Back to results
US 2016/0280923 A1Published application
Metal azo pigments
AssigneeLANXESS Deutschland GmbH
InventorsStephan MICHAELIS, Frank LINKE, Heinz-Josef FUELLMAN, Hans-Ulrich BORST, Sabine ENDERT, Dirk PFUETZENREUTER
Life of this patent
Estimating the term…
Abstract
Yellow metal azo pigments based on adducts of at least two metal azo compounds provide improved dispersion properties and are of excellent suitability for pigmentation of pigment preparations for a broad field of use.
Claims20
A Metal azo pigment comprising adducts of:
- at least two metal azo compounds of the formula (T) which differ at least in the metal ion Me, or tautomeric forms thereof,
- in which
- R1 and R3 are each independently OH, NH2 or NHR5,
- R3 and R4 are each independently ═O or ═NR5,
- R5 is hydrogen or alkyl, preferably C1-C4-alkyl, and
- Me is a di- or trivalent metal ion selected from the group of Ni2+, Zn2+, Cu2+, Al3+2/3, Fe2+, Fe3+2/3, Co2+ and Co3+2/3,
- with the proviso that:
- an amount of metal ions from the group of Cu2+ and Ni2+ is 95 to 100 mol % and the amount of metal ions selected from the group of Zn2+, 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 compounds of the formula (I), and
- the molar ratio of Cu2+ to Ni2+ metal ions in the sum total of the compounds of the formula (I) is 19:1 to 1:19, and
- at least one compound of the formula (II)
- in which R6 is hydrogen or alkyl.
8 more elements
Dependencies are inferred from the claim text.