Patent ID: 6194493
Filing Date: 2001-02-27
Classification: C08K

Abstract:
A method of stabilizing an organic material against the degradation caused by light, radiation, heat and oxygen, comprising adding a stabilizing amount of a compound of the formula (I) ##STR4##whereR.sup.1 to R.sup.5 independently of on another are halogen, H, NO.sub.2, CH.sub.3, CN; C.sub.1 -C.sub.20 -alkyl, --S-alkyl or --O-alkyl; C.sub.6 -C.sub.14 -aryl, --S-aryl or --O-aryl; C.sub.5 -C.sub.13 -heteroaryl; C.sub.7 -C.sub.26 -alkylaryl, --S-alkylaryl or --O-alkylaryl,R.sup.6 is --O-- or --N(R.sup.8)--, where R.sup.8 is hydrogen or C.sub.1 -C.sub.12 -alkyl,R.sup.7 is H, C.sub.1 -C.sub.30 -alkyl, C.sub.3 -C.sub.12 -cycloalkyl; C.sub.6 -C.sub.14 -aryl which is unsubstituted or substituted by halogen, NO.sub.2, CF.sub.3, O--C.sub.1 -C.sub.20 -alkyl, O--C.sub.6 -C.sub.14 -aryl or O--C.sub.7 -C.sub.26 -arylalkyl; C.sub.7 -C.sub.30 -arylalkyl which is unsubstituted or substituted by halogen, NO.sub.2, CF.sub.3, O--C.sub.1 -C.sub.20 -alkyl, O--C.sub.6 -C.sub.14 -aryl or O--C.sub.7 C.sub.26 -arylalkyl; or is a heteroaromatic radical having 5-15 carbon atoms, to the material to be stabilized.