| 摘要 |
PURPOSE:To provide a water-based pigment ink having excellent dispersion stability and drying resistance, and suitable for the use in the state of low viscosity, e.g. for writing utensils, by adding a resin acid and a specific aminopropanol derivative to a water-based pigment ink. CONSTITUTION:The objective ink can be produced by mixing, grinding and dispersing (A) a pigment, (B) an aminopropanol derivative of formula (R is H, CH3, OH or CH2OH; n is 1-20), (e.g. 2-amino-2-methyl-1-propanol), (C) a resin acid such as shellac, (D) a water-soluble organic solvent such as glycol solvent, etc., and (E) water, etc. using a pigment dispersion machine. The preferable weight ratios of A:B:C:D:E are (5-20%):(0.1-20%):(1-30%):(10-30%):(70-40%). If necessary, the ink may be incorporated with 0.1-1% surfactant. USE:Writing utensils, fountain pen, recorder pen, printing, etc. using fiber tips, etc. |
