Synthetic Ester Lubricant Base Oil
Polyester is a new type of synthetic ester lubricating base oil, which has the dual properties of synthetic ester and PAO and high lubricity. Combined with anti-wear and extreme pressure agents, it has remarkable load capacity and extreme pressure performance. The ester group molecule has a certain polarity, so it has a good affinity for metals. With PAO or mineral oil, it has a unique property, that is, low thickening effect, with good resistance to high temperature and high shear performance, so it is widely used in internal combustion engine oil and gear oil.
BASOILS High-Viscosity Complex Ester Base Oil is a synthetic ester base oil series developed for lubricant formulators requiring high viscosity, strong oil-film retention, ester polarity, and reliable performance under heavy-load operating conditions.
Complex ester base oils combine the lubricity and metal affinity of ester chemistry with a broad viscosity range, making them suitable for industrial gear oils, high-performance greases, compressor lubricants, hydraulic oil blends, and selected engine oil formulations. Available from medium-viscosity to ultra-high-viscosity grades, this series helps formulators build lubricant systems for demanding industrial applications.
The series includes multiple viscosity grades for different finished-lubricant targets. Lower-viscosity grades can support industrial oil blends, while high- and ultra-high-viscosity grades are suitable for heavy-duty gear oils, greases, and specialized industrial lubrication systems.
The polar ester structure improves the ability of the lubricant to adhere to metal surfaces. This helps support lubricity and oil-film retention in components exposed to heavy loads, repeated movement, or challenging operating environments.
Complex ester base oil can be used in industrial gear oil formulations that require high viscosity, enhanced lubricity, and compatibility with anti-wear and extreme-pressure additive packages.
The product series is designed for lubricant systems where thermal stability, viscosity retention, and resistance to mechanical shear are important formulation targets.
This complex ester base oil can be formula
ted with suitable anti-wear, extreme-pressure, antioxidant, and friction-control additives. Final compatibility and performance should be verified through laboratory and field testing.
The product can be evaluated for blending with PAO or selected mineral base oils. The final blend ratio should be determined according to viscosity targets, additive solubility, seal compatibility, oxidation requirements, and application conditions.
| Application | Recommended Maximum Treat Rate | Typical Formulation Role |
|---|---|---|
| Industrial Gear Oil | Up to 98% | High-viscosity gear oils, heavy-duty gear lubricants, EP gear oil formulations |
| Grease | Up to 50% | Industrial greases, bearing greases, high-load and high-viscosity grease systems |
| Hydraulic Oil | Up to 50% | Hydraulic fluid blends requiring improved lubricity and viscosity support |
| Compressor Oil | Up to 30% | Compressor lubricant formulations for demanding industrial operating conditions |
| Internal Combustion Engine Oil | Up to 30% | Selected engine oil formulations requiring enhanced lubricity and oil-film adhesion |
Recommended treat rates are for formulation reference. Final dosage should be confirmed through performance testing, additive compatibility evaluation, and finished-lubricant validation.
| Grade Group | Available Grades | Recommended Formulation Direction |
|---|---|---|
| Medium Viscosity Grades | J115, J135, J460, J680 | Industrial oil blends, medium-viscosity gear oils, hydraulic oils, lubricant modifiers |
| High Viscosity Grades | J1500, J4600 | Heavy-duty gear oils, high-viscosity industrial lubricants, grease formulations |
| Ultra-High Viscosity Grades | J17000, J18000, J20000, J25000, J30000, J50000 | Heavy-load gear oils, high-viscosity greases, specialized industrial lubrication systems |
Tell us your target application, finished-oil viscosity, operating temperature, and base oil system. BASOILS can help you identify a suitable complex ester base oil grade for industrial gear oils, greases, hydraulic fluids, compressor lubricants, and other high-viscosity lubricant formulations.
Complex ester base oil is a synthetic ester lubricant base oil used in formulations requiring high viscosity, ester polarity, lubricity, and strong oil-film retention. It is commonly considered for industrial gear oils, greases, hydraulic lubricant blends, and other high-performance industrial lubricants.
No. Complex ester base oil and PAO are different synthetic base oil types. Complex esters provide polarity and metal-surface affinity, while PAO is generally valued for its low-temperature behavior and hydrolytic stability. Both can be evaluated in the same lubricant formulation after compatibility testing.
The suitable grade depends on the target finished-oil viscosity, operating temperature, load conditions, and additive package. J460 to J4600 may be evaluated for standard high-viscosity industrial oils, while J17000 to J50000 may be considered for heavy-duty or specialized high-viscosity systems.
Yes. The recommended maximum reference dosage for grease applications is up to 50%. The final selection should be tested with the chosen thickener system, such as lithium, lithium complex, polyurea, calcium sulfonate, or other grease technologies.
It can be evaluated for blending with PAO or selected mineral base oils. Before commercial use, formulators should confirm miscibility, appearance, viscosity response, additive solubility, seal compatibility, and finished-lubricant performance.
Complex ester base oil can support lubricity, metal affinity, and oil-film retention. For high-load applications, it should be formulated with suitable EP and anti-wear additives to achieve the required performance level.
| Product name | Kinematic viscosity (40℃ Cmm²/s) | Kinematic viscosity (100℃ Cmm²/s) | Viscosity index (VI) | Pour point ℃ | Flash point ℃ | Acid value MgKOH/g | Evaporation loss (%) | Density g/cm³ |
| J115 | 115 | 16.5 | 155 | -49 | 259 | 0.05 | 1 | 0.93 |
| J135 | 350 | 36.7 | 152 | -39 | 273 | 0.05 | 1.5 | 0.93 |
| J460 | 510 | 50 | 158 | -35 | 280 | 0.05 | 1.5 | 0.93 |
| J680 | 670 | 58 | 150 | -29 | 280 | 0.05 | 1.7 | 0.93 |
| J1500 | 1450 | 115 | 175 | -26 | 250 | 0.05 | 2 | 0.93 |
| J4600 | 5100 | 285 | 190 | -14 | 250 | 0.05 | 2 | 0.93 |
| J17000 | 17000 | 1215 | 300 | -15 | 257 | 0.18 | 2 | 0.93 |
| J18000 | 18000 | 600 | 185 | -2 | 240 | 0.05 | 1.6 | 0.92 |
| J20000 | 20000 | 1415 | 308 | -13 | 257 | 0.18 | 2 | 0.93 |
| J25000 | 25000 | 1665 | 308 | -10 | 250 | 0.18 | 2 | 0.93 |
| J30000 | 33342 | 2269 | 333 | 251 | 0.2 | 2 | 0.93 | |
| J50000 | 52200 | 3621 | 363 | 256 | 0.24 | 2 | 0.93 |
Internal combustion engine oil 30% (Max.)
Gear oil 98% (Max.)
Hydraulic oil 50% (Max.)
Compressor oil 30% (Max.)
Grease 50% (Max.)
Broad viscosity range from medium to ultra-high viscosity
Strong ester polarity for improved metal-surface affinity
Helps improve lubricant adhesion and oil-film retention
Suitable for high-load and extreme-pressure lubricant systems
Supports anti-wear and EP additive package formulation
Good high-temperature and high-shear performance
High thermal oxidation stability
Can help extend finished-lubricant service-life targets
Suitable for blending with PAO or mineral base oils after testing
Can be evaluated as a lubricity-enhancing base-oil component in industrial lubricant formulations
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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