A method for imparting resistance to staining to a substrate comprising contacting the substrate with a copolymer comprising the monomers of Formula ##STR00001## 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.sub.1 is independently H, C.sub.1-C.sub.6 alkyl, or C.sub.1-C.sub.6 hydroxyalkyl, each R.sub.2 is independently linear or branched C.sub.1-C.sub.12 alkyl, C.sub.1-C.sub.6 hydroxyalkyl, C.sub.6F.sub.5, arylalkyl, C.sub.6H.sub.4OH, R.sub.3COOH, or R.sub.3SO.sub.3H, or R.sub.1 and R.sub.2 are linked together to form a morpholino or pyrrolidino ring, R.sub.3 is linear or branched C.sub.1-C.sub.12 alkyl, CH(COOH)CH.sub.2CH.sub.2, C.sub.6H.sub.4, or C.sub.6H.sub.3(OH), h.sub.1+h.sub.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.