Yuan Lei Small Classroom | Functional Mechanism and Characteristics of Mica Powder in Coating System

Release time:

2024-01-29 09:38


Yuan Lei Small Classroom | Functional Mechanism and Characteristics of Mica Powder in Coating System


Mica powderThe mineral characteristics


Mica powder is a kind of natural fine muscovite, with fine scale, silk luster, diameter-thickness ratio ≥ 80, specific gravity 2.6-2.7, hardness 2-3. The chemical formula of sericite crystal is: K0.5-1(Al,Fe,Mg)2(SiAl)4O10(OH)2 · nH2O,{001} cleaved completely, and can be split into extremely thin flakes. Rich in elasticity, bendable, heat resistance up to 600 ℃, acid and alkali resistance, strong electrical insulation, good abrasion resistance and wear resistance. In addition, the chemical composition, structure and structure of mica powder are similar to kaolin, so mica has the characteristics of clay minerals: good suspension in water medium and organic solvent, fine white color, sticky and so on.


Functional Mechanism of Mica Powder in Coating System


1. Yuanlei mica powder has a crystal flake structure with a high diameter-to-thickness ratio, which is a flake structure no matter how ultrafine it is. Inorganic minerals in the coating film strength, covering power and the role of the physical shape of the mineral, generally in the following order: flake> fiber> columnar> granular.

2. The special surface of Yuanlei mica powder ore has active groups, which are easy to combine and entangle with molecular chains. They are arranged in parallel in the coating film and overlap up and down, so that a dense layer network structure is formed inside the coating film, thus greatly improving the comprehensive mechanical properties and permeability resistance of the coating film.

3. Yuanlei mica has unique ultraviolet function, which can use more than 80% ultraviolet rays to improve the weather resistance of the paint film.


Contribution of Yuanlei Mica Powder to the Performance of Coatings


1. Two-dimensional flaky crystal structure of mica powder: blocking water vapor penetration, improving water vapor resistance and salt spray resistance of paint film, and improving anti-corrosion performance of paint

2, mica powder dense network structure: parallel arrangement, mutual overlap, improve the film strength, crack resistance, improve the mechanical properties of the coating

3. Excellent chemical inertness of mica powder: acid resistance, alkali resistance, high temperature resistance, electrical insulation, improve the anti-corrosion stability and electrical insulation of the coating

4, sericite powder clay mineral characteristics: good suspension in organic solvents, anti-sinking, easy to disperse, improvePaintThe storage stability

5. UV function of mica powder: absorb ultraviolet rays, protect the polymer chain in the coating film, and improve the weather resistance of the coating


yuanlei wet methodMica ProductsThe characteristics


Wet ramming and stripping: the sheet-like structure is intact, and the diameter-thickness ratio is large.

Wet cyclone sand removal: flotation enrichment, high purity of sericite

Wet stripping ultra-fine: fine particle size and narrow particle size range control

Wet iron removal bleaching: less impurities in the product, whiteness increased by more than 10% compared with dry products

Controllable and stable quality: The wet process is less affected by external factors such as ore quality and climate change, and the quality is controllable and stable.



















Mica powder, coating, wet, flake, improve, mica, mineral, with, structure

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Fillers in coatings are usually white or slightly colored pigments with a refractive index less than 1.7. It has the basic physical and chemical properties of pigments used in coatings, but due to its refractive index being similar to the film-forming material, it is transparent in coatings and does not have the coloring and covering power of coloring pigments. It is an indispensable pigment in coatings.

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In architectural coatings, commonly used mineral materials include barium sulfate, calcium carbonate, kaolin, mica powder, talc powder, quartz powder, silica micro powder, transparent powder, glass powder, wollastonite powder, etc. Reasonable application of various mineral materials can effectively improve or enhance the performance of coatings. Let's take a look at the application of different mineral materials in coatings.

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