Method for preparing polycarbonate of controlled molecular weigh

Details Method for preparing polycarbonate of controlled molecular weigh Method for preparing polycarbonate of controlled molecular weigh

1987-05-07

1988-05-10

Anderson, Harold D.

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

Synthetic resins

From reactant having a halogen atom or oxygen single bonded...

528370, 528372, C08G 6362

Patent

active

047436760

ABSTRACT:
Linear polycarbonates of controlled molecular weight are prepared by first reacting a bischloroformate composition with a monohydroxyaromatic compound in a system comprising water, a base and a suitable organic liquid, and then converting the resulting partially capped bischloroformate composition to linear polycarbonate by contact with an interfacial polycarbonate formation catalyst in an alkaline medium. By this method, the efficiency of the capping agent is improved.

REFERENCES:
patent: 3046255 (1962-07-01), Strain et al.

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