Solid state process for the preparation of high molecular weight

Details Solid state process for the preparation of high molecular weight Solid state process for the preparation of high molecular weight

1992-05-05

1993-11-30

Anderson, Harold D.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528196, 528199, 528371, C08G 6440

Patent

active

052666590

ABSTRACT:
The invention disclosed is an improved process for the preparation of high molecular weight poly(arylcarbonate), the molecular weight ranging from 45,000-60,000 (corresponding to n.sub.inh 0.8 to 1.0) The process involves heating in a controlled manner, a BPA-polycarbonate oligomer in the presence of a catalyst selected from alkali metal aryl acid, alkali metal borohydrial and a quarternary ammonium salt of bioxiyanion derived from a carboxylic acid poly(arylcarbonate)s of high molecular weight produced by the process of present invention show enhanced crystallinity.

REFERENCES:
patent: 4107143 (1978-08-01), Inata et al.
patent: 4452968 (1984-06-01), Bolon et al.

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