Patent ID: 7491836

Claim:
A compound of the formula (I) wherein: R 1 is H or C 1 -C 4 alkyl; R 2 is a C 14 to C 22 acyl, alkyl or alkenyl group, wherein the acyl, alkyl or alkenyl group is linear or branched, and is optionally substituted with one or more substituents independently selected from the group consisting of: halogen, cyano, carboxy, carbamoyl, carbarnoyl(C 1 -C 4 )alkyl, fluoromethyl, difluoromethyl, trifluoromethyl, mercapto, nitro, amino, (C 1 -C 4 )alkylamino, phenyl, naphthyl, phenyloxy, naphthyloxy, (C 1 -C 4 )alkylthio, and (C 1 -C 4 )alkylsulfinyl; R 3 is ethylene, propylene, or branched propylene; x is 2-18; y is 1-17; the sum of (x+y) is 3-19; and z is 25-455.