| 摘要 |
Disclosed are a process for the production of a pigment/resin composition, a coloring agent, and a coloring method. The process is characterized by introducing both a pigment and a heat-meltable resin continuously into a kneading extruder provided with at least one vent hole in the presence of moisture in an amount of 3 to 70mass% of the sum of the pigment and the resin, kneading the pigment and the resin together at a temperature not lower than the melting point of the resin while discharging steam produced from both separated moisture and remaining moisture through the vent hole, and thus dispersing the pigment in the molten resin. According to the process for the production of a pigment/resin composition, the coloring agent and the coloring method, a coloring agent useful in coloring plastics or in coloring image recording agents can be produced with flexible accommodation to an increase in demand, while enhanced production efficiency, shortened processing time, man-power saving, and streamlining can be attained in charging and in steps subsequent to kneading. |
