Patent ID: 8636993

Claim:
A water-in-oil emulsion comprising: a vinyl polymer having a pKa of less than 4 comprising anionic group-containing side chains and alkoxy-containing side chains, wherein the alkyl group of the alkoxy-containing side chain has at least 4 carbon atoms on average in a cyclic, branched-, or straight-chain configuration; an oil phase; and a water phase; wherein the vinyl polymer is the reaction product of at least two different monomers; and wherein the alkoxy-containing side chains are derived from at least one monomer selected from a first class of monomers consisting of monoethylenically unsaturated alkyl (meth)acrylic monomers having at least 4 carbon atoms on average having the formula wherein R 1 is hydrogen or methyl, and R 2 is the alkyl group having at least 4 carbon atoms on average, and wherein the monomers selected from the first class of monomers are present in an amount of at least about 60 wt-%, based on the total weight of the polymerizable composition.