Patent ID: 8026289

Claim:
A compound of formula (1): B—X—COCH 2 O—[—C p H 2p O] n —CH 2 CO—X—R a (1) wherein B is M or R a , M is an ionizable hydrogen, ammonium, alkali metal, or alkaline earth metal, p is from about 2 to about 4, n is from about 5 to about 43, each X is independently NR, SCH 2 CH 2 NR, SO 2 NRCH 2 CH 2 NR, or SO 2 CH 2 CH 2 NR, R is hydrogen, or a linear or branched alkyl group C b H (2b+1) wherein b is 1 to about 18, R a is R f (CH 2 CF 2 ) d —(C g H 2g )—; R f (OCF 2 CF 2 ) r —(C g H 2g )—; R f OY—; R f (CH 2 ) h [(CF 2 CF 2 ) i (CH 2 CH 2 ) j ] k- ; R f (C g H 2g )—; or H(C c F 2c )—(C g H 2g )—; Y is CFHCF 2 O(C w H 2w )—; or CF(CF 3 )CONH—(C g H 2g )—; each R f is independently C c F (2c+1) wherein c is 1 to about 6; d is 1 to about 3; g is 1 to about 4; r is 1 to about 4; h is 1 to about 6; w is from about 2 to about 12; and i, j, and k are each independently 1, 2, or 3, or a mixture thereof; provided that the total number of carbon atoms in R f (CH 2 ) h [(CF 2 CF 2 ) i (CH 2 CH 2 ) j ] k — is from about 8 to about 22.