Process for the preparation of low fuming fluoropolymer

Details Process for the preparation of low fuming fluoropolymer Process for the preparation of low fuming fluoropolymer

2007-05-01

2007-05-01

Wu, David W. (Department: 1713)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S199000, C525S326400, C526S252000, C526S254000

Reexamination Certificate

active

10836434

ABSTRACT:
The present invention relates to the reduction of oligomer content of melt-processible fluoropolymer so that the fluoropolymer has at least 25 ppm less oligomer than the as-polymerized fluoropolymer, the reduction being obtained by melting the fluoropolymer forming a surface of molten fluoropolymer and regenerating this surface, contacting the regenerating surface with inert gas, and devolatilizing the resultant molten fluoropolymer.

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William C. Seidel, et al., Chemical, Physical, and Toxicological Characterization of Fumes Produced by Heating Tetrafluoroethene Homopolymer and Its Copolymers with Hexafluoropropene and Perfluoro(Propyl Vinyl Ether), Chem. Res. Toxicol., 1991, 4, pp. 229-236.

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