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US 8,025,722 B2Granted
Ink jet ink, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMinako Kawabe, Hiroshi Tomioka
Life of this patent
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Abstract
An ink jet ink is provided which contains at least a coloring material and a water-soluble organic solvent, where the water-soluble organic solvent contains a branched alkanediol having hydroxyl groups at both terminals of its main chain and at least one of a compound represented by the following general formula (1) and a compound represented by the following general formula (2): R1-[A]-R2 General formula (1)
Claims15
An ink jet ink comprising at least a coloring material and a water-soluble organic solvent;
- wherein
- the water-soluble organic solvent comprises a branched alkanediol having hydroxyl groups at both terminals of its main chain and at least one of a compound represented by the following general formula (1) and a compound represented by the following general formula (2):
- R1-[A]-R2 General formula (1)
- wherein A is —S—, —S(═O)— or —S(═O)2—;
- and R1 and R2 are each independently a hydrogen atom, a hydroxyl group, an alkyl group, a hydroxyalkyl group, an alkenyl group, an acyl group, a carbamoyl group, a carboxyl group or a sulfonyl group, provided that R1 and R2 are not simultaneously hydrogen atom(s) and/or hydroxyl group(s);
- and
- wherein R3 and R5 are each independently a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, a hydrogen atom, a hydroxyl group, a carboxyl group or a sulfonyl group;
- R4 is a hydrogen atom, hydroxyl group, substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, carboxyl group or sulfonyl group which is bonded to any carbon atom except for the nitrogen atoms and carbonyl group that constitute the five-membered ring;
- and n is an integer of 0 to 4.
6 more elements
Dependencies are inferred from the claim text.