2-Propenoic acid, 2-methyl-, polymer with butyl 2-propenoate, 2-methyl-2-((1-oxo-2-propenyl)amino)-1-propanesulfonic acid and 2-propenenitrile 67953-68-8 Butyl acrylate, acrylonitrile, methacrylic acid, 2-acrylamido-2-methylpropanesulfonic acid polymer