Dry/wet wipable whiteboard pen ink and preparation method thereof

Abstract

The invention relates to dry/wet wipable whiteboard pen ink and a preparation method thereof, and belongs to the technical field of fine chemical engineering. The preparation method is characterized by comprising the following steps: fully infiltrating carbon black by using high-pressure liquefied ozone and carrying out surface oxidation modification on the carbon black by utilizing the strong oxidizing action of ozone; introducing hydrophilic oxygen-containing groups such as carboxyl and hydroxyl to the surface of the carbon black, thereby improving the wettability of the carbon black and improving the dispersion stability of the carbon black in an aqueous solution; opening a high-pressure reactor valve to generate instantaneous gasification expansion and high pressure; enabling the pressure generated by ozone expansion to act on a part between carbon black layers to produce cracks; expanding original cracks and breaking into fine fragments; meanwhile, expanding interlamellar spacingfor enabling additives and water molecules to be easily infiltrated into an interlayer, and further improving the dispersion performance in the water and the wiping effect. The dry/wet wipable whiteboard pen ink disclosed by the preparation method disclosed by the invention has the advantages of stable properties of writing fluid, fluent writing, convenience in dry wiping, better wet wiping effect, no peculiar odor and suitability for writing of commercially-available whiteboards.

Description

Technical field [0001] The invention relates to a dry / wet erasable whiteboard pen ink and a preparation method thereof, belonging to the technical field of fine chemicals. Background technique [0002] The research and development of whiteboard pen ink began in the 1950s. Currently, alcohol and water are used as the main solvents, in line with the theme of the era of environmental protection, dust-free, and erasable. Some ink brands such as South Korea’s Aisilian and German Wendu are world leaders in the manufacturing of high-end inks. The whiteboard pen inks they produce are not only smooth in writing, bright in color, but also uniform in ink, and the handwriting can last for a long time. Up to several months. The research and development of domestic whiteboard pen inks started late, and the current production is still relatively backward, the preparation process is complicated, and the technical content is low. The recent invention patent uses water as the solvent, which is e...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a dry / wet erasable whiteboard pen ink and its preparation method for the ink that uses water as a solvent is not easy to dry, difficult to erase, and affects secondary writing.

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