The application of mica powder in coatings is mainly reflected in the following aspects: Synthetic mica powder

1. Flame retardant: Synthetic mica powder is a valuable flame retardant filler. If combined with organic halogen flame retardants, flame retardant and fire retardant coatings can be obtained.

2. Improve the physical and mechanical properties of the paint film: The use of sericite powder can improve a series of physical and mechanical properties of the paint film. The key is the morphological characteristics of the filler, that is, the diameter-thickness ratio of the flaky filler and the aspect ratio of the fibrous filler. The granular filler is like the sand in the concrete, which plays a reinforcing role in the reinforcement.

3. Improve the anti-wear performance of the paint film: the hardness of the resin itself is limited, and the strength of many fillers is not high (such as talc). On the contrary, sericite is one of the components of granite, which is very hard and mechanically strong. Therefore, adding sericite powder as a filler in the coating can significantly improve its anti-wear performance. Car coatings, road coatings, mechanical anti-corrosion coatings, and wall coatings mostly use sericite powder.

4. Sound insulation and shock absorption: sericite can significantly change a series of physical moduli of the material, forming or changing the viscoelasticity of the material. These materials efficiently absorb vibrational energy and attenuate shock and sound waves. In addition, shock waves and sound waves are repeatedly reflected between the mica wafers, which also reduces their energy. Sericite powder is also used to formulate sound-deadening, sound-insulating, and shock-absorbing coatings.

5. Insulation performance: sericite has extremely high resistance, and is itself the most excellent insulating material. It forms a compound with silicone resin or silicone boron resin, and when it encounters high temperature, it is converted into a ceramic substance with good mechanical strength and insulating properties. , still maintain the original insulation state. Very important for mines, tunnels, special buildings, special facilities, etc.

6. Anti-ultraviolet and infrared performance: sericite has excellent performance of shielding ultraviolet and infrared rays. Therefore, adding wet sericite powder to outdoor coatings can greatly improve the UV resistance of the paint film and delay the aging of the paint film. Its infrared shielding properties are used to formulate thermal insulation and thermal insulation materials (such as coatings).

7. Thermal radiation and high temperature coatings: sericite has good infrared radiation ability, such as cooperating with iron oxide, it can cause excellent thermal radiation effect.

8. Barrier effect: The flake fillers form a basically parallel orientation in the paint film, and the penetration of water and other corrosive substances into the paint film is strongly blocked. 50 times, preferably more than 70 times), the penetration time of water and other corrosive substances through the paint film is generally extended by 3 times. Since the sericite powder filler is much cheaper than the special resin, it has very high technical value and economic value. The use of high-quality sericite powder is an important means to improve the quality and performance of anti-corrosion coatings and exterior wall coatings. During the coating process, the sericite wafers lie down under the action of surface tension before the paint film is cured, and automatically form a structure that is parallel to each other and to the surface of the paint film. In such a layer-by-layer arrangement, its orientation is just perpendicular to the direction in which the corrosive substances penetrate the paint film, and the barrier effect is most fully exerted.