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Ethyl Silicone Oil, also known as Ethyl Siloxane Fluid, is a high-performance organosilicon material designed for applications requiring excellent low-temperature performance, lubrication, electrical insulation and release properties.
With a freezing point below -80°C, high flash point and good temperature stability, ethyl silicone oil can be used in a wide range of industrial applications, including specialty lubricants, release agents, electrical insulation fluids, damping systems and functional additives.
Ethyl silicone oil is a type of silicone-based functional fluid with excellent lubrication, temperature stability and dielectric properties.
It is typically supplied as a colorless to pale yellow transparent liquid and offers good chemical stability, low-temperature fluidity and low surface tension.
| Item | Specification |
|---|---|
| Product Name | Ethyl Silicone Oil |
| English Name | Ethyl Siloxane Fluid / Ethyl Silicone Oil |
| CAS No. | 63148-61-8 |
| Appearance | Colorless to pale yellow transparent liquid |
| Freezing Point | ＜-80°C |
| Relative Density | 0.95–1.05 |
| Flash Point | ＞265°C, open cup |
| pH | 5–7 |
| Solubility | Soluble in toluene, ether, chloroform and other organic solvents |
Ethyl silicone oil can also be blended with petroleum-based products according to specific formulation requirements.
Low-temperature performance is one of the major advantages of ethyl silicone oil.
Many conventional lubricating fluids can experience significant increases in viscosity as the temperature decreases. This can lead to higher starting torque, poor fluid circulation and reduced lubrication efficiency.
Ethyl silicone oil has a freezing point below -80°C, allowing it to maintain good fluidity under extremely cold conditions.
However, it is important to understand that freezing point alone does not determine the actual minimum operating temperature.
For a low-temperature lubrication system, engineers should also consider:
Viscosity at the actual operating temperature;
Starting torque;
Flowability;
Load conditions;
Friction pair materials;
Seal compatibility;
Lubricating film formation;
Equipment operating speed.
Therefore, actual application testing is recommended when ethyl silicone oil is used in extremely low-temperature systems.
Ethyl silicone oil has low surface tension and can spread relatively easily over many material surfaces.
It can form a uniform lubricating film that helps:
Reduce friction;
Reduce mechanical wear;
Improve component movement;
Reduce operating resistance;
Improve long-term equipment stability.
For this reason, ethyl silicone oil can be considered for precision instruments, mechanical components and specialty lubrication systems.
Ethyl silicone oil has a freezing point below -80°C, making it particularly attractive for applications exposed to extreme cold.
Potential applications include:
Low-temperature mechanical lubrication;
Precision instruments;
Damping systems;
Specialty hydraulic systems;
Aerospace-related equipment;
Cold-environment machinery;
Special-purpose lubricating systems.
For applications operating below approximately -60°C, product selection should be based on actual viscosity-temperature behavior rather than freezing point alone.
In addition to lubrication, ethyl silicone oil provides good dielectric performance.
This makes it suitable for certain electrical and electronic applications where both fluidity and insulation properties are required.
Potential applications include:
Electrical insulating fluids;
Dielectric fluids;
Electrical equipment;
Special electronic materials;
Insulating systems.
For electrical applications, dielectric strength, volume resistivity, moisture content, thermal stability and material compatibility should be evaluated according to the specific equipment requirements.
Ethyl silicone oil has a high flash point and can maintain relatively stable performance over a broad temperature range.
The typical application temperature range can reach approximately -80 to 150°C, depending on the specific grade and operating conditions.
Actual continuous service temperature should be determined according to factors such as:
Operating temperature;
Heating duration;
Oxygen exposure;
Equipment sealing;
Oil purity;
Mechanical load.
Ethyl silicone oil has relatively low volatility compared with many low-molecular-weight organic fluids.
In properly designed closed or semi-closed systems, lower volatility can help reduce fluid loss and contribute to longer service life.
This characteristic is particularly valuable for specialty lubrication and long-term equipment operation.
Ethyl silicone oil can be used as a specialty lubricant for applications requiring low-temperature fluidity, low friction and good temperature stability.
Potential applications include:
Precision instruments;
Mechanical components;
Low-temperature equipment;
Specialty lubrication systems;
Moving parts;
Friction-reduction systems.
Its application should be selected according to viscosity, load, speed and operating temperature.
Because of its low surface tension and lubricating properties, ethyl silicone oil can form a relatively uniform film on mold surfaces.
It can therefore be considered for:
Rubber molding;
Plastic molding;
Injection molding;
Compression molding;
Specialty industrial release applications.
The appropriate application concentration depends on the material, mold design, molding temperature and production process.
Ethyl silicone oil can be used in selected electrical applications because of its dielectric properties.
Typical considerations include:
Electrical insulation;
Dielectric fluids;
Electrical equipment;
Specialty insulating systems.
Before commercial use, compatibility with insulation materials, seals and other components should be evaluated.
Silicone-based fluids can provide stable performance over a relatively broad temperature range and can be used as base fluids in certain damping systems.
By selecting an appropriate viscosity grade, the damping characteristics of a system can be adjusted.
Potential applications include:
Precision instruments;
Shock-absorbing systems;
Damping mechanisms;
Specialty mechanical equipment.
Ethyl silicone oil can also be considered as a processing aid or functional additive in rubber and plastic formulations.
Depending on the formulation, it may help improve:
Processing lubrication;
Mold release;
Surface properties;
Material handling.
Compatibility testing is recommended before large-scale production.
The main advantage of ethyl silicone oil is not necessarily one isolated property, but the combination of low-temperature performance, lubrication, dielectric properties and temperature stability.
| Property | Ethyl Silicone Oil | Conventional Mineral Oil |
|---|---|---|
| Low-temperature fluidity | Excellent | Depends on base oil and additives |
| Freezing point | ＜-80°C | Generally higher |
| Lubrication | Excellent | Good |
| Dielectric properties | Good | Depends on oil type |
| Temperature stability | Good | Depends on formulation |
| Volatility | Relatively low | Depends on product |
| Chemical stability | Good | Depends on product |
| Release performance | Excellent in suitable applications | Generally limited |
Therefore, ethyl silicone oil can be particularly useful where conventional lubricants cannot simultaneously meet low-temperature, lubrication and electrical insulation requirements.
Choosing a silicone oil should not be based only on viscosity or freezing point.
For specialty applications, the following information should be considered.
What are the minimum and maximum temperatures during operation?
What viscosity is required for lubrication, flow or damping?
Is the system operating under light load, high speed, low speed or high load conditions?
Are the contacting materials metal, plastic, rubber or composite materials?
Compatibility with seals, gaskets, adhesives and polymeric materials should be evaluated.
For electrical applications, dielectric strength, volume resistivity and other electrical parameters should be confirmed.
Will the silicone oil be used as a pure fluid, a release agent or an additive in a formulation?
When used as a formulation additive, excessive addition does not necessarily improve performance.
An excessive amount may increase formulation cost and could affect surface properties, adhesion or other formulation characteristics.
When ethyl silicone oil is used as an additive, sufficient mixing should be provided to ensure uniform distribution throughout the system.
For high-viscosity formulations, the addition sequence and mixing conditions may need to be optimized.
If ethyl silicone oil is blended with mineral oil, synthetic oil, rubber, plastic or other chemical materials, compatibility testing should be performed in advance.
For demanding applications, particularly those involving temperatures below -60°C, electrical insulation or long-term mechanical lubrication, actual application testing is strongly recommended.
The freezing point can be below -80°C, while the general application temperature range can reach approximately -80 to 150°C.
However, the actual minimum service temperature depends on viscosity, equipment design and operating conditions.
Yes. Its lubrication properties make it suitable for selected precision instruments, mechanical components and specialty lubrication systems.
Yes. Its low surface tension and lubricating properties make it suitable for selected rubber and plastic molding applications.
Yes, it can be considered for selected electrical insulation and dielectric applications. The final product selection should be based on the required electrical properties and compatibility with the electrical system.
Not necessarily.
Different silicone oils can have different molecular structures, viscosities, temperature characteristics and material compatibility.
Before replacement, the application temperature, viscosity requirements, lubrication performance, electrical properties and compatibility should be evaluated.
As precision machinery, electrical equipment, advanced manufacturing and specialty industrial systems continue to develop, the demand for high-performance functional fluids is increasing.
Future silicone fluid development will increasingly focus on:
Wider operating temperature ranges;
Better viscosity-temperature stability;
Lower volatility;
Improved lubrication and friction resistance;
Enhanced electrical insulation;
Better compatibility with other materials;
Longer service life.
With its combination of super low-temperature resistance, lubrication performance, release properties and dielectric performance, ethyl silicone oil can provide a versatile solution for demanding industrial applications.
Ethyl silicone oil is more than a conventional lubricant. It is a multifunctional silicone fluid combining low-temperature performance, lubrication, release and electrical insulation properties.
For equipment operating under demanding temperature, friction or electrical conditions, selecting the appropriate viscosity grade and product specification is essential for achieving reliable performance.
IOTA can provide ethyl silicone oil solutions based on the customer's application, operating temperature, viscosity requirements, lubrication conditions, electrical requirements and material compatibility, helping customers select the appropriate silicone fluid for their specific application.
