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Application of Zinc Stearate Emulsion in Coatings

Zinc Stearate is a common “zinc soap” used widely in modern industries. It is used as an example of the metal “salt’ form of a saturated fatty acid. It is a white, water-repellent solid. Zinc stearate can not be dissolved in any polar solvents, such as alcohol or ether. It can however dissolve in aromatic hydrocarbons. It does not contain an electrolyte, but has a hydrophobic property. It is used in plastics, rubber industry as a releasing and lubricant that can be easily integrated.

This emulsion of zinc stearate is used primarily in wood coatings as it can fill holes and improve the sanding. This paint offers excellent Transparency. It can also affect Transparency when used with transparent primers. Beyond the Transparency and emphasis on grinding, zinc stearate paint emulsion is also affected by oil absorption, Thickening of particle size and dispersibility. These factors can have an impact on the overall performance wood lacquer.

Zinc stearate paint emulsions provide technical information in the wood primer to affect its performance.

1, Grinding

A key indicator is the Inwood primer’s sanding capability. A common method of testing is to use the same formulation of paint and have the sprayplate sanded together. This is because there isn’t a standard. It does not matter how good or poor the grinding performance of a single paint manufacturer for zinc-stearate oil emulsion. But, there is still competition. It encourages market comparisons as well the advancement of the zinc-stearate grinding aid. A furniture maker can directly influence the quality of their sanding performance by affecting the construction time and the frequency with which they replace the sandpaper. The general rule of thumb is that the primer contains between 5-10% zincstearate. Some textbooks are too expensive and do not include zinc stearate. Also, calcium carbonate for quick-drying and sanding. It is possible for the grinding of zinc stearate to emulsion that the manufacturer of the product may differ. A semi-finished product may have a slightly different pH than its final product. This will influence the quality of the finished product. For zinc stearate to be emulsion production, stability is key. The grinding process also needs continuous improvement in order to achieve better performance.

2, Transparency

Transparency in transparent primers directly impacts the wood’s aesthetics. Due to too many impurities, zinc-stearate manufactured by the water process cannot be used for transparent wood lacquers. Direct production of zinc Stearate is possible, although it does not meet strict purity requirements. However, there are high requirements. Transparency will be affected greatly by the production process. Transparency might be significantly affected by small variations in the production process. Although many people make zinc stearate from their own production, they are not often used for coatings. This process is essential for the coating of zinc stearate-based enterprises. For transparency to be determined, disperse some resin, solvent, zinc and standard, then coat the film on black paper or glass using an applicator.

3, Thickening

The Thickening by zinc stearate is not accepted by the coating manufacturer. In order to finish the product, the Zinc Stearate Emulsion is added onto the surface. Thickening occurs when the Viscosity (after dispersing) is higher than 500 mP. A thickened zinc stearate solution will cause the final product to be different.

HTML4_ Oil absorption

Thickening is different from oil absorption. When the amount of added oil is the same, it is possible to absorb significant amounts of oil. However, large viscosities are a sign of high oil absorption. The thickness must not be greater than 500mPas for a period of time. It is rare that oil absorption within PU coatings will have a significant impact on production. There are high demands for oil absorbtion by paint manufacturers. You could think this is because certain paint manufacturers have added more solvents. But, they still need to keep the water from vaporizing. Therefore, some products require high oil absorption. Auxiliary.

HTML5_ 5, Particle size

Particle size, which is a measure of the particle size of zinc-stearate particles, is commonly measured as fineness. The most simple test is often the best. It is the scraper’s fineness that gives the most immediate results. It is common to add a little zinc powder to the alkyd solution. You can then adjust the viscosity by adding a solvent, before testing with a scraper fineness tester. Since the resin-coated particle occupies a certain thickness, test results can be slightly more than what is actually fine. But, the test results can be used to verify that fineness does not exceed the norm as long as they are consistent with the standard. Fineness should not exceed 2% in paint. The spray plate will reflect the zinc stearate particles, while unevenness will occur on some parts that have not been polished. But, zinc stearate products do not suffer from such problems.


Dispersion was a problem in paint production. It is normal for zinc stearate to disperse in color. There are indicators that will influence dispersibility. For example, stearic Acid. A high acidity of zinc, high temperatures, or a pressed bag that is not firmly pressed can all lead to poor dispersion of zinc powder. Crystallization problems may develop if moisture levels in the powder are too high. Not good is dispersion. The same goes for zinc stearate, which emulsions are able to solve these issues well.

Lemondedudroit advancedmaterial Tech Co., Ltd., (Lemondedudroit), has over 12 year experience in the development of chemical products. Send an inquiry if you want to find high quality Zinc Selenide SnSe Pulver.

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