| abstract |
There are described compounds of formula A wherein r1 and r2 are each independently of the other 0 or 1; Y1 to Y9 are each independently of the others -H, -OH, C1-C20alkyl, C4-C20cycloalkyl, C2-C20-alkenyl, C1-C20alkoxy, C4-C12cycloalkoxy, C2-C20alkenyloxy, C7-C20aralkyl, halogen, -C 3BOND N, C1-C5haloalkyl, -SO2R', -SO3H, -SO3M, wherein M is an alkali metal, -COOR', -CONHR', -CONR'R'', -OCOOR', -OCOR', -OCONHR', (meth)acrylamino, (meth)-acryloxy, C6-C12aryl; C6-C12aryl substituted by C1-C12alkyl, C1-C12alkoxy, CN and/or by halogen; C3-C12heteroaryl; C3-C12heteroaryl substituted by C1-C12alkyl, C1-C12alkoxy, CN and/or by halogen; or Q of formula I, and at least one substituent Y1 to Y9 must be Q wherein q is 0 or 1, R is a cyclic radical and R1 and T are as defined in claim 1. The novel compounds are suitable, especially in combination with hindered amines, for the stabilisation of organic material against the damaging action of light, oxygen and heat. |