Patent ID: 8501860

Claim:
An aqueous emulsion, comprising: a) a latex polymer, b) an effective amount of a pH responsive polymer comprising, based on the total weight of monomeric units, (a) from about 25 to about 70 percent by weight acid monomeric units, each independently comprising a carboxylic acid-functional substituent group, (b) from about 30 to about 70 percent by weight nonionic monomeric units, each independently comprising a nonionic substituent group, and (c) from about 0.05 to about 20 percent by weight hydrophobic monomeric units, wherein the hydrophobic monomeric units are derived from a monomer according to structure (VI): wherein: R 3 is H or CH 3 , R 4 is CH 3 , M is an integer from about 10 to about 40; and N is an integer from 1 to M, c) an emulsifier, and d) water.