申请人:Ciba-Geigy Corporation
公开号:US04843159A1
公开(公告)日:1989-06-27
A compound of formula (I) ##STR1## in which R.sub.1 and R.sub.2 are e.g. hydrogen or methyl, R.sub.3 is e.g. a group ##STR2## or a group R.sub.5 X-- with R.sub.5 being e.g. hydrogen, C.sub.1 -C.sub.18 -alkyl or C.sub.3 -C.sub.18 -alkenyl and X being e.g. --O--, --S-- or ##STR3## and R.sub.6 is as defined for R.sub.5, or R.sub.3 represents a 5-membered to 7-membered nitrogen containing heterocyclic group with the free valency on the nitrogen, n is an integer from 2 to 6, and R.sub.4 is a nitrogen containing organic radical of a valency equal to n. The compounds of formula (I) are particularly effective in stabilizing organic material against oxidative, thermal and/or light induced degradation.
化学式(I)的化合物##STR1##其中R.sub.1和R.sub.2例如是氢或甲基,R.sub.3例如是一个基团##STR2##或一个基团R.sub.5 X--,其中R.sub.5例如是氢,C.sub.1 -C.sub.18 -烷基或C.sub.3 -C.sub.18 -烯基,X例如是--O--,--S--或##STR3##,R.sub.6如同R.sub.5的定义,或者R.sub.3表示一个含氮的5-7元杂环基团,氮上的自由价数,n是从2到6的整数,R.sub.4是价数等于n的含氮有机基团。化合物的化学式(I)在稳定有机材料抵抗氧化、热降解和/或光诱导降解方面特别有效。