SYNTHESIS AND CHARACTERIZATION OF NEW MONOMERS AND POLYMERS CONTAINING HINDERED PIPERIDINE GROUPS

Two new methacryloyl ureas, yloyl)-3-(2,2,6,6-tetra-methylpiperidin-4- yl)-urea and ryloyl)-1-(2,2,6,6-tetramethyIpiperidin-4-yl)-urea (monom er I and monomer II), were prepared by the addition reaction of 2-meth ylacryloyl 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, thylpiperidin-4-yl)-3-(2-methylacryloyl)- carbamate and thylpiperidin-4-yl)-3-(2-methylacryloyl)-carbamate (mono mer III and monomer IV), were completed by the reaction of 2,2,6,6-tet ramethylpiperidin-4-ol or 1,2,2,6,6-pentamethylpiperidin-4-ol with 2 m ethylacryloyl isocyanate in the presence of dibutyltin dilaurate as ca talyst at 60 degrees C. The four new monomers were homopolymerized, an d 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.