| abstract |
In a composition in the form of a multi-emulsion with X / O / A structure where X is a hydrophilic liquid which does not mix with oil, O is an oil phase and A is a water phase:n n n A1) A bifunctional alkylamide (per) fluoropolyether derivative having the following formula in a weight ratio of 0.01% to 10%:n n n R'-NH-C (O) -CF 2 OR f -CF 2 -C (O) -NH-R (I)n n n here,n n n R and R 'are the same or different and are C 13 -C 20 linear or branched alkyl chains;n n n R f represents a (per) fluoropolyether chain comprising repeating units selected from:n n n a)-(C 3 F 6 O)-;n n n b)-(CF 2 CF 2 O)-;n n n c)-(CFL 0 O)-, where L 0 = -F, -CF 3 ;n n n d) -CF 2 (CF 2 ) Z ' CF 2 O-, wherein Z' is 1 or 2;n n n e) -CH 2 CF 2 CF 2 O-;n n n The number average molecular weight of R f is from about 500 to about 5,000; Andn n n B) a weight ratio comprising an acrylic monomer, expanding in water, characterized by the presence of acid groups and hydrophobic groups, and having an emulsifying activity after neutralization of the base of the acid groups with a weight ratio of 0.1% to 0.5%. Copolymer;n n n A composition in the form of a multi-emulsion, wherein the pH of the composition comprises at least 5.n n n Emulsion, Perfluoropolyether, Waterproof |