Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Chikamasa Nakamura

Masayuki Takahashi

Michiei Nakamura

Hiroyuki Shimanaka

Kazuo Kanou

Keiji Nakajima

Yukio Kanbara

Masayuki Kinnou

A process is provided for producing a colored fine particulate composition by dissolving or dispersing a coloring matter or a coloring matter and charge control agent in a condensation-polymerized resin component and forming the resultant resin composition into fine particles. The coloring matter or the coloring matter and charge control agent are added to a raw material component for the production of the resin component, or to the resin component in a period from initiation to completion of polymerization of the resin component or while the resin component is in a molten state subsequent to the completion of the polymerization, whereby the coloring matter or the coloring matter and charge control agent are dissolved or dispersed in the resulting resin component. A colored composition obtained subsequent to the dissolution or the dispersion is cooled. The colored composition so cooled is then formed into fine particles.

Production process of colored fine particulate composition and colored fine particulate composition produced by the process

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Tokyo, Japan

Chikamasa Nakamura