Silica Matting Agent H-305 For Economic Paint

H-305 Silica Matting Agent CAS No.7631-86-9

What will effect the silica matting agent's property？

The water content of precipitated silica includes: free water and bound water. The free water on the surface of silica is easy to remove under

heating. Too little free water means that there are not many light groups on the surface of silica, which reduces the activity of silica. During mixing,

silica aggregates and is difficult to distribute in the rubber. Less surface water not only affects the vulcanization speed, but also reduces the

reinforcement effect accordingly. If the free water is slightly higher, the mixed rubber has good operating performance, fast powder absorption speed,

less dust flying, good roll wrapping, and slightly faster vulcanization speed. However, if the water content is too high, the heat generation is large, it is

easy to burn, agglomerate, and disperse unevenly. The surface of the vulcanized rubber is prone to bubbles, and the physical and mechanical properties

are also reduced accordingly. Generally, surface water of 6-8% can best isolate silica molecules, thereby preventing the particles from agglomerating again.

During mixing, it can be evenly distributed in the rubber, which is conducive to performance improvement and accelerates the vulcanization speed. Bound

water is "inside" silica, relatively stable, and can only be removed at temperatures above 400°C. The general content is 4.0-7.0%. If there is too much bound

water, it means that the gel content generated during the reaction is high, the activity of the finished product after drying is small, and the reinforcement effect

on silicone rubber is also small. Too little bound water indicates excessive dehydration during the reaction and a strong tendency to sandification, which is also

not conducive to reinforcement.

What roles will silica matting agent play in economic paint?

Silicon dioxide is also called as SiO2 powder. It is original material of silica matting agent. Silica matting agent can be used as various roles in economic coatings.

1. Filler: silica matting agent can be used as filler in coating. It can expand the coating covered-area and enhance its durability.

2. Opacity: silica matting agent can improve coating's opacity.

3.Scratches resistance: silica matting agent can enhance coating ability of scratches resistance which can make it being durable.

4. Thermal insulation: silica matting agent has excellent thermal insulation which can keep the coating's surface's temperature from damages of too high or too

low temperature.

5. Adhesion: adding silica matting agent can improve the adhesive ability between paint film and substrate,ensuring better paint retention and longevity.

6.UV resistance: Some formulations incorporate silica with UV stabilizers, protecting the paint from degradation caused by ultraviolet radiation.

7. Abrasion resistance: It can contribute to the abrasion resistance of the paint, making it suitable for high-traffic areas or exterior applications.

8. Cleaning properties: Silica-based particles can be hydrophobic, allowing paints to resist dirt and water accumulation.

When purchasing economic paint chemical dry materials, it's essential to consider the particle size distribution, purity, and the specific requirements of the

intended application. Suppliers may offer different grades of silica dioxide powder, such as colloidal silica, Fumed Silica, or precipitated silica, each with its

own characteristics and benefits.

The following specification parameters will be stated on our Certificate of Analysis.

Anticorrosion Pigments, Inkjet Receptive Coating, Matting Agent