(Co)polycarbonate composition containing boric acid and a basic

Details (Co)polycarbonate composition containing boric acid and a basic (Co)polycarbonate composition containing boric acid and a basic

1995-06-01

1997-11-04

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

502 1, 502 2, 502 7, 528 4, 528147, 528196, 528198, 528199, 528200, 528404, 528405, C08G 804

Patent

active

056841159

ABSTRACT:
A processes for producing a (co)polycarbonate having a low terminal hydroxyl group concentration and being excellent in heat resistance and hue, which comprises melt-polycondensing a dihydroxy compound with a carbonic diester in the presence of a catalyst for transesterification selected from the group consisting of a nitrogen-containing basic compound, an alkali metal borate and an alkaline earth metal borate and in the presence of a specific ester compound.

REFERENCES:
patent: 4871795 (1989-10-01), Pawar
patent: 5276109 (1994-01-01), Sakashita et al.
DATABASE WPI, AN 93-61696 & JP-A-05 009 283, 28 Jun. 1991, Abstract.

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