Fluorosilicone oil used as defoamer
Since the surface tension of fluorocarbon-based silicone oil, especially long-chain perfluoroalkyl silicone oil, is lower than that of other silicone oils, the defoamer formulated with it is more effective in reducing the surface tension of various foaming systems, and the effect is better than other silicone oil defoamers. foaming agent. Both homopolymeric and copolymeric fluorocarbon-based silicone oils can be used as defoamers. Fluorosilicone oil defoamers can be used in petroleum, textile, synthetic rubber and resin industries, paint and ink industries, food processing and fermentation industries, and medical applications.
Application of secondary products of fluorosilicone oil
Fluorosilicone Grease, Fluorosilicone Paste
Fluorocarbon-based silicone oil can be used as base oil to prepare fluorosilicone grease and fluorosilicone paste by adding thickeners, stabilizers and modifying additives. When trifluoropropyl silicone oil is used as a grease base oil, it can significantly improve the steel-steel boundary lubricity. It can be used alone or mixed with dimethyl silicone oil or methyl phenyl silicone oil. Its lubricity is obviously better than that of chlorophenyl silicone oil, and even better than mineral oil grease under high load. Thickener can be divided into lithium soap series (fluorosilicone grease) or white carbon black and silicone resin (fluorosilicone paste) according to the product form. The crude product obtained by mixing base oil, thickener and modifying additive must be moved into a three-roll machine for further grinding to obtain a uniform fluorosilicone grease or fluorosilicone paste without coarse particle thickener or modifying additive .
Fluorosilicone grease is suitable for -70 ~ 252 ℃, and can be used for the lubrication of high-speed and heavy-duty bearings exposed to chemical reagents, the lubrication and sealing of valves exposed to corrosive compounds, etc. Fluorosilicone paste can be used as high-vacuum silicone paste, and can be used for lubrication and sealing of parts exposed to benzene solvents.
