Fluoropolymers with very low amounts of a fluorinated alkanoic acid or its salts

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United States of America Patent

PATENT NO 12018105
APP PUB NO 20210230328A1
SERIAL NO

17053985

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Abstract

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Method of reducing the amount of a fluorinated acid or its salts from a fluoropolymer, the method comprises: (i) providing a composition containing particles of the fluoropolymer, (ii) contacting the fluoropolymer particles with a treatment composition comprising at least one organic liquid; and, optionally, further comprising (iii) isolating, washing and subjecting the fluoropolymer to drying treatment, and wherein the fluoropolymer contains units derived from tetrafluoroethene (TFE) and is selected from the group of fluoroelastomers and the group of fluoropolymers having a melting point of less than 150° C. Also provided are fluoropolymer and compositions containing such polymers that are essentially free of fluorinated acids and their salts.

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Patent Owner(s)

Patent OwnerAddress
3M INNOVATIVE PROPERTIES COMPANYP O BOX 33427 ST PAUL MN 55133-3427

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hintzer, Klaus Kastl, DE 257 2983
Jochum, Florian D Heidesheim am Rhein, DE 11 17
Koenigsmann, Herbert Burgkirchen, DE 19 263
Schrooten, Jens Muehldorf am Inn, DE 8 27
Weilandt, Karl D Afton, US 16 23
Zipplies, Tilman C Burghausen, DE 75 321

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