In the formulation, the main functions of surfactants are: one is to improve the emulsifying ability between the components, so that they can be more effectively mixed with each other; the other is to control the system to have proper surface tension during the foaming process to produce a good Bubble network structure, therefore, can also be called foam stabilizer. Polyester and polyether flexible foam have different raw material bases and different properties. Therefore, the selection and dosa ...

The oil-based glue defoamer is made of ether, fatty alcohol and multiple active additives through a special process. It is easy to disperse in water-based system, has strong self-emulsification, good defoaming, long-lasting foam suppression, and has special effects on water-soluble polymers and medium- and low-viscosity systems. It is especially suitable for latex-type water such as styrene-acrylic, ethylene-propylene, pure acrylic, vinyl acetate emulsion, and carboxyl butyl styrene. It has the ...

Curing is usually accomplished by condensation of silanols to form siloxanes. When the condensation reaction is in progress, due to the gradual decrease of the silanol concentration, the steric hindrance is increased, and the fluidity is poor, resulting in a decrease in the reaction rate. Therefore, in order to fully cure the resin, the reaction must be accelerated by heating and adding a catalyst. Many substances can catalyze the silanol condensation reaction, including acids and bases, soluble ...

 Surfactant and its propertiesSubstances that can significantly reduce the surface tension of water are called surfactants. In recent years, surfactants have developed rapidly, and their applications involve many fields, such as oil field development, daily chemical products, coatings, food, textiles, materials, etc. Surfactants have almost penetrated into all production and technical fields.Surfactants have two important properties. They are directional adsorption on various interfaces, an ...

As mentioned above, silicone resin has excellent thermal oxidation stability, cold resistance, weather resistance, electrical insulation, water repellency, anti-sticking and mold release properties. According to this, silicone resin is widely used as high and low temperature resistant insulating paint (including varnish, colored paint, enamel, etc.), such as impregnating H-class electrical and electronic coils for filling and insulation, impregnating glass cloth, glass wool and asbestos cloth, T ...

Properties and types of silicone adhesivesBasic properties of silicone adhesives Silicone adhesives have unique heat and low temperature resistance, good electrical properties and weather resistance, chemical stability, hydrophobic moisture resistance, oxidation resistance, workability, sealability, breathability The electrical properties change very little in a wide temperature range, and the dielectric loss is low. It can be made into high-grade sealing material, mainly used for sealing bondin ...

Solvent-free impregnating varnish is widely used in the VPI insulation treatment of motor coils in high-end fields such as high-voltage motors, high-speed traction motors, and spacecraft engines. Silicone materials have the advantages of high temperature resistance and corona resistance, and are more suitable for insulation in the above fields deal with. With the continuous development of my country's high-speed railway, subway, light rail, and magnetic levitation technology, insulating material ...

Technical fieldThe invention relates to a catalyst suitable for insulating impregnating varnish and a preparation method thereof. In particular, it refers to a solvent-free organic silicon insulating dipping varnish catalyst and a preparation method thereof. The preparation method of the catalyst is mainly used for preparing a solvent-free organic silicon insulating dipping varnish catalyst.Background techniqueInsulating impregnating varnish is a kind of insulating material, which is mainly used ...

Bright, supple hair has always been a symbol of youth and vitality. However, with the aggravation of air pollution, the acceleration of the pace of life, and the increase in the frequency of dyeing and perming, the health of the hair continues to decline. Beautiful hair becomes dull, frizzy, fragile and difficult to comb. At the same time, it is easy to get tangled and knotted when shampooing. . How to repair damaged hair and restore the smoothness and luster of the hair has increasingly become ...

Application and selection of defoamers for water-based coatings. The water-based paint defoamer is a composite product of organic polyether ester, mineral oil, and alcohol. It will not produce surface defects or affect the film-forming properties, and has a special effect on the water-based paint system.product manualUsing water instead of organic thorns to prepare paint is safe, inexpensive and hygienic. After the emergence of synthetic resins, water-based coatings developed rapidly. Water-base ...