Process for production of stabilized polycarbonate

Details Process for production of stabilized polycarbonate Process for production of stabilized polycarbonate

1996-06-19

1997-09-16

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524156, 524157, 524158, 524159, 524912, 524913, C08K 550, C08K 541, C08K 542

Patent

active

056682026

ABSTRACT:
A process for the production of a stabilized polycarbonate which comprises melt-polycondensing an aromatic dihydroxy compound and a carbonic acid diester in the presence of a polycondensation catalyst and then, after the reaction mixture shows an intrinsic viscosity of at least 0.1, adding at least one stabilizer selected from the group consisting of specific compounds having a sulfonates group sulfonic acid anhydride group or a sulfate group in an amount of 0.01 to 500 ppm of a polycarbonate to be formed, to form a polycarbonate having a desired intrinsic viscosity.

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