Patent ID: 6221434
Filing Date: 2001-04-24
Classification: B82Y,C08G,C09K

Abstract:
A surface treatment method for imparting oil- and/or water-repellency, comprising the step of applying to the surface to be treated compositions comprising at least one compound having the formula IIIACF.sub.2 O--(CF.sub.2 O).sub.n (C.sub.2 F.sub.4 O).sub.m --CF.sub.2 --B IIIwhere n=1-20, m=1-20 and A and B are reactive functional groups independently selected from the group consisting of:a) CONHR, where R=C.sub.n' H.sub.2n'+1 with n'=1-30,b) CH.sub.2 OH,c) CONH(X).sub.m' SiR.sup.1.sub.n"" (OR.sup.1).sub.3-n"" where n""=0-2, R.sup.1 and R', identical or different, are C.sub.r H.sub.2r+1 alkyl radicals, where r=1-4 and X is CHR"", where m'=1-20, and R"" can be, H or CH.sub.3, optionally containing heteroatoms, andd) --(CH.sub.2 O(R'""O).sub.p).sub.k --P(O)(OH).sub.3-k, where R'"" is an alkylene radical, p=1-10 and k=1, 2,said method being characterized in that said composition (1) comprises said compound at a suitable concentration and (2) is applied in an amount suitable to obtain substantially at least one monolayer of said compound on the surface to be treated, said reactive groups being chosen according to the nature of the surface to be treated so as to provide interaction with the surface to be treated.