Process for the manufacture of polytetrafluoroethylene

Details Process for the manufacture of polytetrafluoroethylene Process for the manufacture of polytetrafluoroethylene

1981-04-24

1983-05-17

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

524546, 526255, 528488, 528489, 528490, C08F 200, C08F 1418

Patent

active

043840922

ABSTRACT:
A treatment procedure for aqueous colloidal polytetrafluoroethylene dispersions obtained by polymerization of tetrafluoroethylene in the presence of the lithium salt of a perfluoroalkanesulfonic acid as the emulsifier, characterized by the fact that a basic hydroxide or a soluble ammonium, alkali metal or alkaline-earth salt, with the exception of lithium hydroxide or a lithium salt, is added to the dispersion.

REFERENCES:
patent: 2559751 (1951-07-01), Berry et al.
patent: 3345317 (1967-10-01), Hoashi
patent: 3419900 (1968-12-01), Elmore et al.
patent: 4025709 (1977-05-01), Blaise et al.

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