What is the Application of Mica Powder in Architectural Coatings?

Nov. 12, 2020

As a Wet Ground Mica Manufacturer, share with you. With the improvement of the quality of life, people's requirements for architectural coatings have been upgraded from simple decoration to functionality, environmental protection, and experience. Architectural coatings are required not only to have a good scrub resistance and brushability, but also to put forward higher and newer requirements for visual effects.

Due to its unique crystal structure and mineral composition, such as fine texture, large diameter-to-thickness ratio, strong stretch resistance, superior radiation resistance and UV resistance, and environmental protection, mica powder has received increasing attention from the coatings industry.

Sericite Mica

Sericite Mica

The superiority of mica powder in the formulation of paints has an irreplaceable position with other inorganic fillers. This is because the mica flakes tend to be aligned parallel to the surface of the paint film, forming a solid and flexible anti-corrosion and ultraviolet radiation protection layer; at the same time, because the mica powder flakes seal the pores of the paint film, it can make the coating The stress uniformity is improved, thereby enhancing the crack resistance, weather resistance, acid and alkali resistance, smooth surface and aesthetics of the paint film.

Whether it is exterior wall coatings that tend to be pollution-free and high in antifouling properties, or interior wall coatings that are developing toward a healthy type, mica powder can meet the filler requirements of paint manufacturers due to its own advantages, and is favored by many manufacturers. It has been widely used in the coating industry.

Mica is one of the most widely distributed minerals in the earth's crust. It belongs to the flaky structure of hydroaluminosilicate minerals. It is a very important non-metallic mineral material and has applications in many fields. For downstream users of mica powder, what is most concerned about is the particle size of the mica powder and whether it still retains the original flaky crystal form, which is often referred to as the "diameter-thickness ratio".

Before understanding the importance of the diameter-to-thickness ratio to mica powder, let’s take a look at its structure: Through analysis, it can be found that the crystal of mica is a compound silicon-oxygen layer composed of two silicon-oxygen tetrahedrons and an aluminum-oxygen octahedron. That is 2:1 type. Depending on the type and content of the metal ions filled in the alumino octahedral voids, the chemical composition of mica will change, and its color will deepen with the increase of iron content, which can form minerals such as muscovite, phlogopite, and biotite. Among them, muscovite is the most widely used category. Because mica is a layered structure, it has good cleavability and can be peeled into very thin slices along the cleavage surface. 

Our company also has Sericite Mica on sale, please contact us.