Patent ID: 7214736
Filing Date: 2007-05-08
Classification: C08G,D06M,Y10T

Abstract:
1. A fluorochemical composition comprising a dispersion of a fluorinated compound, wherein said fluorinated compound comprises the reaction product of a combination of reactants comprising: (i) a fluorinated polyether of the formula: wherein R 1 f represents a perfluorinated alkyl group, n is an integer of 3 to 25, A is a carbonyl group or CH 2 , Q 1 is a chemical bond or an organic divalent or trivalent linking group and T represents a functional group capable of reacting with an isocyanate and k is 1 or 2, wherein the perfluorinated polyether group has a weight average molecular weight of at least 750 g/mol to about 100,000 g/mol; (ii) an isocyanate component selected from a polyisocyanate compound that has at least 3 isocyanate groups or a mixture of polyisocyanate compounds wherein the average number of isocyanate groups per molecule is more than 2; (iii) a non-fluorinated oxime blocking agent, and (iv) optionally one or more co-reactants capable of reacting with an isocyanate group selected from water, a non-fluorinated organic compound and mixtures thereof.