Patent ID: 6383633
Filing Date: 2002-05-07
Classification: C08G,D06M,Y10T

Abstract:
A method of treatment of a substrate comprising the step of contacting said substrate with a fluorochemical composition comprising a polymer derived from polymerization of monomer corresponding to the following general formula (I): wherein:Rf is selected from the group consisting of perfluorinated or partially fluorinated aliphatic groups; L1 and L2 each represent an organic divalent linking group and can be the same or different; L3 represents an organic linking group with a valence of n+1; t is 0 or 1; n is an integer of 2 to 20; A1 and A2 each independently represent a divalent residue obtained by removing two â€”NCO groups from a corresponding diisocyanate, and can be the same or different; X1 and X2 are each independently selected from the group consisting of O, NH and S; B1 represents a hydrophilic residue obtained by removing the groups HX1 and HX2 from a compound HX1â€”B1â€”X2H that comprises a poly(oxyalkylene) group; G represents a free radical polymerizable group; and s is 0 or 1, with the proviso that when s is 0, L2 represents a hydrophilic segment comprising a poly(oxyalkylene) group or said polymer is derived from a copolymerization of a monomer according to formula (I) and a poly(oxyalkylene) group containing monomer.