| abstract |
The present invention relates to a method for preparing a fluoropolymer comprising an aqueous emulsion polymerization of one or more fluoromonomers, wherein the aqueous emulsion polymerization is carried out in the presence of an oligomer having one or more ionic groups, and the oligomer is partially fluorinated. And having a number average molecular weight of 2000 g / mol or less and a combination of repeating units different from the repeating units of fluoropolymers prepared by polymerization of the one or more fluorinated monomers. Since the polymerization of one or more fluorinated monomers to produce the desired fluoropolymer is carried out in the presence of the oligomer, the resulting dispersion contains the oligomer in addition to the fluoropolymer. Accordingly, in a further aspect, the present invention relates to an aqueous dispersion of a fluoropolymer comprising an oligomer. |