Non-baked color pencil leads and method for preparing same

Details Non-baked color pencil leads and method for preparing same Non-baked color pencil leads and method for preparing same

1993-05-06

1994-06-07

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

106 19A, 106 19C, 106 19E, C09D 1300

Patent

active

053186222

ABSTRACT:
Novel non-baked color pencil leads are here disclosed which can be obtained by forming a blend composition from a filler, a pigment, a binder and the like without using any wax, at least one of the pigment and the filler being all or partially covered with a fluorinated aromatic compound, kneading the blend composition with a solvent and/or a plasticizer, extruding the kneaded material, drying the extruded articles to remove the solvent and/or the plasticizer therefrom, and then impregnating the porous articles with an oil, a fat and/or a wax.
The thus obtained non-baked color pencil leads are remarkably excellent in mechanical properties such as bending strength and pointed end strength, has a smooth writing performance, and permits the drawing of uniform lines. A high-temperature and short-time drying treatment is possible, which can remarkably decrease a manufacturing cost. The color pencil leads which can be erased with an eraser or the color pencil leads which cannot be erased with an eraser can be selectively prepared.

REFERENCES:
patent: 1502763 (1924-07-01), Bugbee
patent: 2273935 (1942-02-01), Chester
patent: 2355639 (1944-08-01), Ferst et al.
patent: 4931163 (1990-06-01), Watanabe et al.

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