Natural SiO2 Powder Chemical Material For Coil Paints

What are the treatment methods and effects of matting powder?

If the particles are too large, the surface of the paint film will be too rough, affecting the feel and appearance. Choose products

with higher porosity (pore volume). The larger the porosity, the higher the powder content per unit weight, and the better the matting

performance. The smaller the average particle size of the Matting Agent, the better the transparency, but the corresponding matting

power will also decrease. It should be pointed out that too high a fine powder content will have a negative impact on transparency.

Matting powder treated with mixed organic raw materials:

The anti-settling function will be better. As the storage time of the paint increases, the matting powder will show stratification and

sedimentation to a certain extent, but this is only a short time. If the time is too long, it will still settle.

Generally used in varnish, wax-treated matting powder is added to the varnish to prevent sedimentation and hardening, and it is well

compatible with solvent-based paint systems, and will not cause heavy floating adhesion problems. On the contrary, it also increases the

scratch resistance of the paint film. The disadvantage is that the matting powder treated with wax has a slightly poor matting property and

the paint film has a slightly poor light transmittance. The untreated one is cheap and has a good matting degree.

If untreated silica is to be applied to coatings, its structuring degree and uniformity of particle size distribution need to meet extremely high

requirements. Thanks to our experienced R&D team, our BACOSIL series of matting silica can effectively meet such needs, and has excellent

performance in anti-settling and matting performance.

The choice of matting powder still needs to be determined by the specific performance in its own system. There is no good one, only suitable

one.

The influence of particle size on the application performance of silica matting powder

Due to its excellent properties, silica matting powder has become a widely used matting additive in matte coatings. Silica is a solid particle.

No matter what manufacturing process it goes through, it cannot be composed of a single particle size, but fluctuates within a certain particle

size range and forms a certain pattern. Different particle sizes have different probabilities of appearance. The powder has good particle uniformity

and good application performance. This paper studies in detail the influence of the average particle size and distribution of Silica Powder on the

application performance of silica, which has certain practical guiding significance for the selection of matting powder in coating production.

Performance study

1. Matting property

Weigh a certain amount of main paint, add the prepared Curing Agent, adjust the viscosity to 15-20s with the formula thinner, and then spray it

on the wood board. After the paint film is naturally dry, use a 60° gloss meter to test.

2. Transparency

Weigh a certain amount of wood varnish, add a small amount of matting powder, disperse it evenly with a high-speed disperser, pour it into a

125mL white wide-mouth bottle, and observe the transparency with the naked eye.

3. Anti-sedimentation property

Sedimentation rate: Add 5% matting powder to butyl acetate, disperse it evenly with a disperser, pour it into a 125mL white wide-mouth bottle

and observe its sedimentation rate. Storage stability: Place the prepared main paint in an oven at 50℃ for 15d, observe the sedimentation volume,

and test the hardness of the sediment with an ink knife.

SL-710 Silica Matting Agent is synthetic amorphous silica appearing as white powder.

CAS Number(SILICON DIOXIDE):7631-86-9

Anticorrosion Pigments, Inkjet Receptive Coating, Matting Agent