Patent ID: 7494511
Filing Date: 2009-02-24
Classification: C08G,C09D,C11D,D06M

Abstract:
1. In a system for imparting surface properties to fibrous substrates employing a composition consisting of a self-emulsifiable or self-dispersible aqueous solution or dispersion of at least one urea linkage-containing alkoxypolyoxyalkylene fluorocarbamate prepared by contacting (a) at least one polyisocyanate which contains at least three isocyanate groups per molecule, (b) at least one fluorochemical reagent which contains per molecule a single functional group which has at least one reactive Zerewitinoff hydrogen atom and at least two carbon atoms each of which contains at least two fluorine atoms, and (c) at least one hydrophilic, water-solvatable reagent which contains per molecule a single functional group which has at least one reactive Zerewitinoff hydrogen atom, and thereafter with (d) water, the equivalent weight of said polyisocyanate and said reagents (b) and (c) being such that said reagents react with 55% to 95% of said isocyanate groups, and water reacts with all of the remaining isocyanate groups, wherein the improvement comprises consists of use of a fluorochemical reagent of the formula F(CF 2 ) a CH 2 CH 2 OH, wherein a is 4, 6, or 8, or mixtures thereof, provided that a is a maximum of 50% of 8, for imparting wicking of moisture, durable hydrophilicity and durable stain release properties to a substrate treated therewith.