Purification process of thermoprocessable...

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

2006-03-21

2006-03-21

Richter, Johann (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C570S138000, C570S178000, C570S179000, C570S180000

Reexamination Certificate

active

07015368

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.

REFERENCES:
patent: 4864006 (1989-09-01), Giannetti et al.
patent: 4990283 (1991-02-01), Visca et al.
patent: 0 969 027 (2000-05-01), None

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