Patent ID: 6890360

Claim:
A chemical composition comprising: (a) a first component comprising one or more fluorochemical urethane compounds comprising the reaction product of: (1) one or more polyfunctional isocyanate compounds; (2) one or more hydrophilic polyoxyalkylene compounds; (3) one or more silane compounds of the formula: X—R 1 —Si—(Y) 3 wherein X is —NH 2 ; —SH; —OH; —N═C═O; or —NRH where R is selected from the group consisting of phenyl, straight and branched aliphatic, alicylic, and aliphatic ester groups; R 1 is an alkylene, heteroalkylene, aralkylene, or heteroaralkylene group; and each Y is independently a hydroxyl; a hydrolyzable moiety selected from the group consisting of alkoxy, acyloxy, heteroalkoxy, heteroacyloxy, halo, and oxime; or a non-hydrolyzable moiety selected from the group consisting of phenyl, alicyclic, straight-chain aliphatic, and branched-chain aliphatic, wherein at least one Y is a hydrolyzable moiety; and (4) one or more fluorochemical monofunctional compound; and (b) a second component comprising one or more hydrophilic auxiliary compounds capable of further improving the oil- and/or water repellency or soil/stain release properties of a fibrous substrate treated with the fluorochemical urethane compounds; wherein said auxiliary compounds of said second component are selected from the group consisting of: i) the reaction product of a polyisocyanate a blocking agent and a polyoxyalkylene compound, ii) hydrophilic carbodiimides, and iii) hydrophilic polymers of acrylic and/or methacrylic acid.