| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an aq. ink of which the viscosity increase e.g. after an elapse of long time or by heating is reduced and the change in output and the occurrence of blur in writing, etc., are prevented as far as possible by compounding water, a colorant, a crosslinkable poly-N-vinylcarboxamide, and a specific low-molecular compd. into the same. SOLUTION: This ink is obtd. by compounding water, 0.1-40 wt.% colorant comprising a dye or pigment, 1-20 wt.% dispersant selected from among water- soluble resins and anionic and nonionic surfactants, 0.1-15.0 wt.% crosslinkable poly-N-vinylcarboxamide, and 0.01-10.0 wt.% low-molecular compd. which has a mol.wt. of 100-600 and an alkylated heterocyclic group having an alkyl group substd. by at least one kind of functional group selected from among nitro, sulfo, carboxyl, and nitrile groups are compounded in a wt. ratio of the crosslinkable poly-N-vinylcarboxamide to the low-molecular compd. of (10/1)-(1/10).</p> |
