Polyurethane foaming refers to the phenomenon that bubbles or foam are produced in raw materials during preparation or application,and these bubbles may affect the quality and performance of the product. Using polyurethane defoamers can help solve foaming problems.
Polyurethane defoamer is a chemical substance used to reduce or eliminate the foaming phenomenon of polyurethane. It can destroy the surface tension of bubbles, promote the bubbles to break and dissipate, thus preventing bubbles or foam from forming during the preparation or application of polyurethane. Common polyurethane specific defoamers include organic silicon defoamers, non ionic defoamers, anionic defoamers, and cationic defoamers. They can choose appropriate defoamers based on the characteristics of the polyurethane system and the severity of foaming problems.
Usage method and precautions for polyurethane defoamer:
1. Select appropriate defoamers based on the specific polyurethane system and the characteristics of foaming problems.
2. The addition time and method of defoamers also need to be noted, usually gradually added during the preparation process to avoid adding too early or too late.
3. Add according to the recommended dosage of defoamer, excessive use may have a negative impact on product performance.
4. The addition time and method of defoamers should be adjusted according to the specific situation, usually gradually added during the preparation process.
5. Pay attention to the mixing performance and compatibility of defoamers to avoid adverse reactions with other additives.
Polyurethane defoamer is a product that quickly solves the foaming problem of polyurethane materials. It is developed based on different industries, properties, and foaming characteristics, and can quickly and effectively solve the foaming problem of high viscosity and effective water-based polyurethane products.It also has excellent defoaming effect on micro foam and large foam, and is an indispensable defoamer in polyurethane, But when using,appropriate defoamers should be selected based on the specific situation and the correct usage method should be followed.
