(Co) Polycarbonate and process for producing the same

Details (Co) Polycarbonate and process for producing the same (Co) Polycarbonate and process for producing the same

1994-01-28

1995-11-14

Seidleck, James J.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, 528198, C08G 6400

Patent

active

054667747

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: 5026817 (1991-06-01), Sakashita et al.
patent: 5151491 (1992-09-01), Sakashita et al.
patent: 5324809 (1994-06-01), Sakashita et al.

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