| 摘要 |
PROBLEM TO BE SOLVED: To obtain a colorant composition which is able to color an aliphatic polyester-based biodegradable resin simultaneously with molding thereof and wherein a colorant (pigment) is uniformly dispersed in the biodegradable resin and the surface of the molded article is uniform and smooth, so that the molded article has a good appearance. SOLUTION: This colorant composition comprises 30 to 99.98 wt.% of an aliphatic polyester-based biodegradable resin, 0.01 to 60 wt.% of a pigment, and 0.01 to 40 wt.% of a wax dispersant. This colorant composition is provided as colored pellets after kneading of a mixture of the synthetic aliphatic polyester-based biodegradable resin, pigment and wax dispersant. |
