Abrasives(white corundum) works in coating
With the development of human civilization, people’s demands in all aspects are increasing.
Take paint production as an example. Previously, commonly used fillers included quartz powder and talc powder. However, with the emergence of higher standards and requirements from users, manufacturers have chosen and adopted more advanced fillers.
Firstly, white corundum, also known as white fused alumina or white aluminum oxide ,is produced by melting and recrystallizing high-purity alumina in a 2000℃ electric arc furnace. It has a high Mohs hardness of 9.0.
Recently, it has been widely used in the production of epoxy floor coatings. Its advantages include high hardness, which increases the wear resistance of the floor; white corundum is resistant to acids and alkalis, enhancing the weather resistance of the floor and extending its service life.
Secondly, silicon carbide, including black silicon carbide and green silicon carbide, has a higher hardness, reaching a Mohs hardness of 9.4, and is purer. Green silicon carbide micron powder is often used in the production of Teflon coatings, non-stick cookware coatings, UV coatings, and powder coatings.
In addition, hollow glass microspheres are widely used in weather-resistant anti-corrosion coatings, automotive coatings, marine antifouling coatings, and pipeline anti-corrosion coatings. In coatings, they play the following roles: reducing VOCs, increasing fluidity, reducing oxygen/water permeability, reducing shrinkage and cracking, and providing barrier and inhibitory effects.