Mica powder
Product Name:Sericite powder
Product introduction :Mica powder is an important raw material used in the production of coatings, paints, plastics and other products,

Detailed introduction

Mica powder is an important raw material used in the production of coatings, paints, plastics and other products, and with its unique functionality, the application range is increasingly wide. So, do you have an accurate grasp of the product characteristics and use methods of sericite?


Mica is a kind of unique performance of layered aluminum silicate minerals, can effectively block, shielding ultraviolet radiation, high temperature resistance, acid and alkali resistance, corrosion resistance, weather resistance, insulation, low inflation rate, etc, are widely used in coatings, plastics, printing ink, printing, cosmetics, automotive industry, toys, leather, rubber, packaging, decoration and other fields.


However, mica has high surface polarity, poor compatibility, easy agglomeration and uneven dispersion, so it is necessary to modify the surface of mica in order to give better play to the characteristics of mica while maintaining other properties of the material. The commonly used surface modification methods of mica are mainly as follows:


1, coupling agent modified mica


Coupling agent is the most commonly used surface modifier of mica. There is a small amount of exposed active -OH on the surface of mica. In the process of modifying sericite, the coupling agent firstly hydrolyzed and condensed into oligomer, and then reacted with -OH to make -OH become a firm Si-O bond, so that the coupling agent is coated on the surface of mica.


2. Surface active agent modification of mica


Surfactants are amphoteric substances with strong adsorption capacity, which are easy to adhere to the surface of mica and thus change its hydrophilicity. The modification effect is mainly affected by the adsorption capacity of the surface of mica, the selection of surfactants and the processing temperature in the later stage.

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