company news about Why should zinc stearate be added to primer?

In the paint industry, we all know that zinc stearate is often added to the primer, so what role does zinc stearate play? Zinc stearate is mainly used in wood primer coating, filling effect, improve polishing, and good transparency, affect the transparency of the coating is small, especially suitable for transparent primer. Zinc stearate in the paint in addition to the impact of polishing and transparency, there are some other factors, such as oil absorption, thickening, particle size, dispersion and so on the comprehensive performance of wood paint also have an impact. The main influencing factors of zinc stearate in wood paint are summarized as follows:

1, sanding in wood primer, sanding in paint is a very important index, the usual test method is to use the same coating formula, while the spray board in the same time to sanding test.

2, transparency in transparent primer, transparency directly affects the aesthetic degree of wood.

3, thickening production of coating manufacturers of zinc stearate thickening is not accepted, because zinc stearate added to the coating to make finished products, its viscosity is determined, so the thickening of zinc stearate is not or rarely used in the coating.

4, oil absorption coating generally requires low oil absorption, so in the case of formula determination, the lower the oil absorption, the PE paint from production to use will reduce or avoid the risk of curing due to excessive viscosity.

5. Particle size Particle size is the size of zinc stearate particles, measured by fineness. In the coating, the fineness of zinc stearate can not be too large, too much will cause a certain impact on the aesthetic degree of the film.

6, dispersed zinc stearate generally will not affect the dispersion of the coating, but in the production process of zinc stearate, there will be some indicators of the impact on the dispersion, such as acid value is too high, semi-finished product temperature is too high, zinc powder moisture is too high crystallization. This also raises higher requirements for the production of zinc stearate, so it is necessary to purchase stable quality of zinc stearate, such as Deyang Jinyuan Technology zinc stearate.