Metal azo pigments and pigment preparations produced therefrom

Metal azo pigments comprising:

• the adduct of
• a) at least two metal azo compounds of the formula (I) or tautomeric forms thereof
• in which
• R1 and R2 independently of one another are OH, NH2 or NHR5;
• R3 and R4 independently of one another are ═O or ═NR5;
• R5 is hydrogen or alkyl;
• and
• Me is a divalent or trivalent metal ion selected from the group consisting of Ni2+, Zn2+, Cu2+, Al3+2/3, Fe2+, Fe3+2/3, Co2+ and Co3+2/3,
• wherein the amount of metal ions from the series Zn2+ and Ni2+ is 95 to 100 mol % and the amount of metal ions selected from the group consisting of Cu2+, Al3+2/3, Fe2+, Fe3+2/3, Co2+ and Co3+2/3 is 0 to 5 mol %, based in each case on one mole of all of the compounds of the formula (I), and
• where the molar ratio of Zn to Ni metal ions in the sum total of the compounds of the formula (I) is 9:1 to 1:9,
• and
• b) at least one compound of the formula (II)
• in which
• R6 is hydrogen or alkyl, which is optionally substituted by one or more OH groups,
• wherein the X-ray diffractogram with a lattice constant of d=10.3 (±0.2) Å of the metal azo pigment has a signal S1 with an intensity I1 and in the lattice constant range from d=16.05 Å to d=11.78 Å has no signal S2 whose intensity I2 in relation to the intensity I1 of signal S1, expressed as ratio I2/I1 of the background-corrected intensities, exceeds a value of 0.02.