Patent ID: 8013045

Claim:
A process for mass-colouring high molecular weight material, in which process a compound of formula or a tautomer thereof, is incorporated into the high molecular weight material before or during shaping wherein M 1 is H, ½ M 2 , ⅓ M 3 or NR 4 R 5 R 6 R 7 , M 2 is an alkaline earth or transition metal in oxidation state II or an oxo-metal in oxidation state IV, M 3 is Al (III), a transition metal in oxidation state III or an oxo-metal in oxidation state V, R 1 is H or a non-ionic substituent, R 2 is H or, independently of R 1 , a further non-ionic substituent, R 3 is H, C 1 -C 6 alkyl, CO—C 1 -C 6 alkyl or CO-phenyl, and R 4 , R 5 , R 6 and R 7 are each independently of the others H or phenyl, benzyl or C 1 -C 6 alkyl, which are unsubstituted or substituted by hydroxy or by halogen and in the case of C 3 -C 6 alkyl is uninterrupted or interrupted by O.