Cement foaming agent. Because rosin has carboxyl – COOH, adding alkali will produce saponification to produce abietic acid soap, which is called rosin soap. Its main component is abietic acid sodium, which belongs to the category of anionic surfactant. Pine soap is a brownish transparent paste with a water content of about 22%. After being diluted with water, it becomes a transparent and clear liquid without turbidity or precipitation. It has a unique odor of rosin, a pH value of about 8-10, and a surface tension of about (2.9-3.1) × 10N/m。 The United States first developed Pine soap in the 1930s. Since the 1950s, China has been producing imitation rosin soap and applying it to sizeable concrete reservoir dams such as Foziling, Meishan, and Sanmenxia, as well as some port projects, to improve its impermeability and frost resistance through micropores. After the rise of foam concrete, it began to be used as a foaming agent. Pine soap is made from rosin as the main ingredient by adding an alkaline solution and additives and reacting through heating. The production method is as follows: first, the alkaline solution is mixed into a specific concentration, related to whether the reaction can proceed smoothly. It is not a constant but is determined by the saponification coefficient. The saponification coefficient refers to the amount of alkali consumed by 1 kilogram of rosin. Select secondary or tertiary rosin that meets technical requirements, crush it into powder, and oxidize it in the air for some time. It can be used when its color deepens to a certain extent (based on experience). Note that rosin is not necessarily the highest quality, as first-grade rosin cannot be used. The saponification is affected because the primary rosin can quickly form crystals at 100 ℃. Add the alkali solution to the reactor, raise the temperature to 90~100 ℃, and slowly add rosin powder while stirring. It is easy to bubble and burst when adding rosin, so it is essential to observe and stop counting when it is about to boil over. After the material is added, it can react for a specific time in the emotional state, and the reaction time will determine the amount of sodium abietic acid generated. The appearance of the reaction solution can determine the reaction's endpoint. The method is to take out a small amount of the reaction solution and dilute it with hot water. If the answer is clear and transparent without precipitation, the reaction is complete and can be terminated. Finally, adjust the PH value by 8-10 to get the finished product. 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.