Method for making cyclic carbonates and polymers therefrom

Details Method for making cyclic carbonates and polymers therefrom Method for making cyclic carbonates and polymers therefrom

1977-06-09

1978-12-12

Milestone, Norma S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D32300

Patent

active

041295749

ABSTRACT:
A method is provided for making cyclic carbonates of 2,2-bis(4-hydroxyphenyl)-1,1-dichloroethylene, such as the cyclic trimer, by effecting the polymerization of the aforementioned bis(4-hydroxyphenyl)dichloroethylene to a linear polycarbonate, and then agitating a solution of the resulting polycarbonate in the presence of a tertiary organic amine. The cyclic carbonates made by the aforementioned process are useful as flame retardants in polycarbonates.

REFERENCES:
patent: 3137706 (1964-06-01), Prochaska
patent: 3155683 (1964-11-01), Moody
patent: 3274214 (1966-09-01), Prochaska

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