Heteroaryl substituted hydroxyphenyltriazine uv-absorbers

The present invention relates to new compounds and, in particular, to new heterocyclic substituted hydroxyphenyltriazine compounds having excellent absorption spectrum characteristics, good resistance to exposure to UV light and excellent thermal stability, and to the use of the new compounds as UV absorbers. The present invention provides compounds having the formula (1) in which each of the radicals R, R, Rand R, independently, represent hydrogen, hydroxy, halogen, C-C-alkyl, C-C-alkoxy, CN or COOR, in which Ris C-C-alkyl and Z represents a heterocyclic residue selected from the 2H-benzo[1,2-d]triazol-2-yl, 2H-naphtho[1,2-d]triazol-2-yl, benzimidazol-2-yl, benzoxazol-2-yl and benzofuran-2-yl moieties, optionally substituted by C-C-alkyl, C-C-alkoxy, halogen or NHCOC-C-alkyl, a process for their preparation, new intermediate benzoxazinones useful for their preparation and use of the compounds of formula (1) as UV-absorbers which have improved absorption spectrum characteristics, superior resistance to exposure to UV light and excellent thermal stability, relative to known triphenyltriazine compounds.