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Anionic surfactant type foaming agent for cement foaming agent

There are more than 10 types of anionic surfactants that can be used as foaming agents, but the most commonly used, cost-effective, and readily available ones are alkyl benzene sulfonates. Its representative is sodium dodecylbenzene sulfonate. It is prepared from alkylbenzene with an extended chain alkyl group (CH3CH2CH2… CH2 CH2…) on the benzene ring, using concentrated sulfuric acid, fuming sulfuric acid, or liquid sulfur trioxide as sulfonating agents. The practice has found that when the carbon atom number of the alkyl is close to 12, it is most suitable and performs best. This alkyl group can be a branched chain containing 12 carbon atoms and various alkyl groups. The synthesis process of sodium dodecyl benzene sulfonate is relatively simple, mainly using propylene as the raw material to polymerize synthesize the tetramer dodecane (C12H24) of propylene copolymerizes with benzene to form a complex mixture of dodecyl benzene. After sulfonation with fuming sulfuric acid, dodecylbenzene sulfonate is formed and neutralized with sodium hydroxide to form a sodium salt. Sodium alkylbenzene sulfonate was first produced by the United States in 1936. At that time, because kerosene was used as raw material for production, the foam was not good, and after several improvements, it became the most widely used surfactant. Its appearance is white or light yellow powder or sheet-like solid, easily soluble in water to form a semi-transparent solution, relatively stable to alkalis and dilute acids, and decomposes at 240 . The surface tension of sodium alkyl sulfonate is approximately 2.96 × 10N/m, with high surface activity and good foaming power at low concentrations. If the foaming force is 84 mm at a concentration of 0.05%, even lower concentrations can be used for foaming. Moreover, its foaming speed is breakneck, and it can foam instantaneously. The foam volume is large and prosperous. When properly foamed high-foaming surfactant, its height can be greater than 200 mm. Rapid foaming and a large amount of foam are the outstanding advantages of sodium alkyl sulfonate and the main reason why it is popular with some people. If you are looking for high quality, high purity and cost-effective cement foaming agent, or if you require the latest price of cement foaming agent, please feel free to email contact mis-asia.

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