Two new methacryloyl ureas, 1-(2-methylacryloyl)-3-(2,2,6,6-tetra-methylpiperidin-4-yl)-urea and 1-butyl-3-(2-methylacryloyl)-1-(2,2,6,6-tetramethyIpiperidin-4-yl)-urea (monomer I and monomer II), were prepared by the addition reaction of 2-methylacryloyl iso-cyanate with 2,2,6,6-tetramethylpiperidin-4-yl-amine or butyl-(2,2,6,6-tetramethylpiperidin-4-yl)-amine in a molar ratio of 1:1 at low or room temperature. In a similar way, the syntheses of two new methacryloyl carbamates, 1-(2,2,6,6-tetra-methylpiperidin-4-yl)-3-(2-methylacryloyl)-carbamate and 1-(1,2,2,6,6-pentamethylpiperidin-4-yl)-3-(2-methylacryloyl)-carbamate (monomer III and monomer IV), were completed by the reaction of 2,2,6,6-tetramethylpiperidin-4-ol or 1,2,2,6,6-pentamethylpiperidin-4-ol with 2 methylacryloyl isocyanate in the presence of dibutyltin dilaurate as catalyst at 60 degrees C. The four new monomers were homopolymerized, and copolymerized with styrene by AIBN as initiator at 70 degrees C. The structures of the new monomers and their polymers were characterized by FT-IR and NMR spectroscopy and by GPC.