Process for preparing aromatic carbonate polymers

Details Process for preparing aromatic carbonate polymers Process for preparing aromatic carbonate polymers

1974-09-23

1976-11-02

Briggs, Sr., Wilbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 6362

Patent

active

039896722

ABSTRACT:
A process for preparing a polycarbonate having improved resistance to thermal degradation and improved impact resistance by reacting a carbonate precursor such as phosgene with a dihydric phenol such as bisphenol-A in an aqueous medium while adding sufficient alkali metal hydroxide to maintain a pH of between 8.0 and 10.2 during the entire reaction.

REFERENCES:
patent: 2970131 (1961-01-01), Moyer et al.
patent: 3291774 (1966-12-01), Bolgiano

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