A foam is a dispersive system with a large number of bubbles dispersed in a continuous phase of liquid, the dispersed phase of which is a gas.Foam often occurs in papermaking, coating, chemical industry, printing and dyeing, medicine, water treatment and food processing.If not properly restrained, foam will reduce the effective load of equipment, prolong the reaction time of the production process, and increase energy consumption.

    Dimethylsilicone oil manufacturers think that the most effective way to eliminate foam is to use defoaming agent, it can inhibit the production of foam, eliminate the generated foam, an effective defoaming agent can not only quickly make the bubble burst, but also in a considerable time to prevent the generation of foam.What kind of conditions can be used as defoaming agent?Generally speaking, the following conditions must be met:

    1, the surface tension is lower than the defoaming medium;

    2, insoluble in the defoaming medium;

    3, with the defoaming medium has a certain degree of affinity, good dispersion;

    4, has a good chemical inertness and volatility to be small.

    At present, there are many kinds of general antifoaming agents, and different production processes have different requirements for antifoaming agents.According to the composition can be divided into silicone, polyether, grease, fatty acid, phosphate ester, alcohol, ether, amine, etc., silicone defoaming agent because of its wide application, small surface tension, good thermal and chemical stability, physiological inertia and strong defoaming ability, the proportion of practical applications is increasing.