Process for production of stabilized polycarbonate

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

1995-05-10

1996-01-23

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525462, 524911, 524912, 524157, 524158, C08K 546, C08K 542

Patent

active

054865557

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 either a sulfonate group, a 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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