Commonly used negative Active Agents for industrial cleaning

General Purpose Plastic Scratch Resistant Agent manufacturer

Active Agents are a class of compounds that can reduce the surface tension of liquids, or liquid-liquid, liquid-solid phase interfacial tension. Therefore, surfactants have basic properties such as increased wettability, increased emulsification and dispersion, solubilization, foaming and defoaming, inhibition of metal corrosion, and antistatic properties, and can play an important role in the cleaning process. Surfactants can be divided into ionic surfactants and nonionic surfactants according to their composition and structure, and the former can be divided into anionic surfactants, cationic surfactants and amphoteric surfactants.

According to the amount and variety, the most used in cleaning agents are anionic surfactants, followed by nonionic surfactants, and amphoteric surfactants are used less. Cationic surfactants, generally not used in detergents, but the addition of cationic surfactants can make the detergent has the ability to sterilize and disinfect. When selecting surfactants, special requirements also need to be considered at the same time. For example, when the detergent is used in extreme conditions such as strong alkali, strong acid, high temperature and strong oxidant, sec-alkyl sulfonates, alkyl diphenyl ether disulfonates and fluorosilicone surfactants and other chemically stable surfactants can be used; when the detergent is required to be mild and non-irritating to humans and environmentally friendly, safer surfactants such as N-acyl sarcosinate, alkyl amine oxide and alkyl ether carboxylate can be used.

An-ionic surfactant

  • Anionic surfactants can be decomposed into lipophilic anions and hydrophilic metal ions in aqueous solution. In the molecular structure, the lipophilic group is mainly alkyl group mainly alkyl, isoalkyl, alkylbenzene, etc.; the hydrophilic group is mainly sodium salt, potassium salt, ethanolamine salt and other water-soluble salts. Anionic surfactants are the most used in cleaning agents, including fatty acid alkali metal salts (soap), alkyl sulfate salts, alkyl sulfonates, etc. are the most common. Their advantages are: cheap, with the use of alkali can improve the washing power, with the temperature increases have better solubility, the use of a wide range.
  • Fatty acid alkali metal salts, generally made by saponification of grease and alkali under heating conditions. The number of carbon atoms of fatty acids in oils and fats and the use of different alkali, you can make a very different soap properties. For example, the fatty acid carbon chain is longer, the freezing point increases, the hardness increases; fatty acid sodium and fatty acid potassium aqueous solution pH of about 10, fatty acid ammonium aqueous solution pH of about 8, can be used according to the requirements of the alkaline detergent selection. Sodium stearate, soluble in hot water and alcohol, dissolves more slowly in cold water and cold alcohol. Hard water resistance, bad acid resistance, poor foaming performance, good washing power at high temperature, weak washing power at medium and low temperature. It can be used as emulsifier with low irritation and mild detergent effect. Potassium laurate, also has good solubility in cold water, strong resistance to hard water, foaming power, can produce a lot of foam, washing power in warm water is better. Can be used as an emulsifier, is the main component of liquid soap and shampoo.
  • Fatty alcohol sulfate salts can be divided into fatty alcohol sulfate salts (AS), fatty alcohol polyoxyethylene ether sulfate salts (AES), and alkylphenol polyoxyethylene ether sulfate salts (less used due to poor biodegradability). These surfactants have good cleaning and foaming properties, are stable in hard water, and their aqueous solutions are neutral or slightly alkaline. Sodium lauryl sulfate is white powder, easily soluble in water, with strong foaming power, rich, white and fine foam, and excellent emulsifying and cleaning properties, used as raw materials for detergent, leveling agent for printing and dyeing industry, and flotation agent for minerals. Sodium lauryl polyoxyethylene ether sulfate, its hydrophilic size can be adjusted and controlled by the amount of substances added into polyoxyethylene. Therefore, sodium lauryl polyoxyethylene ether sulfate aqueous solution is better than sodium lauryl sulfate and can remain transparent even at low temperatures, making it suitable for the manufacture of transparent aqueous detergents. Its detergency is particularly strong and its own viscosity is high, which can also play a solubilizing role in the formulation.
  • Alkyl sulfonates, the most important class of anionic surfactants. It has better chemical stability and stronger surface activity compared to alkyl sulfates. In addition, sulfonates with different alkyl chain length or different alkyl structure composition exhibit different surface activities and can be used as emulsifier, wetting agent, penetrating agent, foaming agent, defoaming agent, etc., respectively.
  • Sodium alkyl benzene sulfonate, odorless, easily soluble in water, acid and alkali resistant, good thermal stability, non-toxic, non-burning to skin, can be mixed with non-ionic surfactants without affecting the original performance. Its detergency and emulsification ability are good, and it is stable to metal salts and oxides, especially in cold water and when its own concentration is very low, the washing effect is also good. Its disadvantage is its poor ability to prevent re-deposition of dirt, and it is suitable for wool and fabric washing.
  • Sodium α-alkenyl sulfonate has the best solubility at 12 carbon atoms, the best detergency at 15-17 carbon atoms and the best foaming power at 14-16 carbon atoms. α-alkenyl sulfonate has good synergistic effect with enzymes and has good compounding performance with other anionic surfactants and nonionic surfactants, which can reduce the amount of surfactants in the formula. It can reduce the amount of surfactant in the formulation.
  • Sodium oleoyl methyl taurate, also known as 209 detergent, is a slightly yellow colloidal liquid, easily soluble in hot water, with good cleaning, wetting and leveling properties, good affinity to human skin, good compatibility with anionic, nonionic and amphoteric surfactants, mainly used as cleaning agent for fabrics such as velvet and silk, printing and dyeing or bleaching and dyeing cooking treatment agent and household chemicals, etc.. When the product is placed below 10℃, it will be cloudy, and after warming up, it will be restored to its original state and the quality will not change.
  • Alkyl phosphate is a high-foaming and extremely mild anionic surfactant with excellent wetting effect, emulsification, antistatic effect and thickening effect.
  • Polyoxyethylene dodecyl ether phosphate, an anionic surfactant derived from a nonionic surfactant, is highly viscous and has strong oil removal power. Because of its high viscosity and can stay on the surface for a long time, this property is conducive to improve the cleaning effect, and the advantage is that it can be used for cleaning of vertical hard surfaces.

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