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Silicone oil has extremely high commercial value due to its unique chemical and physical properties and is widely used in industrial and commercial fields. The main members of silicone oil are polydimethylsiloxane (PDMS) and other siloxane polymers with organic groups replacing some of the methyl groups. These substituents are mainly phenyl, vinyl, amino, and epoxide. These polymers provide high heat resistance, thermal oxidation resistance, non-corrosiveness, and lubricity. Sometimes, to meet specific application requirements, reactive organic groups to the siloxane polymer obtain modified silicone oils with specific properties or reactivity.
Silicone oil's application in electrical insulating oil
Silicone oil is widely used in the power-insulating oil field due to its excellent electrical insulation performance, thermal stability, chemical inertness, and flame-retardant properties. Compared with traditional mineral oil insulating oil, dimethyl silicone oil exhibits higher flame retardancy and is harmless to human health and the environment. In particular, silicone electrical insulating oil has excellent durability, making it widely used in automotive transformer oil.
Used in power transformers
Dimethyl silicone oil with a viscosity of 50cSt (50mm2/s) is usually used as electrical insulating oil in power transformers because of its high ignition point and flame retardancy. Its viscosity remains unchanged or changes little at 25°C, which ensures the best cooling effect and compatibility with insulating materials.
Used in power capacitors
Low viscosity methylphenyl silicone oil with low phenyl content can withstand a wide operating temperature range. Compared with traditional capacitors of the same type, the use of this silicone oil can significantly increase the capacitance of the capacitor by 4-5 times while ensuring operation security. Therefore, methylphenyl silicone oil is an ideal impregnating oil for power capacitors.
Silicone oil is widely used as a shock-absorbing and damping medium in the machinery manufacturing and instrumentation industries due to its many properties, such as unique viscosity-temperature characteristics, a wide viscosity range, excellent thermal stability, and high compressibility.
Diesel engines
High viscosity dimethyl silicone oil is usually used in diesel engine torsional vibration absorber dampers to enhance the durability and stability of the engine. Its viscosity is usually tens to hundreds of thousands of mm2/s at 25°C.
Automobile engine
In the application of automobile engine cooling fans, dimethyl silicone oil is used as damping oil to improve the efficiency and reliability of the cooling system.
Clutch fluid for four-wheel drive vehicles
As clutch oil for four-wheel drive vehicles, low-viscosity dimethyl silicone oil can optimize the switching operation of the drive mechanism, especially when making sharp turns or driving on harsh roads in mud or snow, improving the vehicle's operability and performance.
Anti-vibration oil for automobile and aircraft instruments
In automobile and aircraft instruments, dimethyl silicone oil with appropriate viscosity is selected as anti-shock oil according to different vibration force requirements to ensure accurate signal output and stable pointer readings.
Damping oil for sensors and instruments
In the application of inductive magnetic sensors, dimethyl silicone oil is used as a damping oil to ensure the stability and accuracy of sensor signals. In addition, dimethyl silicone oil is usually used as a damping or filling oil in pneumatic unit combination instruments and similar instruments to ensure the stability and reliability of instrument parameters.
Silicone oils (dimethyl silicone oil and methylphenyl silicone oil) provide a wide range of viscosities, from 50 cs to 500,000 cs, and their viscosity can remain constant over a wide temperature range. Therefore, these inert silicone oils can be used in hydraulic transmission systems and liquid connectors. Silicone oils with appropriate additives show better heat resistance, oxidation resistance, and a wider temperature-viscosity characteristic. They will not degrade even under extremely high-temperature conditions and always maintain viscosity and torque stability, thus meeting the needs of hydraulic transmission systems under harsh working conditions.
Silicone oil can be used as diffusion pump oil, thanks to its excellent resistance to thermal oxidation, chemical stability, and corrosion resistance. Compared with traditional petroleum or fatty acid ester diffusion pump oil, silicone oil has higher durability and can achieve an ultra-high vacuum of 10-9 to 10-8Pa. Without cutting off the heating state, the stable operation of the diffusion pump can be guaranteed even if it is used for a long time.
Silicone oils have excellent thermal oxidation resistance, low vapor pressure, and high flash point, making them ideal for high-temperature applications. Therefore, they can be used as high-temperature baths and high-temperature heat carriers. To expand the use of silicone oils in industrial applications, specific heat resistance additives can be added to dimethyl silicone oil and methylbenzene silicone oil to increase the applicable temperature range of silicone oils. These modified oils can be used as heat carriers in rubber continuous vulcanization equipment, plastic extruders, and petrochemical equipment.
Silicone oil is a versatile lubricant used for demoulding, anti-sticking, and smoothing in industries such as rubber, plastics, metal casting, glass, paper, and fiber production. It can be used alone. In order to meet the needs of different industries, it can also be formulated into solutions, emulsions, aerosols, or greases.
Silicone oil's application in textile industry
Low viscosity dimethicone oils or formulated solutions can be used as lubricants in textile production due to their excellent temperature resistance and non-discoloration properties. In the fiber production process, the use of these lubricants helps prevent broken yarns and loose yarns.
Silicone oil's application in metal casting
Silicone oils provide excellent mold release and anti-stick properties and are often used as release agents in metal casting. In the melt spinning process, dimethyl silicone oil can be used for nozzle release to avoid filament breakage.
In the refrigeration field, modified silicone oil is widely used as a refrigerant because of its high boiling point, non-corrosiveness, harmlessness to humans, equipment, and the environment, and excellent low-temperature fluidity.
These applications include wear inhibitors that reduce friction and wear in refrigeration circulation systems, automotive refrigerants that provide antifreeze protection in low-temperature environments, transformer oils with excellent insulation and cooling properties, and refrigeration oils that improve equipment efficiency and life.
Silicone oil's application in polishing agent
As a multifunctional additive, silicone oil is an irreplaceable and important material in the formulation of polishing agents and surface treatment agents.
Silicone oil's application in glass and ceramic surface treatment
Solutions prepared with silicone oil are usually adhered to glass and ceramic surfaces by dipping or spraying and treated at high temperatures to form a thin film with hydrophobic and lubricating properties.
Silicone oil's application in pharmaceutical packaging
Bottles treated with silicone oil can prevent drugs from adhering to the bottle's inside or reduce scratches and wear on the bottle's outside during transportation.
Silicone oil's application in surface treatment of insulators
Glass and ceramic insulators after heat treatment with silicone oil can significantly improve electrical insulation, weather resistance, and natural cleaning ability.
Application of coatings and inks
Silicone oil can be used as a multifunctional additive for coatings and inks. Using a small amount of dimethyl silicone oil can improve the coating properties and the brightness and gloss of the coating. High-viscosity dimethyl silicone oil can also be used as a defoamer to enhance the stability of the coating.
Silicone oil's application in plastics industry and specific plastic resins
In the plastic production process, dimethyl silicone oil can be used as a release agent to improve the plastic's demoulding properties and improve the dispersion and fluidity of inorganic fillers in the resin.
In the production process of ABS, POMS, and HIPS, the release agent can improve the lubricity and wear resistance of the product surface and is suitable for manufacturing wear-resistant and lubricated plastic parts.
Powders treated with silicone oil are widely used in cosmetics, pharmaceuticals, coatings, inks, and fillers for rubber materials.
Silicone oil is hydrophobic, and precipitated silica can be treated with silicone oil to improve its electrical properties, making it suitable for use as a reinforcing filler for silicone rubber.
The powder treated with methyl hydrogen silicone oil is hydrophobic, making it easier to spread on the skin and improving the spreadability and durability of cosmetics.
The application forms of silicone oil in cosmetics include direct use (silicone oil, raw dimethylsiloxane, cyclosiloxane) and dosage forms (emulsion, dispersion, solution and compound silicone oil).
Skin Care Products
Low and medium viscosity silicone oils can improve the spreadability of the skin, thereby protecting sensitive skin.
Makeup products
In cosmetics, adding silicone oil can improve pigment dispersion, spreadability, and feel of use.
Shampoo, Potion and Mousse
Silicone oil has the function of stabilizing foam. Adding silicone oil to shampoo and mousse can improve the combing effect of hair.
Shaving Cream
Shaving cream with silicone oil increases lubrication and can reduce friction between the skin and the blade.
Low-viscosity silicone oils are usually volatile and are used in skin cosmetics, antiperspirants, and body shampoos as a volatile carrier.
In cosmetic applications, silicone oil emulsion improves skin affinity, enhances moisturizing effects, and provides a good feel and stability.
The types of silicone oil emulsions include oil-in-water (O/W) and water-in-oil (W/O).
Oil-in-water (O/W) is mostly used in various cosmetics.
Water-in-oil (W/O) has a better affinity with the skin and is mainly used in skin care cosmetics and pharmaceutical products.
Compound silicone oil is also called silicone oil dispersion, and its safety standard is higher than that of industrial-grade silicone oil. The use of silicone oil in hair care cosmetics can increase the combability of hair.
In the textile industry, silicone oil is often used as a lubricant to enhance the performance of sewing threads. This silicone oil can improve sewing efficiency and enhance the tear resistance of sewing threads, preventing thread breakage and skipping, thereby improving the overall strength and toughness of the thread. In addition, the use of antistatic silicone oil can also improve the smoothness, softness, and glossiness of sewing threads during high-speed sewing.
Sewing thread lubricants include silicone dimethyl silicone oil, silicone wax dispersion, and oil/white oil mixture.
Silicone oil/white oil mixture usually provides basic lubrication for traditional sewing threads.
350cs, 500cs, and 1000cs dimethyl silicone oils are suitable for general-speed sewing machine applications due to their wide applicability and good performance.
Silicone wax dispersion has excellent lubrication properties and is specially designed for high-speed sewing machines or occasions with specific temperature resistance requirements.
Yongrui provides high-quality silicone products, including basic silicone oil and modified silicone oil with different viscosities of 1-2000000, to meet the specific applications in various industries.
