When the hydrophilic group contains quaternary ammonium salt, imidazole salt, pyrrole salt, pyridine salt and other structural units, it is a cationic silicone surfactant, especially the quaternized polysiloxane is the best conditioner for hair care. The quaternary ammonium salt type silicone surface is generally prepared by the addition reaction of epoxy silane and tertiary amine, the substitution reaction of hydrocarbyl silane with tertiary amine, the quaternization reaction of amino silane and the ring opening reaction of amino silane and epoxy compound Active agent. The quaternary ammonium salt type silicone surfactant prepared by the above method, such as MEHTA, has excellent performance.

BAUER and others synthesized cationic trisiloxane surfactants and studied their surface activity. It was found that such cationic silicone surfactants can reduce the surface tension of water to 21 mN / m at 1.0% (mass fraction) And it is believed that cationic silicone surfactants have good bactericidal properties and metal anticorrosive properties.