Tetrafluoroethylene polymer dispersions stabilized with aliphatic non-ionic surfactants

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United States of America Patent

PATENT NO 11193037
APP PUB NO 20160347966A1
SERIAL NO

15115235

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Abstract

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An aqueous dispersion comprising a tetrafluoroethylene core-shell polymer and at least one surfactant corresponding to the general formula R10-[CH2CH20]n[R20]m-R3 wherein R1 represents a linear or branched aliphatic hydrocarbon group having at least 8 carbon atoms, preferably 8 to 18 carbon atoms, R2 represents an alkylene having 3 carbon atoms, R3 represents hydrogen, a C1-C3 alkyl group, or a C1-C3 hydroxyalkyl group, n has a value of 0 to 40, m has a value of 0 to 40 and the sum of n+m is at least 2, wherein the dispersion is free of fluorinated emulsifiers or contains them in an amount of less than 50 ppm based on the weight of the dispersion and wherein the core-shell polymer contains an outer shell of tetrafluoroethylene homopolymer. Further provided are methods of making the dispersions, coating compositions comprising the dispersions and article coated by the coating composition.

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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
Dadalas, Michael C Eggenfelden, DE 39 609
Hintzer, Klaus Kastl, DE 257 2983
Kurz, Arnd Neuss, DE 1 3
Lochhaas, Kai Helmut Neuötting, DE 28 467
Zipplies, Tilman C Burghausen, DE 75 321

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