Tris-aryl-s-triazines substituted with biphenylyl groups

A composition stabilized against the deleterious effects of actinic radiation which comprises

• (a) a polymer subject to degradation when exposed to actinic radiation, and
• (b) an effective stabilizing amount of a compound of formula I ##STR13## wherein G.sub.1 is a group of the formula ##STR14## G.sub.2 is a group of the formula ##STR15## where q is 0 or 1,
• R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.10 are independently of one another hydrogen, hydroxyl, cyano, alkyl of 1 to 20 carbon atoms, alkoxy of 1 to 20 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, cycloalkyl of 4 to 12 carbon atoms, cycloalkoxy of 4 to 12 carbon atoms, halogen, haloalkyl of one to 5 carbon atoms, sulfonyl, carboxyl, acylamino of 2 to 12 carbon atoms, acyloxy of 2 to 12 carbon atoms, alkoxycarbonyl of 2 to 12 carbon atoms, aminocarbonyl, or R.sub.3 and R.sub.4 together with the phenyl radical to which they are attached, are a cyclic radical interrupted by one or more oxygen or nitrogen atoms,
• E.sub.2 is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms or cycloalkyl of 5 to 12 carbon atoms;
• or said alkyl or cycloalkyl substituted by one to eight halogen, epoxy, glycidyloxy, furyloxy, --E.sub.4, --OE.sub.5, --N(E.sub.5).sub.2, --CON(E.sub.5).sub.2, --COE.sub.5, --COOE.sub.5, --OCOE.sub.5, --OCOC(E.sub.5).dbd.C(E.sub.5).sub.2, --C(E.sub.5).dbd.CCOOE.sub.5, --CN, --NCO, or ##STR16## combination thereof;
• or said alkyl or cycloakyl interrupted by one to six epoxy, --O--, --NE.sub.5 --, --CONE.sub.5 --, --COO--, --OCO--,--CO--, --C(E.sub.5).dbd.C(E.sub.5)COO--, --OCOC(E.sub.5).dbd.C(E.sub.5)--, --(E.sub.5)C.dbd.C(E.sub.5)--, phenylene, or -phenylene-G.sub.3 -phenylene in which G.sub.3 is --O--, --S--, --SO.sub.2 --, --CH.sub.2 --, or --C(CH.sub.3).sub.2 --, or combinations thereof;
• or said alkyl or cycloalkyl both substituted and interrupted by combinations of the groups mentioned above;
• or E.sub.2 is --SO.sub.2 E.sub.3, or --COE.sub.6 ;
• E.sub.4 is aryl of 6 to 10 carbon atoms, or said aryl substituted by one to three halogen alkyl of 1 to 8 carbon atoms, or combinations thereof;
• cycloalkyl of 5 to 12 carbon atoms;
• or phenylalkyl of 7 to 15 carbon atoms, or said phenylalkyl substituted on the phenyl ring by one to three halogen, alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 8 carbon atoms or combination thereof;
• or straight or branched chain alkenyl of 2 to 18 carbon atoms;
• E.sub.5 is defined as E.sub.4, or E.sub.5 is also hydrogen or straight or branched chain alkyl of 1 to 24 carbon atoms or E.sub.5 is a group of the formula ##STR17## where T.sub.1 is hydrogen, oxyl, hydroxyl, alkyl of 1 to 12 carbon atoms, said alkyl substituted by at least one hydroxyl or lower alkoxy, benzyl or alkanoyl of 2 to 18 carbon atoms,
• E.sub.6 is straight or branched chain alkyl of 1 to 18 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, phenyl, alkoxy of 1 to 12 carbon atoms, phenoxy, alkylamino of 1 to 12 carbon atoms, arylamino of 6 to 12 carbon atoms or a group --E.sub.7 COOH or --NH--E.sub.8 --NCO;
• E.sub.7 is alkylene of 2 to 14 carbon atoms or o-phenylene;
• E.sub.8 is alkylene of 2 to 10 carbon atoms, phenylene, tolylene, diphenylenemethane or a group ##STR18## t is 0 to 9;
• and L is straight or branched chain alkylene of 1 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms, alkylene by or interrupted by cyclohexylene or phenylene;
• or L is benzylidene;
• or L is --S--, --S--S--, --S--L.sub.1 --S--, --SO--, --SO.sub.2 --, --SO--L.sub.1 --SO--, --SO.sub.2 --L.sub.1 --SO.sub.2 --, --CH.sub.2 --NH--L.sub.1 --NH--CH.sub.2 -- or ##STR19## where L.sub.1 is alkylene of 2 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms, or alkylene interrupted or terminated by cyclohexylene of 8 to 12 carbon atoms;
• with the proviso that at least one L linkage is attached to the phenyl ring in the 5-position.