| abstract |
At least one fluorosurfactant is an emulsion polymerization process for the production of non-elastic fluoropolymer used as a dispersant, wherein the fluorosurfactant has the formula X-Rf- (CH 2) n -O-P ( O) (OM) 2 (wherein n is 1 or 2, X = H or F, M = monovalent cation, and Rf is a C 4 -C 6 fluoroalkyl or fluoroalkoxy group) ) Is a fluoroalkyl phosphate ester. Optionally, a second dispersant may be used in the polymerization, and the second dispersant is selected from the group consisting of carboxylic acid, salt thereof, sulfonic acid and salt thereof, phosphoric acid and salt thereof. Perfluoropolyether having at least one terminal group. |