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US5316574A Erasable ink composition for writing on impervious surface 失效
可擦拭油墨组合物,用于在不透水表面上书写

Erasable ink composition for writing on impervious surface
摘要:
An erasable ink composition for writing on an impervious writing surface comprising an organic solvent, a resin, a pigment, and a separating agent which comprises a polyoxyethylene polyoxypropylene monoalkyl ether which is liquid at normal temperatures in an amount of 5-20% by weight, and optionally at least one organic compound selected from the group consisting of a carboxylic acid ester and a polyoxypropylene monoalkyl ether which is liquid at normal temperatures in an amount of 2-10% by weight in conjunction.
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