Purification process of thermoprocessable...

Details Purification process of thermoprocessable... Purification process of thermoprocessable...

2007-01-02

2007-01-02

Wu, David W. (Department: 1713)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C570S177000, C570S138000, C570S179000, C570S180000, C524S543000, C524S544000, C524S545000

Reexamination Certificate

active

10790680

ABSTRACT:
A purification process of thermoprocessable tetrafluoroethylene (TFE) copolymers comprising the following steps:A) the polymer latex is transformed into gel form, under mechanical stirring, by addition of an acid electrolyte having pH values≦2;B) washing of the polymer gel with aqueous solutions having pH from 1 to 7.

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