| 摘要 |
<p>PURPOSE:To obtain a water-base marking pen ink for a writing board which is easily erasable by rubbing with a dry eraser not only just after writing on a writing board but also long after the writing. CONSTITUTION:This ink comprises a colorant, a release agent, a polymer latex, and water provided the release agent is selected from the group consisting of an alkyl ester of a fatty acid, a dialkyl dicarboxylate, a polyglycerin ester of a fatty acid, a glycol ether ester of a fatty acid, a di(glycol ether ester) of a dicarboxylic acid, and an alkyl vinyl ether.</p> |
