Wall surface aqueous environmentally-friendly coating material capable of being repeatedly written with water, and preparation method thereof

Abstract

The invention provides a wall surface aqueous environmentally-friendly coating material capable of being repeatedly written with water, and a preparation method thereof, wherein the coating material comprises, by mass, 20-70% of an aqueous coating material emulsion, 2-30% of a water-induced color developing material, 1-8% of a cosolvent, 5-35% of a filler, 0.5-5% of a film forming aid, 0.5-3% of adispersing agent, 0.01-1% of a defoamer, 0.01-1.5% of a leveling agent, 0.02-3% of a thickener, 0.03-3% of a preservative and the balance of water. According to the invention, the water-induced colordeveloping material is used as the aqueous coating material of the color developing agent, and has the properties of no color after being dried, color developing when meeting water, fading after being air-dried and dewatered, and color developing again by using water after being brushed on a wall surface, so that the repeated writing on the wall surface coated with the coating material of the invention can be achieved by using the water as the writing liquid; and the coating material can be used for manufacturing teaching, training and child scrawling boards, so that the teaching environmentis environmentally-friendly, sanitary and healthy.

Description

technical field [0001] The invention relates to a coating, in particular to a water-based environmental protection coating for walls that can be repeatedly written with water and a preparation method thereof. Background technique [0002] Teaching with blackboard chalk is the most original and traditional teaching method. Writing on the blackboard with chalk will generate a large amount of dust, which will pollute the teaching environment and endanger the health of teachers and students. Moreover, the dust adsorbed on classroom electronic teaching equipment can easily cause equipment failure and lead to waste of resources. Whiteboard pen is an important member of teaching and office supplies, but because the solvent of its writing fluid is a volatile organic solvent, it is volatile, the pen tip is easy to dry, and pollutes the environment; the whiteboard used with it must be clean and resistant to organic solvents ( Reflective) enamel whiteboard, its strong reflective effe...

AI Technical Summary

Problems solved by technology

Writing on the blackboard with chalk will produce a lot of dust, which will pollute the teaching environment and endanger the health of teachers and students

And the dust adsorbed on classroom electronic teaching equipment can easily cause equipment failure and lead to waste of resources

Whiteboard pen is an important member of teaching and office supplies, but because the solvent of its writing fluid is a volatile organic solvent, it is volatile, the pen tip is easy to dry, and pollutes the environment; the whiteboard used with it must be clean and resistant to organic solvents ( Reflective) enamel whiteboard, its strong reflective effect will cause visual fatigue, which is not conducive to teaching; the carbon black in the whiteboard pen is easy to contaminate clothes and clothes, and is not easy to clean; the writing fluid has strong penetrating power, pollutes the board surface, and is easy to retain for a long time Leave shadows on the board surface, and the shadows must be erased with organic solvents such as acetone; after cleaning the board surface, it is easier to leave shadows when writing again, and it is more difficult to remove, thus shortening the service life of the whiteboard and causing waste of resources

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