Dry erase ink for non-porous surfaces

Abstract

A dry-erase ink is disclosed for writing or marking on glossy and non-porous surfaces, in particular whiteboards or dry-erase boards, which ink is wipeable or erasable after drying without leaving visible colored residues. The ink contains a solvent, one or more dye(s) soluble in the solvent, a film forming resin such as polyvinylpyrrolidone or a derivative thereof, a strongly-alkaline substance such as a diamine and / or a quaternary organic ammonium hydroxide, an organic acid or a salt thereof and, if desired, a nonvolatile, liquid component serving as a release agent.

Description

[0001] cross reference [0002] This application takes the German patent with the application number 102006 032 697.0 and the filing date as July 14, 2006 as the priority basis, and all the contents described in it are incorporated into this application by reference. technical field [0003] The present invention relates to an ink that can be applied to non-porous and / or smooth surfaces, for example, can be written on a whiteboard, and can be erased or wiped off after drying without leaving visible and / or have residual traces of color. Background technique [0004] When writing or marking on a smooth surface such as a writing board or dry erase board, the ink can be wiped or wiped after drying without leaving any visible residual color, so writing can continue on the wiped surface. These surfaces are characterized by their hard, white surface, very smooth appearance, and are essentially non-porous. [0005] Conventionally, the ink suitable for this type of surface contai...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this type of pigmented liquid ink is that before the ink is written, that is, before the ink moves to the tip of the writing pen and is actually written on the panel, the pigment is often precipitated in the ink reservoir of the writing pen

Therefore, the pigment content in this type of liquid ink will be reduced, resulting in relatively light and weak images written with this ink

[0006] Inks containing soluble dyes are generally not suitable for use on dry-erase boards, because usually the dye dries to the dry-erase board surface too strongly, so it is either difficult to rub off, or does not come off at all, or requires additional solvents to clean the surface of the tablet