PURPOSE: To obtain a crayon having excellent drawing and heat resistance characteristics etc., with high productivity, by blending together a metal salt of a higher fatty acid, a pigment, etc., granulating the blend, and then molding the granules under pressure at a temp. lower than the m.p. of the higher fatty acid metal salt.
CONSTITUTION: A metal salt of a higher fatty acid (e.g., calcium stearate), a pigment (e.g., red iron oxide), and an extender (e.g., calcium carbonate) are homogeneously blended together in the presence of water and a surfactant (e.g., polyoxyethylene alkyl ether). Then, the homogeneous blend is granulated according to rolling granulation technique etc. The granules are molded under pressure at a temp. which is lower than the m.p. of the higher fatty acid metal salt, thereby obtaining the desired crayon. Suitably, a metal salt of a higher fatty acid is used in an amt. of 10W55wt% based on the wt. of the granule. The granulation, press moldability, etc., of the blend can be improved before granulation by adding a solid polyethylene glycol and blending with other components.
JPS58206672A | 1983-12-01 | |||
JPS57202361A | 1982-12-11 |