Patent ID: 8343900

Claim:
A polymer of Formula (I), wherein the polymer has pendant groups as represented within ( ) w of the formula: wherein BB is a polymer backbone wherein the polymer comprises at least one of (a) a polymer derived from monomers comprising: (i) a vinyl aromatic monomer and (ii) a carboxylic monomer or derivatives thereof; (b) a copolymer derived from (i) an α-olefin and (ii) a carboxylic monomer or derivatives thereof; or (c) mixtures thereof; X is a functional group which either (i) contains at least a carbon and at least one oxygen or nitrogen atom or (ii) is an alkylene group with 1 to 5 carbon atoms, connecting the polymer backbone and a branched hydrocarbyl group contained within ( ) y ; w is the number of pendant groups attached to the polymer backbone ranging from 1 to 2000; y is 0, 1, 2 or 3, provided that in at least 1 mol % of the pendant groups, y is not zero; and with the proviso that when y is 0, X is bonded to a terminal group in a manner sufficient to satisfy the valence of X, wherein the terminal group is selected from hydrogen, alkyl, aryl, a metal or ammonium cation, and mixtures thereof; p is an integer in the range of 1 to 15; R′ and R″ are independently linear or branched hydrocarbyl groups, and the combined total number of carbon atoms present in R′ and R″ is at least 12, wherein the polymer has 20% to 100% branched hydrocarbyl groups R′ and R″.