Aqueous gravure ink
AssigneeKao Corporation
InventorsKazuki Watanabe, Ryuma Mizushima, Takahiro Sato, Yasufumi Ueda
Life of this patent
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Abstract
The present invention relates to an aqueous gravure ink containing a pigment, a polymer, a water-soluble organic solvent, a surfactant and water, in which the water-soluble organic solvent contains a glycol ether having a boiling point of from 100 to 260° C., and a content of the glycol ether in the ink is from 1 to 10% by mass; a total content of the water-soluble organic solvent in the ink is not more than 15% by mass; the surfactant contains an acetylene glycol-based surfactant; and a content of water in the ink is from 50 to 70% by mass.
Claims15
An aqueous gravure ink comprising a pigment, a polymer, a water-soluble organic solvent, a surfactant and water,
- in which the polymer comprises polymer (a);
- the pigment is in the form of pigment particles A dispersed with the polymer (a);
- the water-soluble organic solvent comprises a glycol ether having a boiling point of not lower than 100° C. and not higher than 260° C., and a content of the glycol ether in the ink is not less than 1% by mass and not more than 10% by mass;
- the water-soluble organic solvent further comprises an other water-soluble organic solvent than the glycol ether and the other water-soluble organic solvent is a glycol having a boiling point of not lower than 100° C. and not higher than 260° C.;
- a total content of the water-soluble organic solvent in the ink is not more than 15% by mass;
- a mass ratio of the glycol ether to a whole amount of the water-soluble organic solvent used (glycol ether/whole amount of water-soluble organic solvent) in the ink is from 5/10 to 9/10;
- the surfactant comprises an acetylene glycol-based surfactant;
- Hydrophilic-Lipophilic Balance value of the acetylene glycol-based surfactant is not less than 0 and not more than 4.5;
- and
- a content of water in the ink is not less than 50% by mass and not more than 70% by mass.
Dependencies are inferred from the claim text.