MONOAZO COLORANTS FOR MASS-COLOURING OF POLYMERS

摘要

A process for mass-colouring high molecular weight material, in which process a compound of formula (I) or a tautomer thereof, wherein M₁ is H, 1/2 M₂, 1/3 M₃ or NR₄R₅R₆R₇, preferably H, 1/2 M₂ or NR₄R₅R₆R₇, especially H, M₂ is an alkaline earth or transition metal in oxidation state II or an oxo-metal in oxidation state IV, M₃ is Al (III), a transition metal in oxidation state III or an oxo-metal in oxidation state V, R₁ is H or a non-ionic substituent, R₂ is H or, independently of R₁, a further non-ionic substituent, R₃ is H, C₁-C₆alkyl, phenyl, CO-C₁-C₆alkyl or CO-phenyl, preferably H or CO-C₁ -Cealkyl, especially H, and R₄, R₅, R₆ and R₇ are each independently of the others H or phenyl, benzyl or C₁-C₆alkyl, which are unsubstituted or may be substituted by hydroxy or by halogen and in the case of C₃-C₆alkyl is uninterrupted or interrupted by O, is incorporated into the high molecular weight material before or during shaping. The colorations obtained have good light stability and thermal stability, especially in polyolefins.