Process for controlling the molecular weight of polycarbonates u

Details Process for controlling the molecular weight of polycarbonates u Process for controlling the molecular weight of polycarbonates u

1976-07-12

1977-11-22

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260463, C08G 6362

Patent

active

040595668

ABSTRACT:
Process for the preparation of aromatic polycarbonates by the interfacial technique wherein the molecular weight is controlled by adding an effective amount of ammonia or ammonium compounds to the polymerization reaction. Examples of suitable compounds effective to control the molecular weight are ammonia, ammonium hydroxide, ammonium sulfite and other ammonium salts.

REFERENCES:
patent: 3028365 (1962-04-01), Schnell et al.
patent: 3215668 (1965-11-01), Rissinger et al.
patent: 3223678 (1965-12-01), Bolgiano

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