Process for production of stabilized polycarbonate

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

1995-05-10

1996-02-27

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524154, 524156, 524158, 524159, 524161, 524166, 528198, C08K 550, C08K 542, C08K 541

Patent

active

054949521

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 sulfanate group and a sulfonic acid anhydride 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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