申请人:Ciba-Geigy Corporation
公开号:US04116933A1
公开(公告)日:1978-09-26
Compounds having the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 are lower alkyl or together lower alkylene, R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl, alkyl substituted benzyl, or acyl, R.sub.4 is alkylene, alkyl-thio-alkyl or alkyl-oxo-alkyl, M is hydrogen or a metal, and z has a value of from 1 to 4, and either (a) R.sub.5 is alkyl of 1 to 6 carbon atoms, R.sub.6 is alkyl of 1 to 6 carbon atoms, and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms, provided that R.sub.7 and R.sub.8 are not both hydrogen, or (b) R.sub.5 and R.sub.6 are together lower alkylene and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms, Are good light stabilizers. The carboxylic acids are prepared for example, from 2,3,6-trimethyl-2,6-diethylpiperidin-4-ol and sebacic acid to give 2,3,6-trimethyl-2,6-diethyl-4-piperidyl hydrogen sebacate. The metal salts of the acids are readily prepared by reacting the acids or their salts with a reactive form of the metal or metal complex.
具有以下结构式的化合物为好的光稳定剂:其中R.sub.1和R.sub.2是较低的烷基或一起形成较低的烷基烯,R.sub.3是氢、烷基、甲氧基乙基、烯烃基、丙炔基、苄基、烷基取代的苄基或酰基,R.sub.4是烷基烯、烷基硫烷基或烷基氧代烷基,M是氢或金属,z的值为1至4,且要么(a) R.sub.5是1至6个碳原子的烷基,R.sub.6是1至6个碳原子的烷基,R.sub.7和R.sub.8分别是氢或1至5个碳原子的烷基,前提是R.sub.7和R.sub.8不同时为氢,或者(b) R.sub.5和R.sub.6一起形成较低的烷基烯,R.sub.7和R.sub.8分别是氢或1至5个碳原子的烷基。这些羧酸可以通过例如从2,3,6-三甲基-2,6-二乙基哌啶-4-醇和癸二酸制备,以得到2,3,6-三甲基-2,6-二乙基-4-哌啶基癸二酸。这些酸的金属盐可以通过将这些酸或它们的盐与金属或金属配合物的反应形成。