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Title:
PRODUCTION OF CRAYON
Document Type and Number:
Japanese Patent JPS6357683
Kind Code:
A
Abstract:

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.


Inventors:
KANO YOSHIMI
Application Number:
JP20182386A
Publication Date:
March 12, 1988
Filing Date:
August 29, 1986
Export Citation:
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Assignee:
BUNCHO CORP
International Classes:
C09D13/00; (IPC1-7): C09D13/00
Domestic Patent References:
JPS58206672A1983-12-01
JPS57202361A1982-12-11
Attorney, Agent or Firm:
Suzuki Ikuo



 
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