Process for producing (co)polycarbonate and (co)polycarbonate co

Details Process for producing (co)polycarbonate and (co)polycarbonate co Process for producing (co)polycarbonate and (co)polycarbonate co

1993-09-09

1995-02-07

Kight, III, John

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524119, 524120, 524126, 524130, 524132, 524133, 524135, 524601, 524611, 524710, C08K 515

Patent

active

053876288

ABSTRACT:
A process for producing a (co)polycarbonate or a (co)polyestercarbonate having a high molecular weight and excellent hue, heat stability and mechanical properties by reacting a dihydroxyl compound with a diester of carbonic acid and/or a diester of dicarbonic acid in the presence of a transesterification catalyst, wherein at least part of the reaction process is conducted in the presence of a specified organic phosphorus compound, or, in the presence of a specified organic phosphorus compound and a hindered phenol compound. A (co)polycarbonate or (co)polyester-carbonate composition having excellent hue, heat stability and mechanical properties, comprising a (co)polycarbonate and/or a (co)polyestercarbonate and, a specified organic phosphorus compound, or, a specified organic phosphorus compound and a hindered phenol compound.

REFERENCES:
patent: 3321439 (1967-05-01), Bollert et al.
patent: 4973652 (1990-11-01), Ebert et al.
patent: 5250655 (1993-10-01), Yokoyama et al.

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