Organosilicon defoamer formula is not good
Silicone defoamer formula is made of silicone grease, emulsifier, bactericide, stabilizer and appropriate amount of water.
Physical form is divided into oil, solution, emulsion and solid. According to the composition: silicone oil, composite, silicone polyether;
1) the main components of silicone grease in the formula are polysiloxane, silica or other non oil soluble polymers.
2) the carrier in the formula plays the role of supporting medium for silicone grease, which is convenient to penetrate defoamer into the foaming system. The carrier can be hydrocarbon oil or water or fatty alcohol or solvent, etc;
3) the main component of silicone defoamer, silicone grease, is insoluble, but in the process of defoamer, it must be quickly emulsified and can disperse into the foaming system or spread out on the surface of the foaming system. Therefore, emulsifier must be added to the defoamer production to help the defoamer contact the surface faster and more, so as to improve the development effect of defoamer. The commonly used emulsifiers are nonionic surfactants, such as tween, Op or polysilicon surfactants;
4) the bactericide in the formula is to prevent the product from being damaged by bacteria during storage. It can be Carson and other substances;
5) in the formula, the defoamer is kept stable in the carrier, and the product has certain viscosity. For example, the water-based thickener can be carboxymethylcellulose;
The process of silicone defoamer is the reverse process of foam stabilization. From the point of view of mechanism, it includes two aspects: one is to inhibit foam generation, the other is to eliminate bubbles that have been generated. Two. Accordingly, silicone defoamer is the material that can change the interface state of the system and destroy or inhibit the foam. As a good organosilicon defoamer, it must have the following basic conditions: it is insoluble in the foaming liquid, the surface tension is lower than the foaming liquid, and it can be quickly dispersed in the foaming liquid. Shanghai Boyi and chemical products belong to this type.
Organosilicon defoamer is monosodium glutamate in the industry, and it is also said to be a catalyst of science and technology. The new organosilicon defoamer has higher surface activity, wide application, long-term foam suppression, strong defoaming ability, less consumption, non-toxic, no side effects, good stability, long-term storage, convenient transportation, economic and practical.