Two novel cyclic-amine monomers, i.e., 3-allyl-5,5-dimethylhydantoin (ADMH) and 7,8-benzo-3 allyl-1,3-diazasprio[4.5]decane-2,4-dione (BADDD) were synthesized with good yields by reacting allyl bromide with 5,5-dimethylhydantoin (DMH) and 7,8-benzo-1,3-diazasprio [4.5]decane-2,4-dione (BDDD), respectively. The synthesized monomers were characterized by FTIR and H-1-NMR spectra, and copolymerized with acrylonitrile (AN), vinyl acetate (VAC), and methyl methacrylate (MMA) in a small monomer ratio of ADMH and BDDD, respectively. The copolymers were characterized by FTIR, H-1-NMR, and DSC studies. The N-halamine derivatives of the corresponding copolymers were found to exhibit high antibacterial activities against Escherichia coli, and the antibacterial properties were durable and regenerable.