The most used are silicone oil (polydisiloxane) methylphenyl silicone oil (polymethylphenylsiloxane), polydimethylcyclosiloxane, silicone glycol copolymer, amine base Modified silicone oil, silicone protein interpolymer and methyl chlorosilicone oil, emulsified silicone oil and other modified water soluble or alcohol soluble silicone oils. Classified from the application, it can be used for hair care, skin care, and sun protection.


3.1.3 Application of silicone oil in cosmetics
Organopolysiloxanes have been widely used in skin care, hair care, beauty products, and special products such as antiperspirants and deodorants. Through a large number of long-term physiology, toxicology and genetic experiments, it is confirmed that some organopolysiloxane compounds are safe and reliable, and have excellent properties, such as light transmission and UV resistance, strong physiological inertia, non-toxic, no odor, and good. Surface activity, these characteristics make organopolysiloxanes more and more widely used in cosmetics. Polysiloxanes have many outstanding advantages for personal skin care products. Some people have obtained a viscosity of 315 × 10 -4 (m 2 / s) of methyl polysiloxane by comparison with various ingredients (Vaseline, white oil, etc.) commonly used in personal care products, in terms of spreadability and emollients. Sexuality and softness are the best in all three aspects. Moreover, silicone skin care will not block the pores on the surface of the skin and reduce the production of acne. The introduction of other functional groups in the silicone molecule provides a variety of modified polysiloxanes with superior properties. Polyether modified polysiloxane has good surface activity in organic system or in water. It can reduce the surface tension of liquid, play various functions such as wetting and softness, and can also resist static electricity and enhance gas permeability. When other cosmetic components are mixed, the component can be reduced in irritation to the skin and eyes, and is widely used in cosmetic cosmetics. Adding 0.5% to 1% of polyether modified polysiloxane to the degreaser detergent can increase the oil stain elution rate by nearly 30%. Amino-modified polysiloxane having a certain ammonia value, together with a suitable anionic surfactant, can be made into a transparent shampoo. Adding a small amount of amino silicone oil to the toothpaste can form a hydrophobic and stable film on the tooth surface, which can effectively prevent dental staining caused by smoking and dental caries caused by organic acid, and improve oral hygiene.