2-Propenoic acid, butyl ester, polymer with ethenyl acetate, 2-hydroxyethyl 2-propenoate and N-(hydroxymethyl)-2-propenamide 67893-21-4 Ethenyl acetate, butyl 2-propenoate, 2-hydroxyethyl 2-propenoate, N-(hydroxymethyl)-2-propenamide polymer