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Wetting and dispersing additives | Rheological additives | Defoamers and air release agents | Surface additives | Substrate wetting agents Tension-reducing. Anyone processing a liquid would like for it to spread evenly on a substrate, and this process can be controlled. Our substrate wetting agents reduce the surface tension of the liquid, enabling optimum coating. Why do raindrops drip off and not cover the pane as a film? We have developed different additives appropriate for the Because a complex interaction takes place at the interface formulation in which they are to be active. Select substrate between the water and the window pane. This interaction wetting agents can also be used in products that come into decides whether or not the liquid will wet the solid body. contact with food. Specialists refer to this as the surface tension. It differs from In coatings or paints, our additives prevent the formation of material to material. craters and create a smooth surface. They can also ensure that old coatings can be easily painted over or recoated. Reducing tension - controlling interplay When all is said and done, our substrate wetting agents The interplay can be controlled. We use our substrate facilitate the painting, spraying, or coating process. wetting agents to reduce the surface tension of a liquid. For Plastics manufacturers also profit from our wetting additives. a coating to properly wet out the surface of a substrate, its The producers of thermoplastics, for example, can work at surface tension must be lower than the surface tension of lower temperatures and thus increase their throughput. The the substrate. reason for this: Our additives are better at wetting the fillers. Smooth surface without craters Our range of substrate wetting agents has differentiated over the years. A key factor in the differentiation is the solid body that is to be wet out. Examples include; pigments, packing, wood, steel, and glass fibers. Our additives take into consideration the molecular structure of the liquids. Substrate wetting agents – a selection •BYK®-333 is used in printing inks, in processing paper surfaces, as well as in adhesives and sealants. It is permitted for use in the manufacture of products that come into direct food contact. •BYK®-3455 is a fluorine-free, silicone-containing additive for improving substrate wetting. •BYK®-3550 is a substrate wetting and leveling agent that is based on a silicone acrylate copolymer for solvent-borne Poor surface wetting Perfect surface wetting with coatings. without additive BYK additive BYK. Competencies. 15


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