The combination of two types of surface control agents is more effective,but the following aspects should be paid attention to:

Waterborne Coating Formulation System - Surface Control Additives

2019-07-18

The types and functions of surface control agents include:
1.Improve flow and leveling
2.Reduce friction coefficient and increase slip
3.Enhanced scratch resistance
4.Anti-blocking
5.Enhance the arrangement of matte powder, etc.
6.Special feel, such as softness, etc.
7.Others such as improving the water resistance and stain resistance of the coating film
On the one hand, they balance the surface tension of the drying process to achieve uniform drying and flow, and reduce surface roughness; on the other hand, they concentrate on the surface during the drying process to form a smooth coating film, which increases the slip and other special properties.

There are two main types of such additives:

1.Organosilicon: This kind of surface control additive can effectively improve the scratch resistance and abrasion resistance of the coating film when it is added in a small amount. Generally, it has poor compatibility with the system. If it is not properly selected, it will affect the coating film. Gloss and adhesion between coating layers.
2.Wax emulsions, such as palm wax and polyethylene wax: affect the gloss of the coating to a certain extent, which is related to its particle size and distribution. The wax emulsion should be added to 2% to 8% of the total amount of the formulation to have obvious effect. Excessive wax emulsion affects the strength of the film and reduces the adhesion between the layers. The recommended optimum dosage is 3% to 5%. Putty does not use wax emulsion unless there is a special surface effect. In general, there is no need to add wax emulsion in the solid color paint. Sometimes wax emulsions can be replaced with wax powder.

The combination of two types of surface control agents is more effective, but the following aspects should be paid attention to:

1.Whether it seriously affects the gloss of the coating
2. Effect on adhesion between layers
3.Evaluation of foam stability

4.Storage stability of the system

Sinograce Chemical produces water based additives, such as thickener, crosslinking agent, wetting agent.

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