Patent ID: 8022107

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, X is O, S, or SCH 2 CH 2 O, 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 (CH 2 ) h [(CF 2 CF 2 ) i (CH 2 CH 2 ) j ] k- ; or R f OY—; Y is CFHCF 2 O(CH 2 CH 2 O) v- (C 9 H 2 O—; CFHCF 2 O(C w H 2w )—; of 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; 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; v is 1 to about 4; and w is from about 2 to about 12.