As a system of polyurethane, waterborne polyurethane uses water as the solvent, has the characteristics of green environmental protection, no pollution, and good compatibility, and is widely used in different application fields as paints and coatings, such as automotive coatings and electrophoretic paints, secondary paints, topcoats, original paints, repair paints, etc. With the development of industry, people's material demand and requirements have become higher, and the production requirements for waterborne polyurethane have also become higherWater-based polyurethane defoamer, the air bubbles generated by the polyurethane are eliminated. On November 24, Mr. Gao, an employee of a coating company in Hangzhou, Zhejiang Province, contacted us for consultation on waterborne polyurethane defoamers.
Application scenario diagram of waterborne polyurethane defoamer).
Bubbles in waterborne polyurethane can cause many hazards if left unchecked. Foam problems can affect the quality of performance of waterborne polyurethanes, making waterborne polyurethanes adhesive and durable. In the production process of waterborne polyurethane, foam not only affects the quality of the product, but also affects the appearance of the product, and the surface of the waterborne polyurethane coating is uneven and other defects.
Through the communication with the person in charge of the company, it was learned that there are many main reasons for the foaming of waterborne polyurethane, such as the foaming caused by the raw materials and additives of the waterborne polyurethane coating, and the foam will be generated because the raw material additives are surfactant additives. Some chemical reactions can also cause foaming, which reacts with the moisture in the polyurethane to produce gases, resulting in the formation of foam. In addition, blistering during the construction process may also be caused by improper operation, and the surface of the coating substrate is not cleaned and there are impurities.
Water-based polyurethane defoamerWater-based polyurethane antifoam is a composite product of organic polyether ester, mineral oil and alcohol, which is refined by a special process. It has the properties of self-emulsification, easy dispersion, strong versatility, good defoaming, and long-term foam inhibition. It does not produce surface defects or affect film-forming, and has a special effect on water-based coating systems. Compared with ordinary defoamers on the market, it is easy to disperse, fast to defoam, long-lasting foam inhibition, especially for water-soluble polymers and medium, low and high viscosity systems, which can eliminate large bubbles and fine foam in emulsions, with long-lasting foam inhibition and good miscellaneous dispersibility.