Pigment preparations
AssigneeLANXESS Deutschland GmbH
InventorsFrank Linke, Lars May, Sabine Endert, Hans-Ulrich Borst
Life of this patent
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Abstract
The present invention relates to new pigment preparations based on metal azo pigments and aliphatic C10-22 monocarboxylic acids, to processes for their production and their use as a yellow pigment for colouring plastics, and to the use of aliphatic C10-22 monocarboxylic acids for improving the filtration properties of pigment preparations with at the same time improved colour strengths.
Claims21
A pigment preparation composed of
- i) a metal azo pigment A) containing
- a) at least two metal azo compounds of formula (I) which differ at least in the metal ion Me, or their tautomeric forms,
- wherein
- R1 and R2 are each independently OH, NH2 or NHR5,
- R3 and R4 are each independently O or NR5,
- R5 is hydrogen or alkyl, and
- Me is metal ions comprising a metal ion Me1 in the first metal azo compound and a metal ion Me2 in the second metal azo compound,
- wherein
- Me1 is Zn2+ and Ni2+ and the molar ratio of Zn to Ni metal ions is 97:3 to 3:97, and
- Me2 is Al3+2/3, Fe2+, Fe3+2/3, Co2+, Co3+2/3, La3+2/3, Ce3+2/3, Pr3+2/3−, Nd2+, Nd3+2/3, Sm2+, Sm3+2/3, Eu2+, Eu3+2/3, Gd3+2/3, Tb3+2/3, Dy3+2/3, Ho3+2/3, Yb2+, Yb3+2/3, Er3+2/3, Tm3+2/3, Mg2+, Ca2+, Sr2+, Mn2+, Y3+2/3, Sc3+2/3, Ti2+, Ti3+2/3, Nb3+2/3, Mo2+, Mo3+2/3, V2+, V3+2/3, Zr2+, Zr3+2/3, Cd2+, Cr3+2/3, Pb2+ or Ba2+,
- with the proviso that the amount of metal ions Me1 is in total 97 to 100 mol % and the amount of metal ions selected from the Me2 series is in total 0 to 3 mol %, based in each case on one mole of all compounds of formula (I), and
- b) at least one compound of formula (II)
- wherein
- R6 is in each case independently hydrogen or alkyl, which is optionally substituted one or more times by OH,
- or a reaction product of (I) with (II),
- and
- (ii) 100 to 250 g of at least one aliphatic C10-22 monocarboxylic acid B) per mole of all metal azo compounds (I) contained in the metal azo pigment A).
A method of improving the filter pressure value FPV to be determined by the pressure filter test according to DIN EN ISO 23900-5:2019-01 and the colour strength to be determined according to DIN 55986 of a pigment preparation, comprising the step of adding at least one aliphatic C10-22 monocarboxylic acid B) to a metal azo pigment A), wherein the metal azo pigment A) is composed of
- a) at least two metal azo compounds of formula (I) which differ at least in the metal ion Me, or their tautomeric forms,
- wherein
- R1 and R2 are each independently OH, NH2 or NHR5,
- R3 and R4 are each independently O or NR5,
- R5 is hydrogen or alkyl, and
- Me is metal ions comprising a metal ion Me1 in the first metal azo compound and a metal ion Me2 in the second metal azo compound,
- wherein
- Me1 is Zn2+ and Ni2+ and the molar ratio of Zn to Ni metal ions is 97:3 to 3:97, and
- Me2 is Al3+2/3, Fe2+, Fe3+2/3, Co2+, Co3+2/3, La3+2/3, Ce3+2/3, Pr3+2/3−, Nd2+, Nd3+2/3, Sm2+, Sm3+2/3, Eu2+, Eu3+2/3, Gd3+2/3, Tb3+2/3, Dy3+2/3, Ho3+2/3, Yb2+, Yb3+2/3, Er3+2/3, Tm3+2/3, Mg2+, Ca2+, Sr2+, Mn2+, Y3+2/3, Sc3+2/3, Ti2+, Ti3+2/3, Nb3+2/3, Mo2+, Mo3+2/3, V2+, V3+2/3, Zr2+, Zr3+2/3, Cd2+, Cr3+2/3, Pb2+ or Ba2+,
- with the proviso that the amount of metal ions Me1 is in total 97 to 100 mol % and the amount of metal ions selected from the Me2 series is in total 0 to 3 mol %, based in each case on one mole of all compounds of formula (I), and
- b) at least one compound of formula (II)
- wherein
- R6 is in each case independently hydrogen or alkyl, which is optionally substituted one or more times by OH,
- or alternatively a reaction product of (I) with (II),
- wherein 100 to 250 g of the aliphatic C10-22 monocarboxylic acid B) are used per mole of the at least two metal azo compounds of formula (I) contained in the metal azo pigment A).
-26. (canceled)
Dependencies are inferred from the claim text.