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Patent Searching and Data


Title:
NONBAKED COLOR PENCIL LEAD AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPH07126568
Kind Code:
A
Abstract:

PURPOSE: To produce a nonbaked color pencil lead improved in mechanical strengths and suitability for writing by kneading a specified composition and water, extruding the resulting mixture, drying the extrudate and filling the formed pores of the extrudate with an oil or fat and/or a wax.

CONSTITUTION: A mixture of a pigment with an extender is mixed with 3-40wt.% N-long-chain acyl basic amino acid and/or N-long-chain acidic amino acid higher fatty acid ester of a mean particle diameter of 20μm or below and a water-soluble binder. The obtained composition and water are kneaded, and the resulting mixture is extruded, the obtained extrudate is dewatered and dried to obtain a porous product having pores formed owing to the difficult wettability of the extender and the pigment each modified with the N-long-chain acyl basic amino acid. The pores of this product are filled with an oil or fat and/or a wax.


Inventors:
KITAZAWA KATSUNORI
Application Number:
JP27362793A
Publication Date:
May 16, 1995
Filing Date:
November 01, 1993
Export Citation:
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Assignee:
MITSUBISHI PENCIL CO
International Classes:
C09D13/00; (IPC1-7): C09D13/00
Attorney, Agent or Firm:
Hiromitsu Fujimoto (2 outside)