Non-baked color pencil leads and method for preparing same

Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion

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106 26A, 106 25A, 106 19B, 26421111, 26421112, 264349, B43K 1902, C09D 1300

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active

055957005

ABSTRACT:
Non-baked color pencil leads are obtained by forming a blend composition from a filler, a coloring agent, a binder without any wax, and a water/oil repellant substance, kneading the mixture with a solvent and/or plasticizer, extruding the kneaded material, drying the extruded articles to remove the solvent and/or plasticizer therefrom to form open pores therein owing to the less wettability of the water/oil repellant substance, and then impregnating the pores with an oil, a fat and/or a wax. Since the oil, the fat and/or the wax is not blended into the composition, bleeding does not occur at the time of the drying, which permits drying the articles at a high temperature for a short period of time, whereby the manufacturing cost can be decreased. The thus obtained non-baked color pencil leads are remarkably excellent in physical properties such as bending strength and pointed end strength and have a smooth writing performance.

REFERENCES:
patent: 1937105 (1933-11-01), Thomsen
patent: 2075223 (1937-03-01), Pischel
patent: 2273935 (1942-02-01), Chesler
patent: 2355638 (1944-08-01), Ferst et al.
patent: 2645582 (1953-07-01), Loy
patent: 2917777 (1959-12-01), Pischel
patent: 4017451 (1977-04-01), Ishida et al.
patent: 4853167 (1989-08-01), Bard et al.
patent: 4931163 (1990-06-01), Watanabe et al.
patent: 4950814 (1990-08-01), Maeda et al.
100:105304p, Chem Abstracts (1984).
96:21454y, Chem Abstracts (1982).
JP-A-62 000 569, Patent Abstracts of Japan, vol. 11, No. 167, May 28, 1987.
AN 87-041007, Database WPIL, Week 8706, Apr. 8, 1987.
JP-A-56 100 874, Database WPIL, Week 8139.
62-274190 (A) Abstract.
Solvent Soluble Fluoro-Carbon-Resin, J. Chem. Soc. vol. 44, No. 9 (1991).
T. Mseda et al., New Fluorocarbon Materials by Direct Fluorination of Pitch, 13th International Fluorine Chemistry Symposium in Germany.
Toshiyuki Maeda, Development of the New Fluoro -Carbon Material.
Hiroyuki Fujimoto et al., J. of Fluorine Chemistry 57:65-71 (1992).
Hiroyuki Fujimoto et al., Carbon 30(6):851-857 (1992).
M. Yoshikawa et al. J. of Flourine Chemistry, vol. 58 (1992).

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