(Co)polycarbonate and borate composition

Details (Co)polycarbonate and borate composition (Co)polycarbonate and borate composition

1995-06-01

1997-08-19

Mosley, Terressa

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

502 1, 502 2, 502 7, 524147, 524148, 524404, C08J 5100

Patent

active

056589786

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: 4269762 (1981-05-01), Thomas
patent: 5276109 (1994-01-01), Sakashita et al.
patent: 5418269 (1995-05-01), Ishiwa et al.
Encyclopedia of Chemical Technology, vol. 4 fourth edition, pp. 365-381 (1992).
Database WPI, AN 93-61696 & JP-A-05 009 283, 28 Jun. 1991, Abstract.

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