Pigments, fillers and flame retardants are important components of many plastics formulations, giving the product the desired appearance or the desired technical features.
The problem: The particles are usually too hydrophilic, making it difficult to mix them with the polymer matrix. Many manufacturers of these raw materials therefore rely on additives from Evonik, which make targeted changes to the surface properties of the particles so that they are easier to process.
Organically modified siloxanes such as TEGOPREN® 6875 or TEGOPREN® 6879 are used by the manufacturers of pigments, fillers, and flame retardants to make the surface of their particles more hydrophobic. A further advantage: In contrast to other agents, the special additives from Evonik also improve the dispersion properties of the products. This means that compounders can work the particles into the polymer matrix more easily.
Products such as TEGOPREN® 6875-45 (emulsion) can be stirred into the filter cake or slurry after grinding and before drying. This product can be applied in a spray dryer. The 100% version of it, TEGOPREN® 6875 (colourless liquid), withstands extremely high temperatures, such as those found in steam mills.