Dimethicone, also known as polydimethylsiloxane, is a hydrophobic silicone material with a colorless or light yellow liquid appearance. It has high transparency, light transmittance of 100%, heat resistance, cold resistance, small change in viscosity with temperature, water resistance, small surface tension, thermal conductivity, thermal conductivity of 0.134-0.159W/M* K is physiologically inert and has good chemical stability. It has good electrical insulation, weather resistance, hydrophobicity, and high shear resistance, and can be used for a long time at -50°C to 200°C. Today, let's walk into Qiangqiang Chemical together to understand the application of simethicone in different fields!
①Application of simethicone oil in skin care cosmetics
Simethicone has been widely used in cosmetics, skin care products, care products, and hair care products.
1. Non-toxic, odorless, tasteless, does not affect the appearance and aroma of the final product, and will not cause irritation and allergies to the skin;
2. It has a very good sense of lightness and extensibility, and the use of medium-viscosity methyl silicone oil in various skin care products can improve the extensibility of cosmetics on the skin and protect the skin;
3. With good hydrophobicity and smoothness, hair care products formulated with silicone oil, such as hair oil, hair cream, mousse, etc., can make hair at any temperature combed into the desired hairstyle, and can effectively prevent external moisture from soaking or moisture evaporative imbalance;
4. The performance of anti-ultraviolet radiation is good. It will not oxidize and deteriorate under ultraviolet light to cause skin irritation, and will not be lost due to sea bathing or sweating, which can effectively prevent the harm of ultraviolet rays.
5. No irritation to the skin, high safety to the human body, and has certain curative effect on some skin diseases, such as dyshidrosis type eczema neurodermatitis and occupational dermatitis;
6. It has good gas permeability and anti-static elimination. After rubbing the skin containing polysiloxane skin cream, all static electricity is eliminated, and it has obvious dust-proof effect. Good air permeability, even if a siloxane film is formed on the skin It also does not affect sweat discharge and hinders skin respiration;
7. Chemical stability, no reaction with other cosmetic raw materials, the foundation cream added with silicone oil can protect the skin from the damage of pigments and solvents.
②Application of simethicone oil in automobile industry
Simethicone is widely used in the interior/exterior of automobiles due to its viscosity-temperature properties, wide viscosity range, thermal stability, and high compressibility. Typical examples of use include:
1. Brake fluid, an automobile brake fluid based on relatively low-viscosity methyl silicone oil (20mPa·s).
2. Damping oil, the damping oil used for cooling fans of automobile engines has been put into practical use, which can improve the performance of components, reduce resistance and wear, and prolong the life of the system.
3. Tackifier, which can be used as glass fiber reinforced material and tackifier, can improve the bonding between glass fiber and resin, thereby significantly improving the mechanical properties of reinforced plastics. It is used in the production and maintenance of adhesive sealing materials for automobile windshield glass, door and window frames, rearview mirrors, exhaust pipes and equipment susceptible to water splashing.
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