Anionic surfactant

The anionic surfactant is ionizable when dissolved in water, and the surface active portion exhibits a hydrophobic anionic action. Typical anionic surfactants are soaps, alkylbenzene sulfonates, alkyl sulfonate salts, alkyl sulfonates, alkyl sulfates, fluorochemical fatty acid salts, polysiloxanes, fatty alcohol sulfates, Fatty alcohol polyoxyethylene ether sulfate, α-alkenyl sulfonate, fatty alcohol polyoxyethylene ether phosphate, alkyl alcohol amide, alkyl sulfonate acetamide, alkyl succinate sulfonate, alcohol amine An alkylbenzene sulfonate, a naphthenate, an alkylphenol sulfonate, a polyoxyethylene monolaurate or the like. Anionic surfactants are generally poorly soluble at low temperatures, and if the concentration of the solution continues to increase, a certain limit will be reached and then the hydrating active agent will be precipitated. If the temperature of the water is raised, the solubility is rapidly increased due to the dissolution of the micelle at a certain temperature, and the temperature at this time is called a sudden change point. This property is unique to ionic surfactants. Anionic surfactants have a limited variety of hydrophilic groups, but a wide variety of hydrophobic groups. Important hydrophilic base materials are carboxylic acids, sulfonates, sulfonic acids, phosphates, etc.; water-based raw materials are animal and vegetable oils and their hydrolysates, such as fatty acids, higher alcohols, and synthetic alcohols and alkanes based on petrochemicals. Base benzene, α-olefin, etc., animal and vegetable oils include coconut oil, castor oil, cottonseed oil, palm oil, sperm whale oil, butter and fish oil, etc., and natural processed products such as rosin acid and naphthenic acid are not used. less. The anionic surfactant has good effects of penetration, wetting, emulsifying, dispersing, solubilizing, foaming, decontaminating, antistatic, and smoothing. Anionic surfactants are the most abundant of the surfactants and cannot be used in combination with cationic surfactants, which lose their effectiveness due to the formation of precipitates in aqueous solutions. Can be used in combination with amphoteric and nonionic surfactants. Often used as detergents, wetting agents, emulsifiers and dispersants. Widely used in industry. Used in daily chemical industry for various detergents; in cosmetics, foaming agents, dispersing agents and emulsifiers for shampoos, body washes, various creams, toothpastes, etc.; as an emulsifier in foods, Defoamer, dispersant, preservative, solubilizer, thickener, protein stabilizer, etc.; feed emulsifier, dispersant, stabilizer; used as emulsifier, thickener, preservative, antioxidant, etc. in medicine; Used as an oil agent, dyeing aid, bleaching agent, soft processing agent in the textile industry; as an emulsifier, spray and dispersant in pesticides; as an asphalt emulsifier in highway and urban road construction, such as tall oil Sulfonate; used as cement water reducer in civil engineering; used as emulsifier, oil displacing agent, lubricant, sanding agent, water blocking agent, demulsifier, corrosion inhibitor, resistance reducing agent, water loss in oil field development Used as an emulsifier and fuel additive in petroleum products; as an emulsifier and antistatic agent in emulsion polymerization; metal cleaning agent; mine flotation agent; wastewater treatment agent; Brightener, dispersant, pitting inhibitor, can be added to the copper plating solution and In nickel plating liquid; other applications such as coatings, inks, transportation, shipbreaking, etc.