Compositions: coating or plastic – Coating or plastic compositions – Marking
Patent
1998-12-21
2000-11-07
Klemanski, Helene
Compositions: coating or plastic
Coating or plastic compositions
Marking
534823, 534824, 534829, 534837, C09D 1102, C07C24512, C09B 3108
Patent
active
061430625
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to water-soluble disazo compounds and ink compositions containing the same.
1. Prior Art
Recording with an ink jet printer is one of the typical methods for color recording. For use in ink jet printer, various ink ejecting systems have been developed. These systems are mostly designed to produce ink droplets and make them deposit on a receiving material of various kinds (paper, film, fabric and the like). This type of systems have been growing rapidly in recent years and are expected a wider use in the future due to the fact that not only these ink ejecting systems permit a soundless, silent operation of a printer by keeping a recording head in non-contact with a receiving material, but also facilitate to design a more compact printer operable with a higher speed and more easily applicable to color printing. A color print of an image or character information on the color display of a computer by means of an ink jet printer, is generally expressed by subtractive color mixture of 4 colors consisting of Yellow, Magenta, Cyan and Black. In order to make the reproduction of an image expressed by additive color mixture of colors consisting of R, G and B on a CRT display, etc. with the possible highest fidelity, the hue and the brightness are important factors. And especially, for the black color, full depth of shade is most important. In addition, ink compositions are required to have a good long-term storage stability and to produce a printed image having full depth of shade and excellent color fastness properties such as resistance to water, resistance to light and the like.
Although numerous patent applications including: Japanese Patent Publications Sho 62-37070(1987) and 61-18947(1986); as well as Laid Open Japanese Patent Applications Sho 55-151071(1980), 57-36693(1982) and 62-156177(1987); Hei 1-197580(1989) and 8-245894(1996) have been filed, none of them attained to satisfy completely the demand of this field of art.
2. Problems to be Solved By the Invention
The present invention is directed to water-soluble black disazo compounds, which are highly soluble in water, are stable in long-term storage, produce a printed image having full depth of shade and good color fastness properties to both light and water. The present invention also provides ink compositions containing these disazo compounds.
DISCLOSURE OF INVENTION
The inventors have concentrated on efforts to solve the problems as stated above and have attained the present invention.
More particularly, the present invention provides: or a salt thereof: ##STR2## wherein A is represented by the general formula (2) or the general formula (3): ##STR3## in the formula (1), each of R.sup.1 and R.sup.2 represent independently a hydrogen atom, a C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkanoyl or hydroxy-(C.sub.1 -C.sub.4)alkyl group, or, a phenyl, benzoyl or benzyl group which may be optionally substituted; and m is 1 or 2; hydrogen atom, or, a C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkanoylamino, (C.sub.1 -C.sub.4)alkoxy-(C.sub.2 -C.sub.4)alkanoylamino, (C.sub.1 -C.sub.4)alkoxy-(C.sub.1 -C.sub.4)alkoxy or ureido group: and in the formula (3), R.sup.5 represents a hydrogen atom, or, a C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy group; and n is 0 or 1; lithium salt, sodium salt, potassium salt or ammonium salt represented by the general formula (4): ##STR4## wherein each of X.sup.1 to X.sup.4 represents independently a hydrogen atom, or, a C.sub.1 -C.sub.4 alkyl, hydroxy-(C.sub.1 -C.sub.4)alkyl or hydroxyethoxy-(C.sub.1 -C.sub.4)alkyl group; wherein when A in the general formula (1) is represented by the general formula (2), then m is 2; R.sup.1 and R.sup.2 represent a hydrogen atom; R.sup.3 represents a hydrogen atom, or, a methoxy, ethoxy, propoxy or butoxy group; and R.sup.4 represents a hydrogen atom, or, a methyl, ethyl, propyl, butyl, methoxy, ethoxy, propoxy, butoxy, acetylamino, propionylamino or butyloylamino group; wherein when A in the formula (1) is represe
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Miyazawa Takashi
Shirasaki Yasuo
Tabei Toru
Yamaguchi Isao
Yoshioka Junko
Klemanski Helene
Nippon Kayaku Kabushiki Kaisha
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