| 摘要 |
<p>PURPOSE:To improve remarkably water resistance and at the same time long- standing stability and resistance to drying up by compounding an anionic dye in a water-based vehicle contg. a specified polyamine, a stabilizer and water. CONSTITUTION:A water-based vehicle contg. a polyamine with a mol.wt. of 300 or above wherein 3-20% of the amino groups incorporated per molecule are prim. amino groups, at least one stabilizer selected from among urea, thiourea, ethyleneurea, hydroxyethylurea, hydroxypropylurea, ethylenethiourea, diethylthiourea, 2-pyrrolidone, polyvinylpyrrolidone, sorbitol and dimethyl sulfone, and water is compounded with an anionic dye with a solubility of 10wt.% or more in this vehicle. If a wetting agent such as ethylene glycol, polyglycerine or ethyl cellosolve is incorporated therein, a more remarkable effect of preventing precipitation in an ink can be expected.</p> |
