Sodium tripolyphosphate is commonly found in industrial cleaning agents and daily general detergents. At the same time, it is also an indispensable and excellent auxiliary agent in detergent. The content of most detergents is 10 ~ 50%, which can play a good synergistic effect with sodium alkylbenzene sulfonate, thus improving the cleaning effect of sodium alkylbenzene sulfonate. It is a large amount of inorganic additives used in industrial cleaning agents. Today, let’s take a look at what happens when it meets dirt.
1. Chelation of metal ions: Harding metal ions (mainly Ca2+ and Mg2+) are generally contained in daily washing water. In the washing process, they will form insoluble metal salts with the active substances in soap or detergent, which will not only increase the consumption of detergent, but also make the washed fabric have unpleasant dark gray color. It has the excellent performance of chelating hard metal ions, which can eliminate the adverse effects of these metal ions.
2. Improving peptization, emulsification and dispersion: dirt often contains human secretions (mainly protein and fatty substances) or industrial oil pollution, and also contains sand and dust from outside. However, it has swelling and solubilizing effects on protein, which has the effect of peptization. It can promote emulsification for fatty substances and disperse and suspend solid particles.
3. Buffering effect: Sodium tripolyphosphate has a large alkaline buffering effect, which can keep the pH value of the washing solution at about 9.4, thus facilitating the removal of acidic dirt.
4. Prevent caking effect: powder synthetic detergent has hygroscopicity. If stored in a place with high humidity, caking will occur. Caked detergents are extremely inconvenient to use. The hexahydrate formed after sodium tripolyphosphate is absorbed water has the characteristics of dry. When there is a large amount of sodium tripolyphosphate in the detergent formula, it can prevent the agglomerating phenomenon caused by moisture absorption and keep the dry and granular form of the synthetic detergent.
Sodium tripolyphosphate is also a surfactant, which can reduce the surface tension of oil and water, so as to improve the wetting ability and decontamination ability of cleaning agents and increase the emulsification degree of oil. For details, please consult Yucai Chemical Foreign Trade Salesman.