Pigment preparations based on dioxazines
View Patent ↗The invention relates to a pigment preparation characterized by a content of a) a dioxazine compound of Formula (I) as the basic pigment; and b) a dioxazine compound of the general Formula (II) as a pigment dispersing agent Q-[Y—X] m (II), wherein Q represents an m-valent group of the basic pigment of Formula (I), Y represents —(CR 1 R 2 ) x— , in which X is 1 to 6, and R and R 2 independently of one another represent hydrogen or C1 to C4 alkyl, X represents an imidazole group which is linked via a carbon atom to the Y bridging element, m has a numerical value between 1 and 4; and c) a resin component from the group of abietic acid, dehydroabietic acid, dihydroabietic acid tetrahydroabietic acid, levopimaric acid, dextropimaric acid, isodextropimaric acid, colophony resin, partially hydrogenated colophony resin, resin soaps of the aforementioned acids, and mixtures thereof.
1. A pigment preparation comprising
a) a dioxazine compound of formula (I) as base pigment
and
b) a dioxazine compound of formula (II) as a pigmentary dispersant
Q-[Y—X] m (II)
wherein
Q is an m-valent residue of the base pigment of formula (I),
Y is (CR 1 R 2 ) x — where x is from 1 to 6 and R 1 and R 2 each independently are hydrogen or C 1 -C 4 -alkyl,
X is an imidazole radical attached to the bridge member Y via a carbon atom,
m is a numerical value between 1 and 4,
and
c) a resin component selected from the group consisting of abietic acid, dehydroabietic acid, dihydroabietic acid, tetrahydroabietic acid, laevopimaric acid, dextropimaric acid, isodextropimaric acid, rosin, partially hydrogenated rosin, resin soaps of the acids of abietic acid, dehydroabietic acid, dihydroabietic acid, tetrahydroabietic acid, laevopimaric acid, dextropimaric acid, isodextropimaric acid and mixtures thereof.
2. The pigment preparation as claimed in claim 1 , wherein
Y is methylene, ethylene or propylene,
X is imidazolyl attached to the bridge member Y via position 5, and
m is a number from 1 to 2.5.
3. The pigment preparation as claimed in claim 1 , comprising a pigmentary dispersant of formula (III)
wherein
Q is as defined in claim 1 , and
m is a numerical value from 1 to 2.5.
4. The pigment preparation as claimed in claim 1 , comprising
a) 50% to 99.7% by weight of a base pigment of formula I,
b) 0.1% to 30% by weight of a pigmentary dispersant of formula II or III,
c) 0.1% to 30% by weight of the resin component, all based on the overall weight of the pigment preparation.
5. The pigment preparation as claimed in claim 1 , comprising
a) 80% to 99.7% by weight of a base pigment of formula I,
b) 0.1% to 10% by weight of a pigmentary dispersant of formula II or III,
c) 0.1% to 10% by weight of the resin component, all based on the overall weight of the pigment preparation.
6. A process for producing a pigment preparation as claimed in claim 1 , comprising the step admixing C.I. Pigment Violet 23 of formula (I) with the pigmentary dispersant of formula (II) and the resin component before or during a conversion into a fine state of subdivision or immediately before or during a conditioning treatment.
7. A pigmented macromolecular organic materials of natural or synthetic origin comprising a pigment preparation as claimed in claim 1 .
8. The pigmented macromolecular organic materials of natural or synthetic origin as claimed in claim 7 , wherein the pigmented macromolecular organic materials of natural or synthetic origin are plastics, resins, coatings, paints, electrophotographic toners, electrophotographic developers, color filters or liquid inks.
9. An inkjet ink or printing ink comprising a pigment preparation as claimed in claim 1 .
10. A printing ink concentrate comprising 15% to 25% by weight of the pigment preparation as claimed in claim 1 .