Disclosed is a piperidine derivatives of a formula:
wherein:
R⁰ indicates a hydrogen atom or a group
where R is an alkyl, alkylene or arylene group capable of having 1 to 4 carboxylic group;
R¹ 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;
R² and R²' respectively indicate a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms;
R³ and R⁴ in combination indicate a group =CH-R⁵, or R³ indicates a hydrogen atom and R⁴ indicates either -CH₂-R⁵ wherein R⁵ 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-α-olefins with least breeding out tendency.
公开了一种式中的
哌啶衍
生物:
其中
R⁰ 表示氢原子或基团
其中 R 是烷基、亚烷基或芳基,可具有 1 至 4 个羧基;
R¹ 表示氢原子、具有 1 至 4 个碳原子的烷基、具有 2 至 7 个碳原子的酰基或具有 7 至 10 个碳原子的芳烷基;
R² 和 R²' 分别表示氢原子或具有 1 至 4 个碳原子的烷基;
R³ 和 R⁴ 结合在一起表示基团 =CH-R⁵,或 R³ 表示氢原子,R⁴ 表示-CH₂-R⁵,其中 R⁵ 是取代或未取代的苯基,或取代或未取代的环己基,取代基为具有 1 至 4 个碳原子的烷基,或 2-
呋喃基或
四氢呋喃基;以及
n 表示 1 至 4 的整数。
这些
哌啶衍
生物可改善各种有机材料(包括聚-α-烯烃)的光稳定性,并具有最小的析出倾向。