PERFLUORINATED TELOMERS FOR OIL AND WATER PROOFING

摘要

The present invention relates to new fluorinated products resulting from the reaction of: (a) one molecule of one or more acids of the formula: HS - A (COOH)n (I) and of (b) one to five molecules of one or more compounds possessing at least one ethylenic bond, at least one of these compounds corresponding to the general formula: IMAGE (II) and possibly neutralized or partially neutralized with an inorganic or organic base. In the formulae (I) and (II), A represents an aliphatic or aromatic hydrocarbon radical, n is a whole number from 1 to 4, Rf represents a straight or branched perfluorinated chain containing 1 to 20 carbon atoms, B represents bivalent, possibly branched, chaining and may comprise sulfur, oxygen or nitrogen atoms, one of the symbols R represents a hydrogen atom and the other a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms. These products, applied to substrate materials, confer upon these an oilproofing and waterproofing effect as well as a resistance to aggressive products or solvents.