| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an aqueous ink wherein the generation of troubles such as the change of the whole viscosity and the reduction of the extruded ink amount are controlled to the utmost, even when the ink for writing tools or ink jets is left for a long period or heated, by adding a crosslinked poly N- vinylcarboxylic acid amide, and the like. SOLUTION: This aqueous ink comprises (A) at least water, (B) a coloring agent, (C) a crosslinked poly N-vinylcarboxylic acid amide, and (D) an amine having an amino group and a >=3C hydrocarbon skeleton. The component B, the component C, and aminomethylpropanediol, or the like, as the component D are used in amounts of 0.1-40 wt.%, 0.05-15.0 wt.% and 0.01-10.0 wt.%, respectively. (E) A water-soluble polymer such as polyvinyl alcohol may further be used, and a dispersant such as rubber arabic may furthermore be used, when the component B is a pigment.</p> |
