali hydroxide is added at, or shortly after, the maximum concentration of said ester is reached. The resulting emulsion is then changed to an oil-in-water emulsion which is then separated and worked up in known manner.

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