Product Name | |
| CAS | 9016‑00‑6 |
Quality Standard | Standard |
Product Grade | Cationic Emulsifiers |
Place of Origin | China |
Dangerous Goods | No |
Dimethyl silicone oil, also known as polydimethylsiloxane (PDMS), is a linear organosilicon polymer composed of repeating dimethylsiloxane units [–Si(CH₃)₂O–] in its molecular structure. It is synthesized through the hydrolysis and polymerization of dimethyldichlorosilane, with adjustable viscosity ranging from low-viscosity mobile liquids to high-viscosity pastes by controlling the polymerization degree.
At room temperature, dimethyl silicone oil is typically a colorless, transparent, odorless, and non-toxic liquid. It is insoluble in water and most polar solvents but miscible with non-polar solvents such as benzene, toluene, and mineral oil. As a classic silicone material, it has a series of excellent properties that make it widely used in industrial, daily chemical, medical, and other fields.
- Excellent thermal stabilityIt has a wide operating temperature range, usually from -50°C to 200°C, and can maintain stable physical and chemical properties in this range. It is not easy to decompose, volatilize, or oxidize at high temperatures, and will not freeze or lose fluidity at low temperatures.
- Good hydrophobicity and moisture resistanceThe methyl groups on the molecular chain have strong hydrophobicity, enabling dimethyl silicone oil to form a water-repellent film on the surface of substrates. This film can effectively prevent water from penetrating, providing excellent moisture-proof and waterproof effects.
- Low surface tension and good lubricityIt has lower surface tension than most organic oils, which gives it good wetting, spreading, and defoaming properties. Meanwhile, its molecular chain has high flexibility, making it an ideal lubricant for precision instruments, plastics, and rubber products, with low friction coefficient and long lubrication life.
- Chemical inertness and biocompatibilityIt is chemically stable and does not react with acids, alkalis, salts, or most organic substances under normal conditions. It also has good biocompatibility, non-irritating to human skin and mucous membranes, and meets the safety standards of medical and cosmetic products.
This is one of the most common application fields of dimethyl silicone oil, where it is valued for its excellent skin and hair conditioning effects.
- Skin care products: Added to moisturizing creams, lotions, foundations, and sunscreens, it forms a thin, breathable protective film on the skin surface, locking in moisture and preventing water loss. It also improves the spreadability of products, making them easy to apply without leaving a sticky feeling, and can fill fine lines on the skin to enhance the smoothness of makeup. Recommended dosage: 1%–10%.
- Hair care products: Used in shampoos, conditioners, and hair serums, it adsorbs onto the hair surface to reduce friction between hair strands, improving combability, eliminating static electricity, and reducing frizz. It leaves hair soft, glossy, and manageable, especially suitable for dry and damaged hair. Recommended dosage: 0.5%–5%.
- Personal care products: Applied in deodorants, antiperspirants, and body lotions, it plays a role in smoothing the skin and enhancing the texture of products.
- Lubricants: Used as a high-temperature lubricant for precision instruments, bearings, gears, and molds. It is especially suitable for lubrication in harsh environments such as high temperature, high humidity, and corrosion, and can also be used as a lubricant for plastic and rubber parts to avoid damage caused by friction.
- Mold release agents: As an efficient mold release agent for plastic, rubber, and die-casting industries, it can form a uniform release film on the mold surface, enabling products to be demolded quickly and easily without affecting the surface finish of products. It is widely used in the production of silicone rubber, polyurethane, and ABS plastic products.
Benefiting from its good biocompatibility and chemical inertness, dimethyl silicone oil has important applications in the medical field.
- Medical devices: Used as a lubricant for catheters, endoscopes, and other medical devices, reducing friction during insertion and minimizing irritation to human tissues. It can also be used as a coating material for medical instruments to improve their corrosion resistance and biocompatibility.
- Pharmaceutical preparations: As an auxiliary material for oral medicines and topical ointments, it acts as a defoamer and dispersant. For example, it is added to anti-foaming drugs for treating flatulence, which can reduce the surface tension of intestinal bubbles and promote their rupture and discharge.
- Textile industry: Used as a softener and water repellent for fabrics. It can make cotton, wool, synthetic fibers, and other fabrics soft, smooth, and wrinkle-resistant, while improving their water repellency and stain resistance.
- Defoaming agents: Used in industrial production processes such as papermaking, wastewater treatment, and fermentation. Its low surface tension enables it to quickly break foam and prevent foam regeneration, improving production efficiency.
- Electronics industry: Used as an insulating oil for transformers, capacitors, and other electronic components, with good electrical insulation performance and thermal conductivity, which can improve the safety and service life of equipment.
Storage ConditionsStore dimethyl silicone oil in a sealed plastic or iron drum, placed in a cool, dry, and well-ventilated warehouse, away from direct sunlight, heat sources, and open flames. It should not be mixed with strong oxidants, acids, or alkalis to avoid chemical reactions. The shelf life is generally 2–3 years when stored properly.
Safety InstructionsDimethyl silicone oil is not classified as a hazardous chemical. It is non-toxic, non-flammable, and non-corrosive. For industrial operations, avoid inhaling a large amount of its vapor or mist; for skin contact, rinse with soap and water if necessary. It is safe for use in cosmetics and medical products within the recommended dosage range. When disposing of waste, it should be handled in accordance with local environmental protection regulations, and direct discharge into water bodies should be avoided.
Product Introduction