| abstract |
A polymerization process in aqueous emulsion of:(I) one or more fluorinated monomers containing at least one ethylene unsaturation;(II) one or more fluorinated monomers, containing sulphonyl groups -SO2F;said process comprising the use of a surfactant having the formula:whereinX is equal to -COO, -SO3;M is selected from H, NH4, alkaline metal;Rf represents a (per)fluoropolyether chain, preferably having number average molecular weight comprised between about 230 and about 1,800. |