Silicone has the unique properties of being compatible with the skin, having good compatibility with the substrate, being hydrophobic and breathable, being resistant to chemical corrosion, and being moist but not greasy. Therefore, it is widely used in almost all cosmetics such as skin care products, hair care products, baby products, beauty cosmetics, and antiperspirants, deodorants, and sunscreen products for the body, becoming a multifunctional component in cosmetics. On the basis of retaining its original properties, cosmetics containing silicone can greatly enhance its lubrication, breathability, softness, antistatic, film-forming, smoothness, mildew resistance, antifouling, and radiation resistance, so that the cosmetics can be kept on the surface of the skin or where they are applied for a long time. In addition, it can also be used in the manufacture of cosmetics to eliminate the mixed air and unnecessary bubbles, so that the cosmetics themselves are smooth and soft. As a new cosmetic component, silicone will play an immeasurable role in improving the quality of cosmetics, improving the performance of use, and developing new products by utilizing its uniqueness, and can multiply the value of cosmetics.

The main types of silicone used in cosmetics are:
1. Silicone as oil
(1) Polydimethylpolysiloxane: The most widely used silicone as oil is dimethylpolysiloxane (DPMS) with a lower viscosity. The purpose of adding it is to minimize the greasy feeling of the oil, to make it smooth and comfortable, and to help other cosmetic ingredients spread on the skin and hair. It can be used in hand and body lotions, creams, cosmetics, vanishing creams, tanning lotions, air-permeable gel shaving mousse, foundation and hair products.
Polydimethylsiloxane mainly plays the role of lubrication, UV protection, moisturizing and improving skin feel in cosmetics.
Lubricity: Polydimethylsiloxane can enhance the lubricity of skin care products, keep the skin smooth and refreshing, and has good permeability, which can improve the stickiness and prevent the skin care products from turning white after application.
Anti-ultraviolet: Skin care products with polydimethylsiloxane can play an anti-ultraviolet role and protect the skin from UV damage.
Moisturizing effect: Polydimethylsiloxane has good moisturizing properties, which can keep the skin fresh while moisturizing, and will not make the skin feel sticky.
Improve skin feel: Polydimethylsiloxane can smooth the skin feel, improve the stickiness, and prevent the skin from turning white after applying skin care products. It has the functions of filling fine lines, forming matte, and improving appearance.
In addition, polydimethylsiloxane also has good air permeability and obvious dust-proof function. It is used in cosmetics to replace traditional oil raw materials to make the hair surface smoother, bringing soft, strong, easy to comb, and shiny effects. It should be noted that some people may have allergic reactions to polydimethylsiloxane. It is recommended to conduct skin tests or consult a professional doctor before using skin care products containing this ingredient.
(2) Polymethylphenylsiloxane: Easy to prepare, it is a common additive in creams, lotions and sunscreen products. It can be used in hair sprays, shampoos, skin protectants, shaving pre-washes, and hair care products. Vitamins, sunscreens, etc.
(3) Cyclic dimethylsiloxane: It has an appropriate evaporation speed. When evaporating, the skin does not feel cold and leaves no residue. It can be used as a base oil or temporary carrier, such as oily foundation, hair conditioner, and nail polish. , eye beauty products (such as eyebrow dye, eye shadow, eyebrow pencil, etc.), etc., can also be used to remove sweat, deodorant, deodorant, hair spray, hair decoration supplies, hair cream detergent, sunscreen supplies, Fixatives, etc.
(4) Octadecyltrimethylsiloxane: It has the characteristics of wax, has a low melting point, melts quickly under the skin, and can leave a smooth and soft film. It can be used to prepare various solid, semi-solid and liquid cosmetics. As well as lipsticks, lipsticks, skin creams, ointments, hair conditioners, etc.
(5) Modified silicone oil: Polyether modified silicone oil is used in shampoos, which can significantly improve the combability of dry and wet hair, and prevent hair from getting tangled; it is used in skin care lotions to have lubricity and moisturizing properties.
1) Amino-modified silicone oil has excellent adhesion and washing resistance to hair, improves combability, and promotes drying effect. It is an excellent hair care and hairdressing product and is mainly used to prepare various shampoos.
2) Silicones with film-forming capabilities use resinous and rubbery silicones that are easily soluble in cyclic silicones or volatile solvents of hydrocarbons. This solution is applied to the substrate and then dried to form a thin film. Produces a film that is non-sticky, does not transfer even on contact, and is water-resistant and hydrophobic.
3) Silicones used as surfactants such as polyether-modified silicone oil, polyether-alkyl modified silicone oil, cationic quaternary ammonium salt-modified silicone, anionic sulfonate-modified and amphoteric betaine-modified silicone and other surfactants.
4) Silicone betaine surfactants and polyether modified silicone oil, which have the ability to reduce irritation, can reduce the irritation of the components to the skin and eyes when mixed with other cosmetic components.
5) Silicone as a powder treatment agent can be coated with silicone resin on the surface of animal, plant and mineral powders to impart lubricity to the powder; simply mixing hydrogen-containing silicone oil on mineral powders such as titanium can impart hydrophobicity to the powder ; DPMS or hydrogen-containing silicone oil is dissolved in an organic solvent and then contacted with titanium powder, and a zinc catalyst is added to give the powder free flowability; alkyl polysiloxane and ester compounds are used together to coat titanium dioxide, which can improve the quality of the powder Dust resistance and dispersibility: The powder surface is treated with high molecular weight DPMS to give the powder hydrophobicity and durability. It also has less makeup collapse, good makeup surface, good adhesion to the skin, and moderate stickiness.
6) Silicone with cleansing ability. Some countries have developed spherical powder containing silicone polysiloxane elastomer. The absorption capacity is higher than that of past powders. Cleansing cosmetics containing this powder can overcome the previous problems of cleansing makeup. The disadvantages of the material are that it does not irritate the skin when applied, improves lubricity, changes the contact with the skin from point contact to surface contact, has good removal effect of organic pollutants, and improves the cleaning effect.

This chapter is from Baidu Library, and the copyright belongs to the author. It is only for reference and study by people inside and outside the industry. If there is any infringement, please contact us to delete it. For non-commercial reprints, please indicate the source.