Purification process of thermoprocessable tetrafluoroethylene copolymers
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United States of America Patent
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Mar 21, 2006
Grant Date -
May 15, 2003
app pub date -
Jul 26, 2002
filing date -
Jul 26, 2001
priority date (Note) -
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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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