Precipitated Silica Matting Agent For Coil Coatings

SKYSIL S10 Hydrophobic Silica

Depending on the application, semi-gloss or matte powder coatings are sometimes required. In order to reduce the gloss of the coating film,

commonly used matting agents include ultrafine silica, talcum powder, aluminum stearate, calcium stearate, low molecular weight thermoplastic

resin, etc. To obtain the matting effect, the following methods can be used:

a. Mix powder coatings with different curing speeds by dry mixing, then the gloss of the resulting coating film will be significantly reduced, which

will play a matting role.Because the powder coating with high reaction activity cures quickly, the leveling and reaction of the slower curing resin in

the continuous phase are hindered, and the cured coating film eventually loses its gloss. Although this method is effective, it increases the manufacturing

process and cost.

b. Add thermoplastic resin

Adding cellulose acetate to epoxy powder coatings and adding fine powdered low molecular weight polyethylene and polypropylene resins to polyester

powder coatings can obtain matting powder coatings. The gloss of the coating film is affected by manufacturing conditions. Because the addition of

thermoplastic resin will affect the storage stability of the powder coating, the addition amount is limited to 2-3% of the resin amount.

c. Use a special Curing Agent with matting effect.

d. Add fillers with matting effect.

Adding fillers such as ultrafine silica and talcum powder can significantly reduce the gloss. In particular, the particle size of the filler has a great influence

on the gloss of the coating. The larger the particle size, the lower the gloss. It should be noted that increasing the amount of filler will reduce the flatness

and mechanical strength of the coating. In epoxy powder coatings, the effect of calcium carbonate particle size on the gloss of the coating is shown in the

table. Adding ultrafine silica and kaolin to acrylic and polyester powder coatings can obtain matting coatings. In addition, adding waxy substances such as

polyethylene paraffin and hydrogenated castor oil can also obtain matting coatings.

In recent years, my country's coating industry has been in the ascendant, and the total output of coatings has also jumped to the forefront of the world, forming

a related industrial group, actively promoting the technological revolution and development in the field of traditional coatings. During this period, high-gloss bright

coatings were deeply loved by consumers for their bright colors and brightness, and dominated the coating market for a long time.

However, with the continuous improvement of people's living standards, on the one hand, consumers feel that high-gloss glossy paints reflect light seriously after

film formation, which is harmful to people's eyes; on the other hand, consumers' aesthetic concepts are increasingly inclined to leisure, fashion and personalization.

Coupled with the booming demand in my country's automobile and home appliance industries. These factors have led to a sharp increase in people's demand

for low-gloss paints with a soft appearance. At the same time, how to produce paints with matte properties has become a problem that paint designers must

consider.

Chemical Parameters

 Anticorrosion Pigments, Inkjet Receptive Coating, Matting Agent