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

1993-06-02

1995-02-21

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

524117, 524119, 524120, 524126, 524130, 524132, 524133, 524135, 524601, 524611, 524710, 528199, 528179, 528180, 528181, 528182, C08G 6400

Patent

active

053916905

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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