| 摘要 |
<p>PURPOSE:To provide the titled ink which is odorless and non-toxic and gives handwriting which is persistent and can be continuously peeled off, consisting of a specified emulsion, a dye and/or a pigment, a polyoxyethylene/polyoxypropylene block polymer and water. CONSTITUTION:An emulsion which has a solid content of 5-40wt% (based on the total quantity of ink), a viscosity of 60cP or below at 25 deg.C and a surface tension of 20-88dyn/cm, contains a plasticizer and a film-forming aid (e.g. butyl carbitol) and can be used as an aq. strippable film-forming material, 3-30wt% dye and/or pigment, 0.5-10wt% polyoxyethylene/polyoxypropylene block polymer and optionally additives such as surfactant, wetting agent, dispersant, etc. are dispersed in water to obtain a water ink for writing utensils.</p> |
