Water-based ink for ink-jet recording, ink cartridge, ink-jet recording apparatus, and ink-jet recording method
A water-based ink for ink-jet recording includes a self-dispersible pigment modified with carboxylic acid group; water; di-2-ethylhexyl sulfosuccinic acid or salt thereof; and a compound represented by the following general formula (1):
1. A water-based ink for ink-jet recording, comprising:
a self-dispersible pigment modified with carboxylic acid group;
water;
di-2-ethylhexyl sulfosuccinic acid or salt thereof; and
a compound represented by the following general formula (1):
wherein in the general formula (1);
R represents a hydrogen atom, or a substituted or unsubstituted alkyl group which is a straight chain alkyl group or a branched chain alkyl group;
A represents an anion group; and
X represents H + or alkali metal ion.
2. The water-based ink for ink-jet recording according to claim 1 , wherein A is sulfonic acid anion group in the general formula (1).
3. The water-based ink for ink-jet recording according to claim 1 , wherein a weight ratio of the compound represented by the general formula (1) to the di-2-ethylhexyl sulfosuccinic acid or salt thereof is in a range of 0.07/1 to 0.5/1.
4. The water-based ink for ink-jet recording according to claim 1 , wherein a weight ratio of the di-2-ethylhexyl sulfosuccinic acid or salt thereof to the self-dispersible pigment modified with carboxylic acid group is in a range of 0.09/1 to 0.35/1.
5. The water-based ink for ink-jet recording according to claim 1 , wherein R is the straight chain alkyl group having 8 to 12 carbon atoms in the general formula (1).
6. The water-based ink for ink-jet recording according to claim 1 , wherein the di-2-ethylhexyl sulfosuccinic acid or salt thereof is sodium di-2-ethylhexyl sulfosuccinate.
7. The water-based ink for ink-jet recording according to claim 1 , wherein the compound represented by the general formula (1) is at least one selected from the group consisting of sodium benzenesulfonate, sodium benzoate, p-toluenesulfonic acid, octylbenzenesulfonic acid, and sodium dodecylbenzenesulfonate.
8. The water-based ink for ink-jet recording according to claim 1 , wherein the compound represented by the general formula (1) is at least one of octylbenzenesulfonic acid and sodium dodecylbenzenesulfonate.
9. The water-based ink for ink-jet recording according to claim 1 , wherein the compound represented by the general formula (1) is octylbenzenesulfonic acid.
10. The water-based ink for ink-jet recording according to claim 1 , wherein the compound represented by the general formula (1) is sodium dodecylbenzenesulfonate.
11. The water-based ink for ink-jet recording according to claim 1 , wherein the di-2-ethylhexyl sulfosuccinic acid or salt thereof is contained by 0.1% by weight to 5% by weight in the water-based ink.
12. The water-based ink for ink-jet recording according to claim 1 , wherein the compound represented by the general formula (1) is contained by 0.01% by weight to 5% by weight in the water-based ink.
13. The water-based ink for ink-jet recording according to claim 1 , wherein the self-dispersible pigment modified with carboxylic acid group is self-dispersible carbon black modified with carboxylic acid group.
14. The water-based ink for ink-jet recording according to claim 1 , wherein only the self-dispersible pigment modified with carboxylic acid group is substantially contained as a colorant in the water-based ink.
15. An ink cartridge comprising the water-based ink for ink-jet recording as defined in claim 1 .
16. An ink-jet recording apparatus comprising:
the water-based ink for ink-jet recording as defined in claim 1 ;
an ink accommodating unit which accommodates therein the water-based ink; and
ink discharge mechanism which discharges the water-based ink accommodated in the ink accommodating unit.
17. An ink-jet recording method comprising:
preparing a recording medium; and
discharging the water-based ink as defined in claim 1 onto the recording medium in accordance with an ink-jet system.
18. A water-based ink for ink-jet recording, comprising:
carbon black modified with carboxylic acid group;
water;
sodium di-2-ethylhexyl sulfosuccinate; and
at least one of octylbenzenesulfonic acid and sodium dodecylbenzenesulfonate, wherein:
a weight ratio of octylbenzenesulfonic acid or sodium dodecylbenzenesulfonate to sodium di-2-ethylhexyl sulfosuccinate is in a range of 0.07/1 to 0.5/1; and
a weight ratio of sodium di-2-ethylhexyl sulfosuccinate to the carbon black modified with carboxylic acid group is in a range of 0.09/1 to 0.35/1.