Synthetic Ester Lubricant Base Oil
This series of products is a high quality, low viscosity, low pour point dibasic acid ester, alone or in combination with other synthetic materials, used as a base oil for a variety of fully synthetic or partially synthetic lubricating oils.It can be used in many automotive and industrial lubrication applications, as well as ultra-low temperature synthetic lubricants.
BASOILS Diester Base Oil is a synthetic ester base oil series developed for fully synthetic and semi-synthetic lubricant formulations requiring low viscosity, excellent low-temperature fluidity, high viscosity index, and reliable lubricity.
Available in grades from DA21 to DA51, the series provides formulators with flexible options for low-viscosity industrial oils, ultra-low-temperature lubricants, aviation lubricant blends, refrigeration oils, air compressor oils, hydraulic fluids, greases, gear oils, and internal combustion engine oils.
Diester base oils can be used as a primary base oil or as a co-base oil with compatible PAO and selected mineral base oils. Final blend ratios should be determined according to the target viscosity, additive package, operating temperature, volatility requirements, and finished-lubricant performance targets.
| Product name | Kinematic viscosity 40℃ (mm²/s) | Kinematic viscosity 100℃ (mm²/s) | Viscosity index (VI) | Pour point (℃) | Flash point (℃) | Acid value (mgKOH/g) |
| DA21 | 4.0 | 1.4 | - | -60 | 140 | 0.05 |
| DA22 | 7.8 | 2.4 | 137 | -70 | 205 | 0.05 |
| DA31 | 11.1 | 3.1 | 150 | -70 | 220 | 0.05 |
| DA32 | 9.5 | 2.8 | 149 | -65 | 207 | 0.05 |
| DA34 | 12 | 3.2 | 137 | -60 | 199 | 0.05 |
| DA41 | 14 | 3.6 | 144 | -70 | 231 | 0.05 |
| DA51 | 27 | 5.4 | 142 | -57 | 247 | 0.05 |
| Application | Recommended Maximum Treat Rate | Typical Formulation Direction |
|---|---|---|
| Aviation Lubricating Oil | Up to 98% | Synthetic aviation lubricant formulations requiring low-temperature fluidity |
| Air Compressor Oil | Up to 98% | Low-viscosity compressor lubricant blends |
| Refrigeration Oil | Up to 98% | Refrigeration lubricant formulations requiring low-temperature flow |
| High- and Low-Temperature Grease | 10–90% | Grease systems requiring low-temperature mobility and lubricity |
| Hydraulic Oil | 50–90% | Hydraulic fluid formulations requiring low-temperature performance |
| Aerosol Lubricant | 5–15% | Spray lubricants and specialty aerosol lubricant formulations |
| Industrial Gear Oil | Up to 98% | Low- and medium-viscosity gear oil blends |
| Internal Combustion Engine Oil | Up to 98% | Synthetic and semi-synthetic engine oil formulations |
Recommended use levels are for formulation reference only. Final dosage should be determined through compatibility testing, finished-lubricant testing, and application validation.
| Grade | Typical Formulation Direction |
|---|---|
| DA21 | Ultra-low-viscosity lubricant blends, aerosol lubricants, and specialty low-temperature applications |
| DA22 | Low-viscosity synthetic lubricant formulations requiring very low pour point |
| DA31 | Low-temperature engine oil, hydraulic oil, aviation lubricant, and compressor oil formulations |
| DA32 | Low-viscosity industrial lubricant formulations requiring balanced low-temperature performance |
| DA34 | Synthetic lubricant blends requiring low viscosity and controlled volatility |
| DA41 | Low-temperature hydraulic fluids, compressor oils, engine oils, and specialty industrial lubricants |
| DA51 | Medium-low-viscosity industrial oils, gear oil blends, hydraulic oils, and grease formulations |
This guide is for initial selection only. Final grade selection should be based on the finished-oil viscosity target, equipment type, operating temperature, additive compatibility, and application requirements.
Diester base oil is a synthetic ester lubricant base oil produced from dibasic acids and alcohols. It is commonly used in lubricant formulations requiring low viscosity, low-temperature fluidity, ester polarity, and good additive solubility.
Yes. The DA series includes grades with pour points as low as -70°C, making them suitable for evaluating lubricant formulations designed for cold operating environments.
Yes. The current product information lists refrigeration oil as an application direction, with a recommended maximum treat rate of up to 98%. Final refrigerant compatibility and miscibility must be tested for the selected finished lubricant.
Yes. Diester base oil can be evaluated in blends with compatible PAO and selected mineral base oils. Before commercial use, formulators should verify miscibility, viscosity response, additive solubility, seal compatibility, and long-term storage stability.
DA31, DA32, DA41, and DA51 can be evaluated as starting options depending on the target viscosity, required pour point, hydraulic pump design, additive package, and operating environment.
Yes. The recommended formulation range for high- and low-temperature grease is 10–90%. The final formula should be validated with the selected thickener system and additive package.
Share your target application, required viscosity grade, operating temperature, base-oil blend design, annual demand, and destination market.
Aviation lubricating oil 98%(Max.)
Air compressor oi l98%(Max.)
Refrigeration oi l98%(Max)
High and low temperature grease 10~90%
Hydraulic oil 50~90%
Aerosol lubricant 5~15%
Industrial gear oil 98%(Max.)
Internal combustion engine oi l98%(Max)
High thermal oxidation stability
High viscosity index
Excellent low temperature performance
High flash point, low volatility
High resistance to emulsification
Good hydrolysis stability
Biodegradable
DA32 Esterex A32
DA34 Esterex A34
DA41 Esterex A41 HATCOL2910
DA51 Esterex A51 HATCOL 2901
Plastic drum packing, net weight 200kg per barrel.
Store and transport as non-dangerous goods in a cool, dry and ventilated place.
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