2-Propenoic acid, polymer with butyl 2-propenoate, N-(hydroxymethyl)-2-propenamide, 2-propenamide and 2-propenenitrile 67893-23-6 Butyl 2-propenoate, 2-propenenitrile, 2-propenoic acid, 2-propenamide, N-(hydroxymethyl)-2-propenamide polymer