Synthesis of polycarbonate from dialkyl carbonate and bisphenol

Details Synthesis of polycarbonate from dialkyl carbonate and bisphenol Synthesis of polycarbonate from dialkyl carbonate and bisphenol

1983-03-25

1984-06-05

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528 86, 528219, 528370, 528371, C08G 6362

Patent

active

044529686

ABSTRACT:
Polycarbonates are formed by the interaction of a bisphenol diester, carbon monoxide and oxygen. The initial polycarbonate product is an oligomer which, upon heat treatment, polymerizes to a high molecular weight polycarbonate. The products produced according to the present invention are chainstopped prior to heat treatment, making them less thermally and oxidatively sensitive.

REFERENCES:
patent: 4096169 (1978-06-01), Chalk
patent: 4182726 (1980-01-01), Illuminati et al.
patent: 4187242 (1980-02-01), Chalk
patent: 4201721 (1980-05-01), Hallgren
patent: 4360477 (1982-11-01), Hallgren et al.

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