Environmental-friendly coating for blackboards

Abstract

The invention discloses an environmental-friendly coating for blackboards. The coating comprises following components in parts by weight: 45 to 50 parts of organic silicon modified epoxy resin, 9 to 11 parts of stuffing materials, 2 to 6 parts of methyl methacrylate, 5 to 9 parts of methyl triethoxysilane, 10 parts of kaolin, 20 parts of gypsum, 20 parts of cement, 5 to 10 parts of methyl cellulose, and 1 part of sodium dodecanesulphonate. Blackboards made of the environmental-friendly coating have the advantages of convenient preparation, sanitation and hygiene in writing, good writing quality, low price, good anti-friction property, no-deforming, no-cracking, aging resistance, and long service life.

Description

technical field [0001] The invention relates to an environment-friendly teaching blackboard material. Background technique [0002] Must use blackboard when teaching, existing blackboard has gone through several stages such as cement blackboard, wooden blackboard, frosted glass blackboard, metal blackboard generally. Among them, cement blackboards and wooden blackboards belong to the first generation of products. Their disadvantages are that they are dusty and reflective, which is not good for the physical and mental health of teachers and students. In addition, they are easy to slip during the writing process. The cement blackboard is also easy to condense water droplets in rainy days. The two kinds of blackboards need to be maintained every year. The frosted glass blackboard belongs to the second-generation blackboard. Its disadvantages are that it has a lot of dust, is not easy to clean, and is easy to break. The metal blackboard belongs to the third-generation blackboard...

AI Technical Summary

Problems solved by technology

Among them, cement blackboards and wooden blackboards belong to the first generation of products. Their disadvantages are that they are dusty and reflective, which is not good for the physical and mental health of teachers and students. In addition, they are easy to slip during the writing process. The cement blackboard is also easy to condense water droplets in rainy days. The two kinds of blackboards need to be maintained every year. The frosted glass blackboard belongs to the second generation of blackboards. Its disadvantages are that it has a lot of dust, is not easy to clean, and is easy to break. The metal blackboard belongs to the third generation of blackboards. Its disadvantages are that it is easy to rust and expensive.