WERKWIJZE VOOR HET BEREIDEN VAN EEN 2,2,6,6-TETRAMETHYLPIPERIDINEDERIVAAT, ALSMEDE GEVORMD VOORTBRENGSEL VERVAARDIGD VAN EEN SYNTHETISCH POLYMEER, DAT MET EEN ALDUS VERKREGEN 2,2,6,6-TETRAMETHYLPIPERIDINEDERIVAAT IS GESTABILISEERD.

摘要

New piperidine-spiro-oxirane derivatives having the formula WHEREIN R1 represents hydrogen atom or an alkyl group of one to four carbon atoms and R2 represents an alkyl group of one to eight carbon atoms. These piperidine-spiro-oxirane derivatives are prepared by reacting triacetonamine with a halogenated aliphatic carboxylic acid ester having the formula WHEREIN R1 and R2 are as defined above and X represents a halogen atom in the presence of a base capable of producing carbanion. The present piperidine-spiro-oxirane derivatives show a superior stabilizing activity against photo- and thermo-deterioration of various synthetic polymers, e.g., including polyolefins, polyvinyl chlorides, polyvinylidene chlorides, polyacetals, polyesters, polyamides and polyurethanes and thus they are useful as a stabilizer for preventing said deterioration.