Introduction and application of defoaming agent for sewage treatment The defoamer for sewage treatment is a defoamer with polysiloxane as the main material, which is developed by introducing advanced foreign technology and equipment and combining with water treatment system. It can quickly eliminate the foam generated by sludge, water treatment agents, bactericides, etc. It can…
Requirements for defoamers in pigment printing The characteristics of the pigment printing process require that the defoamer not only has excellent defoaming and antifoaming effects, but also has good compatibility with the printing paste and cannot affect the leveling of the printing paste, otherwise it will affect the smoothness of the surface and cause problems…
Types and functions of polyether defoamers 1、GP type defoamer It is made by addition polymerization of propylene oxide or a mixture of ethylene oxide and propylene oxide with glycerol as the initiator GP type defoamer has poor hydrophilicity and low solubility in the foaming medium, so it is suitable for use in thin fermentation broth.…
The production principle of defoaming agent Preparation of defoamers High-carbon alcohols High-carbon alcohols are linear molecules with strong hydrophobicity and weak hydrophilicity, and are effective defoamers in water systems. In the early 1970s, Soviet scholars conducted experiments in aqueous solutions of anionic, cationic, and nonionic surfactants and proposed that the defoaming effect of alcohols is…
Types of polyether defoamers 1、GP type defoamer It is made by addition polymerization of propylene oxide or a mixture of ethylene oxide and propylene oxide with glycerol as the initiator GP type defoamer has poor hydrophilicity and low solubility in the foaming medium, so it is suitable for use in thin fermentation broth. Its antifoaming…
Application of defoamers in architectural coatings In the production of architectural coatings, the presence of additives such as emulsifiers, dispersants and thickeners in the formula not only generates a large number of bubbles, but also stabilizes the bubbles, resulting in a large number of bubbles in the architectural coatings. During the film-forming process, if the…
Defoamer selection and evaluation methods The defoamer must be able to spread quickly on the foam surface and penetrate quickly, causing the foam to break quickly. The commonly used defoamer types at present are silicone and polyacrylate. Silicone defoamers are usually polysiloxane-type. For example, polydimethylsiloxane containing acrylate functional groups and polyether-modified polydimethylsiloxane. Silicone has become…
Application of Defoaming Agent in Dyeing and Finishing Production During the production and processing of knitted fabric printing and dyeing, foaming causes the fabric to float on the water surface, and in severe cases, cloth blocking occurs (overflow jet dyeing machine). At this time, people often hope to use low-foaming surfactants to meet the needs…
