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US 6,077,339 AGranted
Pigment preparations useful for ink-jet printing
AssigneeBayer Aktiengesellschaft
InventorsRoger Nyssen, Dirk Pfutzenreuter, Rolf Richter, Fritz Puchner, Karin Hassenruck
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for ink-jet printing with a printing ink containing a pigment preparation containing (a) water (b) a dispersing agent, and (c) at least one pigment consisting of a barbituric acid substituted by radicals containing methine or azo groups or a derivative thereof, preferably present as a salt or a complex, a solid solution, an inclusion compound, or an intercalation compound.
Claims18
A method comprising ink-jet printing with a printing ink containing a pigment preparation comprising
- (a) water,
- (b) 0.1 to 100%, based on the amount of pigment (c), of a dispersing agent, and
- (c) at least one pigment having the formula ##STR11## or tautomeric forms thereof, wherein
- B is an isoindoline group having the formula ##STR12## wherein the double bonds are linked respectively through the 1- and 3-positions of the isoindoline group;
- A is a cyanomethylene group having the formula ##STR13## Z.sup.1 to Z.sup.10 are independently O or NR.sup.10 ;
- R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen, alkyl, cycloalkyl, aryl, aralkyl, or heteroaryl;
- R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are independently hydrogen, halogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, or C.sub.6 -C.sub.10 aryloxy;
- R.sup.9 is an electron-withdrawing group;
- and
- R.sup.10 is hydrogen or cyano.
7 more elements
A pigment preparation comprising (a) water;
- (b) a dispersing agent;
- (c) at least one pigment having the formula ##STR25## or tautomeric forms thereof, wherein
- B is an isoindoline group having the formula ##STR26## wherein the double bonds are linked respectively through the 1- and 3-positions of the isoindoline group;
- A is a cyanomethylene group having the formula ##STR27## Z.sup.1 to Z.sup.10 are independently O or NR.sup.10 ;
- R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen, alkyl, cycloalkyl, aryl, aralkyl, or heteroaryl;
- R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are independently hydrogen, halogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, or C.sub.6 -C.sub.10 aryloxy;
- R.sup.9 is an electron-withdrawing group;
- and
- R.sup.10 is hydrogen or cyano;
- and
- (d) at least one organic solvent selected from the group consisting of aliphatic C.sub.1 -C.sub.4 alcohols, aliphatic ketones, polyols, monohydroxy ethers, 2-pyrrolidone, N-methyl-2-pyrrolidone, N-ethylpyrrolidone, N-vinylpyrrolidone, 1,3-dimethylimidazolidone, dimethylacetamide, and dimethylformamide.
8 more elements
Dependencies are inferred from the claim text.