Inverse interfacial polymerization for preparing certain halogen

Details Inverse interfacial polymerization for preparing certain halogen Inverse interfacial polymerization for preparing certain halogen

1976-10-26

1978-01-03

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260DIG24, C08G 6318, C08G 6324, C08G 6368

Patent

active

040666239

ABSTRACT:
The present invention relates to a process for preparing certain halogenated aromatic polyesters by an inverse interfacial polymerization technique. More specifically, the present invention offers a method for substantially reducing the amount of low molecular weight fraction which accompanies the formation of these polyesters when prepared by standard interfacial polymerization techniques by (1) inverting the order of addition of one phase to the other, i.e. by adding the aqueous phase to the organic phase, (2) controlling the rate of addition of the aqueous phase to the organic phase and (3) adding the catalyst to the organic phase prior to the addition of the aqueous phase thereto.

REFERENCES:
patent: 3234167 (1966-02-01), Sweeny

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