Patent ID: 7956112

Claim:
An aqueous fluoropolymer dispersion comprising an aqueous medium, fluoropolymer particles, and an amine oxide surfactant of the formula: (R 1 )(R 2 )(R 3 )N→O wherein R 1 is radical of the formula: R 4 —(C═O) a —X—(C═O) b —(CH 2 ) n — wherein R 4 is a saturated or unsaturated, branched or unbranched, cyclic or acyclic, alkyl, hydroxyalkyl, ether or hydroxyether radical having 1 to 20 carbon atoms, X is an O, NH or NR 5 , a and b are 0 or 1 with the proviso that a+b=1, and n is 2-6; wherein R 2 and R 3 are independently selected from saturated or unsaturated, branched or unbranched, cyclic or acyclic, alkyl, hydroxyalkyl, ether or hydroxyether radical having 1 to 10 carbon atoms optionally substituted with halogen; R 5 is selected from saturated or unsaturated, branched or unbranched, cyclic or acyclic, alkyl, hydroxyalkyl, ether or hydroxyether radical having 1 to 10 carbon atoms optionally substituted with halogen or an N-oxylamino group; wherein that R 2 and R 3 may be joined by a chemical bond to form a ring; and wherein the aqueous fluoropolymer dispersion has a pH of greater than about 7.