SL-620 Excellent Ink Agent 7631-86-9

Silica Matting Agent is an important rheological additive for coatings

Rheology refers to the deformation and flow properties of a substance under the action of external forces, mainly referring to the relationship

between stress, deformation, deformation rate and viscosity during processing. It is an important property of coatings, which directly affects

the appearance, construction performance and storage stability of coatings. Silica is an important rheological additive for coatings.

Different coating systems have different requirements for rheological additives. For oily systems, most rheological additives work by forming hydrogen

bonds. The surface of untreated silica contains a large number of hydroxyl groups.

They can easily form a uniform three-dimensional network structure through mutual hydrogen bonding in oily systems, which can increase the viscosity

of the coating. This three-dimensional network structure will be destroyed when subjected to mechanical shear force, causing the viscosity of the coating

to decrease and restore good fluidity; when the shear force is eliminated, the three-dimensional structure (hydrogen bond) will recover by itself and the viscosity

of the coating will increase.

This characteristic of silica gives oily coatings very good storage and construction properties. Especially for thick paste coatings (such as ship paint), it can

ensure good fluidity of the coating under certain construction shear force and ensure the thickness of the coating film in one construction.

During the construction process, due to the rapid evaporation of the solvent at the edge of the coating, the surface tension is uneven, which makes it easy

for the coating to move to the edge. The silica network can effectively prevent the movement of the coating and form a thick edge. At the same time, it can also

prevent the coating from sagging during the solidification process, making the coating uniform. At the same time, silica can increase the low and medium shear

viscosity of the coating due to the formation of hydrogen bonds, thereby playing a thickening role.

Currently, in the domestic coating market, silica has been widely used in the coating industry.

Chemical Data

Application

1 Printing Inks, Rotogravure Printing Ink, Offset Printing Ink, Screen Printing Ink, Printing Packing Material.

2 Industrial Coating, Metal baking Coating, Decorative Coating.

3 Automotive Coating, Car Coating, Motorcycle Coating, Truck Coating, Bicycle Coating.

4 Wood coatings.

Anticorrosion Pigments, Inkjet Receptive Coating, Matting Agent