Polydimethylsiloxane, also known as dimethylsilicone oil, commonly known as silicone oil, has typical polysiloxane characteristics, that is, the basic chain type is SI-O-Si bond,Si-O bond energy up to 1014.2kJ/mol. In addition, polysiloxanes have an unusual molecular chain structure, the main chain is an inorganic unit, and the side chain is an organic group! It has the dual characteristics of inorganic material and organic polymer. The unique structure of organosilicon compounds makes dimethylsilicone oil have good properties, such as good thermal stability, weather resistance, surface hydrophobicity, physiological inertia, dielectric property and low surface tension, glass transition temperature, etc., which has a wide range of applications in many fields, and is regarded as one of the most promising new "green materials" in the 21st century. However, due to the hydrophobicity of silicone oil, it is difficult to disperse in water phase, so its application in some aspects is limited, and the emergence of silicone oil emulsion solves this problem. In 1959, Hyde and others of Dow Corning Company in the United States publicly published the relevant patent technology for the preparation of silicone emulsion, and China began to study silicone emulsion in the mid-1970s.

Silicone oil emulsion is now widely used in cosmetics, hair care products, plastic processing and textile finishing, such as building surface waterproofing agent and leather care agent. Driven by the wide application of silicone oil emulsion, the research on the formulation of silicone oil emulsifier is also constantly improving, and the emulsifier formulation with convenient, low cost and better emulsion effect has a broader market prospect.