Erasable ink composition for writing on an impervious surface
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United States of America Patent
Stats
-
Mar 17, 1981
Grant Date -
N/A
app pub date -
Oct 25, 1979
filing date -
Oct 20, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An erasable ink composition for writing or marking on an impervious surface which comprises: about 40-90% by weight of an organic solvent; about 1-10% by weight of a pigment; about 1-25% by weight of a separating agent which is soluble in the solvent, and is a non-volatile or only slightly volatile liquid at normal temperatures having a lower vapor pressure than the solvent; about 0.5-20% by weight of a synthetic resin which is soluble both in the solvent and a solution of the separating agent in the solvent, and is insoluble or only slightly soluble in the separating agent; and about 0.05-20% by weight of a hydrocarbon wax.
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