Application of Zinc Stearate Emulsion in Coatings | Mis-asia
The "zinc soap", also known as zinc stearate in the modern world, is widely used. Soap is understood in this context as a metal salt of a fat acid. This white solid repels water. It's insoluble with polar solvents like alcohol andether. However, it can dissolve in aromatic hydrocarbons (e.g. benzene) when heated. Zinc stearate, the strongest of all metal soaps for releasing mold, is also one of its most effective. It does not contain an electrolyte, and it has a hydrophobic property. Its primary applications are in the rubber and plastic industry where it serves as a lubricant, releasing agent, and can easily be integrated.
Zinc stearate is an emulsion that's used to coat wood in order to enhance sanding and fill in the gaps. It has high Transparency, which can impact the Transparency of the colors. This is especially true for transparent primers. Apart from the focus on Transparency and grinding, Zinc Stearate Emulsion can also influence the performance of wood lacquer by influencing oil absorption, Thickening and particle size.
There are several technical indicators within the wood primer for zinc stearate oil emulsions that can affect the paint's performance.
Paints with Inwood primers have a sanding efficiency that is essential. A common test is to apply the same paint formulation and sand the spray plate simultaneously. There is no standard. The grinding ability of zinc stearate-emulsion paints can be used by only one company. However, competition on the market encourages comparison of products as well as the development of the grinding aid for zinc stearate. How sanding performs directly effects the construction speed. It also affects how often the sandpaper is replaced, which in turn directly influences furniture maker's cost. Zinc stearate is generally found in primers between 5-10%. However, there are white textbooks that do not need zinc stearate to be used for grinding or low costs. They also don't include talcum powder and may not have the primer. To improve fast-drying or sanding, calcium carbonate was also added. Manufacturers of Grinding zinc stearate powder may not be the same. The grinding properties of different materials might differ from one another. If the final product's acid value and temperature are different from the one produced at the point of synthesis, this will affect the product in a greater or lesser extent. The process for producing zinc stearate should not be unstable. It should also be constantly improved to increase the grindability of the zinc-stearate mixture.
Transparency is a major factor in the visual appeal of transparent primers. Transparency is a major problem with transparent wood lacquers. This is because zinc stearate made by water cannot be used. While direct zinc stearate production may meet all requirements regarding purity, it is also required for high-quality manufacturing. Transparency is affected in different ways by production methods. Transparency may be drastically affected by slight differences in manufacturing processes. However, zinc stearate is rarely used in coatings. Although there are many producers of the product, most do not directly make it. This technology is used by zinc stearate businesses to make coatings. Transparency can be detected by dispersing some resin, solvent and zinc stearate. Next, a test sample and a standard sample are used to determine the amount of transparency.
The coating manufacturer does not approve Thickening. To make the final product, zinc stearate oil emulsion must be added to the surface. The factory specifications will also need to be determined. Therefore, the method for testing thickening of zinc stearate liquid is usually also tested with a rotary viscometer. It is called Thickening when the Dispersion has viscosity more than 500 mP in a few hours. The finished paint product that is produced by the paint manufacturer after thickening the zincstearate-emulsion emulsion will not be the same as the one used.
4. Oil absorption
It is not the same idea to have oil absorption or Thickening. Under the same conditions of adding the oil, the oil absorption is substantial and the product viscosity large. The error value of +-500mP*s is not exceeded by the thickness. DIN ENISO787-5-1995 is the standard test for oil absorption. Because it is unlikely to have an adverse impact on production, oil absorption in coatings for PU is generally not required. Paint manufacturers also need high oil absorption requirements. Some paint manufacturers may add more solvents but still want to lower the water volatilization. To avoid this, they need to look for products with high oil absorbency. Zinc stearate oil emulsion has a higher oil absorption than any other additives. Auxiliary.
5, Particle Size
A particle size indicates the size and shape of the zinc-stearate particles. This is typically measured using fineness. The easiest method is generally used. The scraper fineness gives the best results. The alkyd resin is usually mixed with a small amount zinc powder. Next, add some solvent to reduce the viscosity. Finally, test the alkyd resin with a scraper and fineness tester. Due to the fact that the resin-coated particles are a particular thickness, your test results might be slightly different from the real fineness. However, the method of testing fineness can be used as long as it is similar and repeatable. Zinc stearate must not be too fine in paint. Otherwise, it will have an effect on spray plates. Particles will be visible on the surface. Unpolished areas will also show unevenness. Zinc stearate gels are free from these issues.
The problem of dispersion is often mentioned by many paint manufacturers during the manufacture of their products. In normal conditions, dispersion of zinc-stearate emulsion isn't a problem. Some indicators, like stearic, can have an impact on dispersibility during the zinc stearate oil emulsion production. When the zinc value is too high or the temperature is too high in semi-finished products, it can cause poor dispersibility. This is because the worker is pressing too hard into the bag. The crystallization issue may also be possible if the humidity in the zinc powder exceeds 5%. This can lead to dispersion. Zinc stearate and zinc stearate gel emulsions also solve this problem well.
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