Polymethacryloyl 2

2

6

6-tetramethylpiperidine and polyacryloyl 2

2

6

6-tetra-methylpiperidine and copolymers of styreneacryloyl 2

2

6

6-tetramethylpiperidine were preprared. Corresponding polymeric nitroxyls were obtained by .oxidation of these polymers containing tetramethylpiperdine. When these polymeric nitroxyls used as inhibitor in the synthetic process of unsaturated ester

allylmethacrylate and glycol bis-roethacrylate were prepared with high yield.