Chinese scientists synthesized a cationic polyether-modified organosilicon quaternary ammonium salt shampoo conditioner through addition, ring-opening and quaternization reactions. They used chemical titration to measure the mass fraction of unreacted active hydrogen and evaluated the polyether-modified organosilicon. The compatibility of quaternary ammonium salts and anionic surfactants and their impact on the foaming power of shampoo systems were studied. It was found that polyether-modified organosilicon quaternary ammonium salts have good compatibility with anionic surfactants. Foams well in compound solution.
They studied the effect of cationic polysiloxane quaternary ammonium salts as hair conditioners on dry and wet combing effects of hair, and found that the emulsion particle size was mainly distributed around 10 μm; 2% mass fraction of cationic polysiloxane was added to the shampoo. The oxalkyl quaternary ammonium salt improves the wet combing effect by 28.0% and the dry combing effect by 21.2%, which has better conditioning performance than ordinary emulsified silicone oil. In their study on the antibacterial effect of polysiloxane quaternary ammonium salt microemulsions in cosmetics, Mao Lutian et al. found that polysiloxane quaternary ammonium salt microemulsions and polysiloxane quaternary ammonium salts with a mass concentration of 1.0 g/L The antibacterial rates of ammonium salt emulsion and polysiloxane microemulsion against Escherichia coli are 100.00%, 91.16% and 84.66% respectively; the minimum inhibitory concentrations of polysiloxane quaternary ammonium salt microemulsion are 1.0 g/L (inhibitor Escherichia coli) and 0.8 g/L (Staphylococcus aureus). Because it has bactericidal and deodorizing properties, it can also be added to antiperspirants. The macromolecules of cationic silicone surfactants contain hydrophobic long-chain polysiloxane links, which give them excellent slipperiness and softness; at the same time, the positively charged quaternary ammonium salts have strong effects on skin and hair. Adsorbent and has anti-static conditioning properties on hair.
