Nonionic silicone surfactant  
Silicone surfactants are mainly used in personal care products with polyether silicone surfactants [5].
The polyether silicone oil has the characteristics of water solubility, emulsifying property, surface activity and physiological inertness, and can be prepared into a personal care product to obtain a colorless, odorless, non-irritating to the human body, and does not affect the normal breathing and sweating of the skin. Skin care products, it can also reduce the surface tension of cosmetics, help spread on the skin and hair, have moisture retention and retention, give hair a luster, anti-static, good resistance to bacteria, is an excellent cosmetic auxiliaries, Moreover, the role has become more and more prominent, and it has become a kind of product that is developing fast and worthy of attention.

Cationic polysiloxane surfactant
Cationic silicone surfactants, especially quaternized polysiloxanes, are the best conditioning agents for hair care.
Due to the high molar mass, it can be compatible with anionic surfactants, has no irritation to human skin and eyes, has certain antibacterial ability, does not produce free ammonium in alkaline solution, and has stable properties. The macromolecules of this product contain hydrophobic long-chain polysiloxane chain links, which make them have excellent smoothness and softness. At the same time, they have strong adsorption to skin and hair due to positive charge, and are resistant to hair. Electrostatic conditioning.

Anionic silicone surfactant
Anionic silicone surfactants include carboxylic acid type, sulfonic acid type, sulfate type and phosphate type, which can be obtained by a hydrosilylation reaction of a corresponding ester having an unsaturated bond with a hydrogen-containing silicone oil, or an epoxy resin. Base intermediate conversion. Phosphate silicone surfactants are the most common, and the products are phosphorylated by silyl alcohols, and then neutralized and refined as needed. The polysiloxane phosphate has both emulsification, foaming property, mild washing property of a phosphate group, nonionic property such as a cloud point of a polyether, and affinity of a silicone to skin and hair. It can be used as a highly effective W/O emulsifier, solubilizer, water-soluble foaming agent, detergent, emollient and hair conditioner for cosmetics. Polysiloxane phosphate surfactants have emulsifying properties and moisturizing properties, and are mainly used in moisturizing skin care products and conditioning hair care products. In hair care products, phosphate esters can delay the accumulation of static electricity and accelerate the discharge. Polysiloxane has good affinity and conditioning for skin and hair, so it can improve the dry and wet combability of hair.

Application of powder treatment agent in cosmetics
In order to further improve the properties of the powder, the surface of the powder is treated with high molecular weight DPMS (dimethylpolysiloxane). The powder has excellent hydrophobicity and high durability, good cosmetic surface and good adhesion to the skin. , has a moderate sticky feeling and good use. A new powder treatment method has been developed in recent years, and the new method is to contact the cyclic methylhydrogenpolysiloxane with the powder at a pressure of 100 ° C or less under normal pressure. Due to the catalytic activity of the surface of the powder, a polymerization reaction can be formed to form a network polymer, and as a result, an ultrathin film is formed on the surface of the powder, and the film can be introduced into a functional group by an addition reaction. If the introduced functional group is an alkyl group, a hydrophobic powder is formed; if it is a hydroxyl group and a polyoxyethylene group, a hydrophilic powder is formed.

Conclusion
In the future, the application trend of silicone materials in cosmetics will focus on hair cosmetics, especially in the direction of hair care masks, 2-in-1 shampoos and hygiene products. In addition to maintaining the original excellent properties, the novel silicones developed in the future must have additional properties such as film formation, conditioning, moisturizing effect and ultraviolet absorption capability.

According to relevant information, China's personal care market is currently one of the fastest growing regions in the world. From 1997 to 2006, the average annual growth rate exceeded 10%. By 2015, China became the second largest personal care market in the world. . Silicones come in the form of liquids, emulsions, resins, waxes and blends and are therefore an important functional ingredient in personal care products. It can be seen that the application prospect of silicone products in personal care products is good. With the development of fine chemicals industry, the market of personal care products will become larger and larger, and silicone products will be further developed. More, the scope of application is also wider and wider. In the daily chemical industry, the main use of silicone is non-toxic, mild, soft and smooth.