Trisazo compounds useful in producing water-resistant ink compositions
AssigneesTaoka Chemical Co., Ltd., Sumitomo Chemical Company, Limited
InventorsShinjiro Kawasaki, Hideo Kitagawa, Yutaka Nishii, Hideo Kawashita, Minoru Akagi
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Abstract
An azo compound of the formula: ##STR1## wherein R is of the formula: ##STR2## R.sub.1 is hydrogen, methyl or --SO.sub.3 M; R.sub.2 is hydrogen or --SO.sub.3 M; R.sub.2 is hydrogen or --SO.sub.3 M; R.sub.3 is C.sub.4 -C.sub.18 alkyl and M is hydrogen, an alkali metal, ammonium or organic ammonium, provided that when R includes --SO.sub.3 M, R.sub.1 l and R.sub.2 are not --SO.sub.3 M, and when R does not include --SO.sub.3 M, either one of R.sub.1 and R.sub.2 is --SO.sub.3 M, which is useful as a black dyestuff for a solvent type ink composition, particularly for ink jet recording.
Claims13
An azo compound of the formula:
- ##STR32## wherein R is of the formula:
- ##STR33## R.sub.1 is hydrogen, methyl or --SO.sub.3 M;
- R.sub.2 is hydrogen or --SO.sub.3 M;
- R.sub.3 is C.sub.4 -C.sub.18 alkyl and M is hydrogen, an alkali metal, ammonium, monoethanol ammonium, diethanol ammonium, or triethanol ammonium, provided that when R includes --SO.sub.3 M, R.sub.1 and R.sub.2 are not --SO.sub.3 M, and when R does not include --SO.sub.3 M, one of R.sub.1 and R.sub.2 is --SO.sub.3 M.
A solution type composition comprising an azo compound of the formula:
- ##STR36## wherein R is of the formula:
- ##STR37## R.sub.1 is hydrogen, methyl or --SO.sub.3 M;
- R.sub.2 is hydrogen or --SO.sub.3 M;
- R.sub.3 is C.sub.4 -C.sub.18 alkyl and M is hydrogen, an alkali metal, ammonium, monoethanol ammonium, diethanol ammonium or triethanol ammonium, provided that when R includes --SO.sub.3 M, R.sub.1 and R.sub.2 are not --SO.sub.3 M, and when R does not include --SO.sub.3 M, one of R.sub.1 and R.sub.2 is --SO.sub.3 M;
- a hydrophilic solvent and water.
Dependencies are inferred from the claim text.