申请人:Mitsubishi Petrochemical Company Limited
公开号:US05260443A1
公开(公告)日:1993-11-09
Disclosed is a piperidine derivatives of a formula: ##STR1## wherein R.sup.0 indicates a hydrogen atom or a group R--CO).sub.n where R is an alkyl, alkylene or arylene group capable of having 1 to 4 carboxylic group; R.sup.1 indicates a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an acyl group having 2 to 7 carbon atoms, or an arylalkyl group having 7 to 10 carbon atoms; R.sup.2 and R.sup.2' respectively indicate a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms; R.sup.3 and R.sup.4 in combination indicate a group .dbd.CH--R.sup.5, or R.sup.3 indicates a hydrogen atom and R.sup.4 indicates either --CH.sub.2 --R.sup.5 wherein R.sup.5 is a substituted or non-substituted phenyl group or a substituted or non-substituted cyclohexyl group the substituent being an alkyl having 1 to 4 carbon atoms, or a 2-furyl group or a tetrahydrofuryl group; and n indicates an integer of 1 to 4. The piperidine derivatives are improved photostabilizer to various organic materials including poly-.alpha.-olefins with least breeding out tendency.
本发明揭示了一种吡啶基衍生物,其化学式为:##STR1## 其中R.sup.0表示氢原子或R-CO).sub.n基团,其中R是一种能够具有1至4个羧基的烷基、烷基烯或芳基基团;R.sup.1表示氢原子、具有1至4个碳原子的烷基基团、具有2至7个碳原子的酰基基团或具有7至10个碳原子的芳基烷基基团;R.sup.2和R.sup.2'分别表示氢原子或具有1至4个碳原子的烷基基团;R.sup.3和R.sup.4组合表示.dbd.CH--R.sup.5基团,或R.sup.3表示氢原子且R.sup.4表示--CH.sub.2 --R.sup.5,其中R.sup.5是取代或未取代的苯基团或取代或未取代的环己基团,其取代基团是具有1至4个碳原子的烷基基团、2-呋喃基团或四氢呋喃基团;n表示1至4的整数。该吡啶基衍生物是各种有机材料的改良光稳定剂,包括具有最小繁殖倾向的聚α-烯烃。