申请人:ELF ATOCHEM NORTH AMERICA, INC.
公开号:EP0467344A1
公开(公告)日:1992-01-22
New and novel carboxylic acid hydrazides bearing a 2,2,6,6-tetra-alkyl-4-piperidine ring and new and novel polymeric compositions stabilized therewith are provided. The novel compounds which contain a light stabilizing group and a reactive hydrazide functionality in the same molecule are prepared by hydrazinolysis of the ester group of an intermediate carboxylic acid ester which contains the 2,2,6,6-tetralkylpiperidine moiety.
本发明提供了含有 2,2,6,6-四烷基-4-哌啶环的新型羧酸酰肼以及用其稳定的新型聚合物组合物。这些新型化合物在同一分子中含有光稳定基团和活性酰肼官能团,其制备方法是对含有 2,2,6,6- 四烷基哌啶分子的中间羧酸酯的酯基进行酰肼水解。