Process for producing blackboard crayon

Details Process for producing blackboard crayon Process for producing blackboard crayon

1985-09-10

1986-10-14

Liberman, Paul

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

106 23, 106 27, 106 28, 106 31, 106308F, C09D 1360

Patent

active

046170588

ABSTRACT:
A process for producing blackboard crayon by molding a mixture of calcium carbonate, titanium oxide and zinc oxide in place of conventional calcined gypsum or chalk, a resinous material primarily containing paraffin, beef tallow or palm oil as a coagulant, and a solvent, into a stick form. The blackboard crayon does not scatter dust.

REFERENCES:
patent: 3491043 (1970-01-01), Zmitrovis
patent: 4193906 (1980-03-01), Hatanaka
patent: 4212676 (1980-07-01), Ueda
patent: 4256494 (1981-03-01), Yamamoto et al.
patent: 4382819 (1983-05-01), Berghofer
patent: 4525214 (1985-06-01), Panken
patent: 4545819 (1985-10-01), Shioi et al.

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