In the process of industrial production, many harmful foams will be produced, and it is necessary to add disinfectants. Foaming agent. There are many types of defoaming agents, such as oil silicone, polyether, silicone and ether grafted technology, amine-containing, imine-containing and amide-containing ones, which have faster defoaming speed, longer foam suppression time and wider range of applicable media. , even the characteristics of harsh media environments such as high temperature, strong acid and strong alkali.
Common types of defoamer include: natural oils (i.e. soybean oil, corn oil, etc.), high-carbon alcohols, polyether defoamer, silicone , polyether modified silicon. Paint production and construction will produce bubbles to varying degrees. The generation of bubbles hinders the smooth progress of production and construction, and at the same time brings defects to the finished coating film. The correct selection of appropriate defoaming agents can ensure the normal progress of coating production and construction.
Defoaming agents for water-based architectural coatings are divided into non-silicon and silicon-containing types. Conventional defoaming agents consist of the following components;
Active substance: It plays the role of breaking and defoaming, and has low surface tension. Representative substances include animal and vegetable oils, hydrophobic silica, higher alcohols, etc.
Diffusion agent: Wetting emulsifier to ensure that the defoaming droplets diffuse to contact the bubble film and spread. There are non(octyl)phenol polyoxyethylene ethers, soap salts, etc.
Carrier: It helps to combine active substances with the foaming system, and is easy to disperse into the foaming system. Combining the two has low surface tension, helps suppress foam, and can reduce costs.
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