S-triazine UV absorbers substituted by a sulfur-containing moiety

A tris-aryl-s-triazine compound of formula B or C ##STR6## wherein R.sub.1 and R.sub.2 are the same and are --CH.sub.2 CH(OH)CH.sub.2 OR.sub.5,

• R.sub.5 is straight or branched chain alkyl of 1 to 24 carbon atoms, phenyl or said phenyl substituted by one to three halogen, alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 8 carbon atoms or combinations thereof;
• 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 combinations thereof;
• Y is hydrogen or straight or branched chain alkyl of 1 to 6 carbon atoms;
• X is --SR.sub.6, --SOR.sub.6 or --SO.sub.2 R.sub.6, where R.sub.6 is alkyl of 1 to 20 carbon atoms, alkenyl of 3 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or said aryl substituted by one or two alkyl of 1 to 4 carbon atoms;
• and
• L is --S--, --SO--, --SO.sub.2 --, --S--S--, --S--E--S--, --SO--E--SO-- or --SO.sub.2 --E--SO.sub.2 --, where E is alkylene of 2 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms or alkylene interrupted by or terminated by cyclohexylene;
• and
• with the proviso that, when X is --SR.sub.6, --SOR.sub.6 or --SO.sub.2 R.sub.6, R.sub.1 and R.sub.2 can also be the same or different and are hydrogen or straight or branched chain alkyl of 1 to 24 carbon atoms;
• or said alkyl substituted by one to eight halogen, --R.sub.4, --OR.sub.5, --N(R.sub.5).sub.2, --CON(R.sub.5).sub.2, --COOR.sub.5, or --OCOR.sub.5 groups or combinations thereof;
• or said alkyl interrupted by one to eight --O--, --NR.sub.5 --, --CONR.sub.5 --, --COO--, --OCO--, or --CO-- groups or combinations thereof;
• or said alkyl both substituted and interrupted by combinations of the groups mentioned above;
• R.sub.4 is cycloalkyl of 5 to 12 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, phenyl, naphthyl, biphenyl, or said phenyl, said naphthyl or said biphenyl substituted by one to three halogen, alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 8 carbon atoms or combinations thereof;
• 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 combinations thereof;
• and
• R.sub.5 is defined as is R.sub.4, or R.sub.5 is also hydrogen or straight or branched chain alkyl of 1 to 24 carbon atoms.