An aqueous composition comprising polymer particles of one or more aqueous
emulsion copolymer and a homopolymer comprising polymerized units derived
from monomer X, wherein monomer X is selected from polymerizable
derivatives of imidazole, imidazoline, amidine, pyridine, pyrrole,
pyrrolidine, pyrrolidinone, caprolactam, and combinations thereof. Also
disclosed are methods of making and using the compositions.