Process for the preparation of fluoropolymers and fluoroelastomers in the presence of non-fluorinated sulfonate type hydrocarbon containing surfactants thereof

摘要

The present invention relates to a process for the preparation of a fluoropolymer or fluoroelastomer in an aqueous medium using a non-fluorinated sulfonate type hydrocarbon containing surfactant comprising the steps of: (a) a sulfo containing non-fluorinated hydrocarbon in a polymerization reactor forming an aqueous solution comprising a nate anion type surfactant; (b) pressurizing the reactor with a fluoromonomer to form an aqueous emulsion; (c) initiating polymerization of the fluoromonomer; and (d) propagating the reaction; (e) terminating the reaction after consumption of the desired weight of the fluoromonomer; wherein the non-fluorinated hydrocarbon containing sulfonate type surfactant comprises 18 to 36 carbon atoms, the molecular weight of the fluoropolymer ranges from 1×10 3 to 9×10 8 g/mol, the method comprising: There is no passivation step.