Process for the polymerization of vinylidene fluoride
AssigneeProduits Chimiques Ugine Kuhlmann
InventorsJean Blaise, Edouard Grimaud
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Abstract
A process for the polymerization of vinylidene fluoride H.sub.2 C=CF.sub.2 using a novel class of fluorinated emulsifiers having the general formula: R.sub.f --C.sub.2 H.sub.4 --SO.sub.3 M wherein R.sub.f is a perfluorinated radical having 4 to 10 carbon atoms and M is an alkali metal such as lithium, sodium or potassium or an ammonium radical NH.sub.4.
Claims6
Process for the homopolymerization of vinylidene fluoride or the copolymerization of vinylidene fluoride with less than about 10% by weight based on the vinylidene fluoride of an ethylenically unsaturated comonomer known to be copolymerizable therewith, which comprises polymerizing the vinylidene fluoride alone or together with said comonomer in an aqueous medium in the presence of a peroxide initiator and between about 0.2% and 0.5% based on the weight of the water of a water-soluble salt of a compound corresponding to the formula
- R.sub.f --C.sub.2 H.sub.4 SO.sub.3 H
- in which R.sub.f is a perfluoroalkyl radical containing from 4 to 10 carbon atoms.
Dependencies are inferred from the claim text.