Dispersing agent from renewable raw materials for binding agent-free pigment preparations
View Patent ↗The invention relates to aqueous, binding agent-free pigment preparations, containing: (A) 1.0-to 75.0 wt. % of at least one organic or inorganic white or colored pigment or a mixture of different organic and inorganic white or colored pigments; (B) 0.01 to 8.0 wt. % of at least one phosphatide of formula (I), wherein R represents a group containing carbon, hydrogen and oxygen atoms and optionally nitrogen and sulfur atoms; 0.01 to 12.0 wt. % of a fatty acid alkanol amide ethoxylate of the formula (II), wherein a represents an integer between 3 and 50, R 3 represents C 7- to C 21- alkyl or -alkenyl; and (G) water.
1. An aqueous, binder-free pigment preparation comprising
(A) 1.0 to 75.0 wt % of at least one organic or inorganic white or chromatic pigment or a mixture of different organic and inorganic white or chromatic pigments,
(B) 0.01 to 8.0 wt % of at least one phosphatide of the formula (I),
in which
R is an aliphatic radical comprising a total of up to 50 atoms selected from the group consisting of carbon, hydrogen, and oxygen atoms, and optionally nitrogen and sulfur atoms,
(C) 0.01 to 12.0 wt % of a fatty acid alkanolamide ethoxylate of the formula (II)
in which
a is an integer from 3 to 50,
R 3 is C 7 to C 21 alkyl or alkenyl,
and
(G) water.
2. The aqueous, binder-free pigment preparation as claimed in claim 1 , wherein component (B) is a phosphatidylcholine of the formula (III)
in which
R 1 is a linear, saturated or unsaturated aliphatic C 8 to C 18 radical and
R 2 is a linear, saturated or unsaturated aliphatic C 8 to C 18 radical identical to or different from R 1 .
3. The aqueous, binder-free pigment preparation as claimed in claim 2 , wherein the radicals R, R 1 CO and R 2 CO are acyl radicals derived from lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, or mixtures thereof.
4. The aqueous, binder-free pigment preparation as claimed in claim 1 , wherein component (C) is a fatty acid alkanolamide ethoxylate of the formula (II),
in which a is an integer from 4 to 50 and R 3 is C 11 to C 19 alkyl or alkenyl.
5. The aqueous, binder-free pigment preparation as claimed in claim 1 , comprising 1 to 7 wt % of a phosphatide of the formula (I).
6. The aqueous, binder-free pigment preparation as claimed in claim 1 , comprising 1 to 10 wt % of a fatty acid alkanolamide ethoxylate of the formula (II).
7. The aqueous, binder-free pigment preparation as claimed in claim 1 , comprising 10 to 75 wt % of water.
8. The aqueous, binder-free pigment preparation as claimed in claim 1 , having a viscosity of 10 to 10 000 mPas, determined with a cone/plate viscometer at a shear rate of 1/60 sec-1.
9. The aqueous, binder-free pigment preparation as claimed in claim 1 , further comprising
(D) 0.01-8.0 wt % of clay mineral thickeners based on natural or alkali-activated montmorillonite phyllosilicate minerals.
10. The aqueous, binder-free pigment preparation as claimed in claim 1 , further comprising
(E) 0.01-20.0 wt % of inorganic fillers.
11. The aqueous, binder-free pigment preparation as claimed in claim 1 , further comprising
(F) 0.01 to 30 wt % of other auxiliaries customary for producing aqueous, binder-free pigment preparations and selected from the group consisting of wetting agents, moisture retainers, solvents, defoamers, rheological additives, preservatives, buffer substances, and pH regulators.
12. The aqueous, binder-free pigment preparation as claimed in claim 11 , comprising up to 15 wt % of at least one moisture retainer or solvent, selected from the group consisting of glycerol and from glycol ethers having 200 to 20 000 g/mol number-average molecular weight.
13. The aqueous, binder-free pigment preparation as claimed in claim 11 , comprising up to 2 wt % of defoamers.
14. The aqueous, binder-free pigment preparation as claimed in claim 11 , comprising up to 1 wt % of an in-can preservative.
15. A process for coloring a macromolecular material, coating material, paint, or ink, comprising the step of adding at least one aqueous, binder-free pigment preparation comprising
(A) 1.0 to 75.0 wt % of at least one organic or inorganic white or chromatic pigment or a mixture of different organic and inorganic white or chromatic pigments,
(B) 0.01 to 8.0 wt % of at least one phosphatide of the formula (I),
in which
R is an aliphatic radical comprising a total of up to 50 atoms selected from the group consisting of carbon, hydrogen, and oxygen atoms, and optionally nitrogen and sulfur atoms,
(C) 0.01 to 12.0 wt % of a fatty acid alkanolamide ethoxylate of the formula (II)
in which
a is an integer from 3 to 50,
R 3 is C 7 to C 21 alkyl or alkenyl,
and
(G) water to the macromolecular material, coating material, paint or ink.
16. A macromolecular material, coating material, paint or ink, comprising at least one aqueous, binder-free pigment preparation as claimed in claim 1 .
17. A process for printing a two-dimensional sheet structure comprising the step of contacting the two-dimensional sheet structure with at least one macromolecular material, coating material, paint or ink, as claimed in claim 16 .