Process for preparation of polycarbonate

Details Process for preparation of polycarbonate Process for preparation of polycarbonate

1990-02-02

1991-06-18

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, 528198, 528204, C08G 6428, C08G 6430

Patent

active

050250833

ABSTRACT:
A polycarbonate is produced by melt-polycondensing (A) a dihydric phenol with a co-monomer selected from the group consisting of (B) bisphenol carbonate, (C) bis(2,4,6-trichlorophenyl) carbonate (D) bis(2,4,-dichlorophenyl) carbonate and (E) bis(2-cyanophenyl) carbonate in the presence of a catalyst selected from among electron-donating amine compounds and salts thereof. The process of the invention saves the use of phosgene which is poisonous and prevents the resulting polycarbonate from incorporation thereinto of chlorine ions.

REFERENCES:
patent: 4286085 (1981-08-01), Jaquiss et al.

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