Hydrochloric Acid Process Silica For Coating

Jinsha Precipitated Silica Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of hydrochloric acid process silica for coating in China. With abundant experience, we warmly welcome you to buy high quality products made in China here from our factory. Contact us for more details.

Product:Precipitated silica(SiO2) for Coating as Matting /Anti-setting Effect/Anti-Caking and Anti-Adhesion Agent

Item No.:JS-H01

CAS. NO.:7631-86-9

Delivery time:15 days after receipt of your payment

HS CODE:281122

Hydrochloric acid process silica, as the name suggests, refers to an amorphous silica product obtained by using sodium silicate (commonly known as water glass) solution as raw material, reacting with hydrochloric acid for acidification, and then undergoing a series of processes including neutralization, precipitation, filtration, washing, drying, and precise pulverization. Because its core step involves chemically "precipitating" the silica from the solution, it is also called precipitated silica.

This process route gives the product unique physicochemical characteristics: its primary particle size is usually in the micron or sub-micron range, with high porosity and controllable specific surface area. Compared with fumed silica, which is prepared using a high-temperature hydrolysis process and is expensive, precipitated silica maintains many excellent properties while possessing a significant cost advantage, enabling its large-scale application in industrial coatings, wood coatings, architectural coatings, and other fields. It is a truly cost-effective coating-grade silica.

JS-H01

When hydrochloric acid process silica is precisely designed to specifically serve coating systems, it exhibits remarkable multifunctionality.

1. Efficient Matting Performance
This is the most well-known function of coating-grade silica. Its working principle is: when the paint film dries and cures, these tiny, hard silica particles are evenly distributed on the surface of the paint film, forming microscopic unevenness. When light shines on the paint film, diffuse reflection occurs, significantly reducing surface gloss and producing a matte effect. By selecting products with different particle sizes and size distributions, coatings engineers can precisely design various gloss effects, from silky smooth to deep matte, widely used in high-end furniture paints, decorative paints, and industrial topcoats.

2. Excellent Thickening and Anti-Settling Effects
The surface of precipitated silica particles is rich in silanol groups, which can interact with each other through hydrogen bonds, forming a weak but effective three-dimensional network structure in the coating system. This structure gives the coating good thixotropy-that is, high viscosity when at rest, preventing pigment and heavy filler sedimentation and agglomeration; and rapid viscosity reduction when subjected to shear force (such as stirring, brushing, spraying), facilitating application. This not only ensures the stability of the product throughout its storage period but also effectively avoids sagging during application, which is especially crucial in industrial anti-corrosion coatings requiring specific film thickness.

3. Significant Abrasion and Scratch Resistance
Silica itself has a high Mohs hardness. When these hard particles are evenly dispersed and firmly embedded in the paint film, they can greatly improve the macroscopic hardness, mechanical strength, and abrasion resistance of the paint film. This is an indispensable key performance for coating systems that are frequently subjected to wear, such as floor paints, interior paints for transportation vehicles (trains, airplanes), and various industrial protective coatings.

4. Excellent Anti-Caking and Anti-Adhesion Properties
For coil coatings, packaging coatings, or painted products that require stacking and storage, paint film surface adhesion is a troublesome problem. The micro-protrusions formed by coating-grade silica on the paint film surface can greatly reduce the actual contact area between coatings, thereby effectively reducing their adhesion tendency and ensuring product quality and transportation safety.

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