2H-Azepin-2-one, 1-ethenylhexahydro-, polymer with N-ethenyl-N-methylacetamide 2H-Azepin-2-one, hexahydro-1-vinyl-, polymer with N-methyl-N-vinylacetamide Acetamide, N-ethenyl-N-methyl-, polymer with 1-ethenylhexahydro-2H-azepin-2-one Acetamide, N-methyl-N-vinyl-, polymer with hexahydro-1-vinyl-2H-azepin-2-one N-Methyl-N-vinylacetamide-N-vinylcaprolactam copolymer N-Vinyl-N-methylacetamide-N-vinyl-ε-caprolactam polymer N-Vinyl-ε-caprolactam-N-vinyl-N-methylacetamide copolymer N-Vinylcaprolactam-N-methyl-N-vinylacetamide copolymer N-Vinylcaprolactam-N-vinyl-N-methylacetamide copolymer