Patent ID: 7550199

Claim:
A method for imparting resistance to staining to a fibrous substrate comprising contacting said fibrous substrate with a copolymer comprising the monomers of Formula I wherein D is at least one vinyl monomer selected from the group consisting of aryl olefin, alpha olefin and diene, each M is independently H, Ca, Mg, Al, Na, or K, each R 1 is independently H, C 1 -C 6 alkyl, or C 1 -C 6 hydroxyalkyl, each R 2 is independently C 6 F 5 , (CH 2 ) m C 6 H 5 , (CH 2 ) n SO 3 H, C 6 H 4 SO 3 H, CH(CH 3 )CH 2 CH 3 , or R 3 COOH wherein m is 1, n is 1 or 2, and R 3 is linear or branched C 1 -C 12 alkyl, or R 1 and R 2 are linked together to form a morpholino or pyrrolidino ring, h 1 +h 2 is h, h is a positive integer, k is zero or a positive integer, i and j are each independently zero or a positive integer, provided that the total of 1) h÷(k+h+i+j) is from about 0.005 to about 0.7, 2) k÷(k+h+i+j) is from about 0.3 to about 0.6, 3) [i+j]÷(k+h+i+j) is 0 to about 0.6, and provided that the sum of 1)+2)+3) is 1.0, said monomers occurring in any sequence.