PURPOSE: To provide the titled colorant excellent in dispersibility and color density free from fear of scattering, and easy to handle, by pelletizing a mixture of dyes or pigments, metallic salts of higher fatty acids, and low-melting resinous matter.
CONSTITUTION: 100pts.wt. dye or pigment (e.g., titanium dioxide, carbon black), about 5W150pts.wt. metallic salt of higher fatty acid (e.g., zinc stearate, aluminum stearate), and about 5W150pts.wt. low-melting resinous matter (e.g., low MW polyethylene) are mixed homogeneously in a mixer, melted, cooled, and crushed to form a powder. Then the resulting powder is heated and granulated by an extrusion granulator, etc. to yield the intended pelletized colorant. The obtained colorant is well suited for coloring polyethylene, polypropylene, polyvinyl chloride, and the like.
KOIZUMI SUSUMU
FUNABASHI KENICHIROU
