Process for preparing polycarbonates

Details Process for preparing polycarbonates Process for preparing polycarbonates

Filed on

1973-10-24

Date issued

1976-01-06

Examiner

Briggs, Sr., Wilbert J.

Patent Class

Chemistry of carbon compounds

SubClass

Miscellaneous organic carbon compounds

Other Related Categories

260 49, 260463, C08G 6362

Type

Patent

Status

active

Patent number

039311082

Description

ABSTRACT:
Extruded films having reduced proneness to stress-cracking, good resistance to casting resins of unsaturated polyesters and no blocking effect and produced from branched aromatic polycarbonates which are the reaction products of aromatic dihydroxy compounds and branching agents having more than three phenolic hydroxyl groups, with polycarbonate precursors. The films are useful as insulating films in the electrical industry.

REFERENCES:
patent: 3646102 (1972-02-01), Kobayashi et al.
patent: R27682 (1973-06-01), Schnell et al.

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