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Polyurea Grease Formulation
Polyurea Grease: General Overview, Composition and Formulation
Polyurea grease uses a non-soap organic thickener and is frequently selected for electric motors, high-speed bearings, high-temperature service and long-life applications. Thickener chemistry, reactant selection and production control strongly affect consistency, noise and bearing life.
Development must consider operating speed, temperature, bearing design, oxidation life, grease compatibility and safe chemical handling.
General Composition of Polyurea Grease
- COMPONENT | PURPOSE
Base oil
Mineral or synthetic oil selected for bearing speed, temperature and life.
Polyurea thickener system
Non-soap organic thickener providing structure and thermal characteristics.
Antioxidant
Supports long oxidation life at elevated temperature.
Rust and corrosion inhibitor
Protects bearing surfaces during storage and service.
Antiwear additive
Improves protection where required without disturbing bearing performance.
Friction modifier
Used for selected efficiency, noise or wear requirements.
The thickener may be mono-, di- or tetraurea depending on the required performance.
Production Process and Lubechem Technical Support
- TYPICAL MANUFACTURING SEQUENCE
1. Review reactor design, ventilation and chemical-safety controls.
2. Charge the selected base-oil portion.
3. Add reactants under controlled stoichiometry and temperature.
4. Manage the reaction exotherm and residence time.
5. Complete thickener formation and add finishing oil.
6. Cool under controlled agitation.
7. Add compatible performance additives.
8. Homogenise, deaerate and complete bearing-related testing.
LUBECHEM SUPPORT
• Thickener-chemistry and base-oil selection
• Safe process and equipment review
• Formula, SOP and batch documentation
• Laboratory and bearing-performance validation
• Pilot and commercial scale-up
• Compatibility and changeover studies
• Production troubleshooting
Typical Specifications, Testing and Applications
- TYPICAL DEVELOPMENT TARGETS
NLGI grade: commonly 1–3
Worked penetration: ASTM D217
Dropping point: frequently above 240°C, chemistry-dependent
Oxidation stability: ASTM D942
High-temperature bearing life: ASTM D3336 when required
Low-temperature torque: ASTM D1478 where applicable
Noise performance: bearing-specific test
Rust prevention: ASTM D1743
Oil separation and mechanical stability: application-specific limits
COMMON APPLICATIONS
• Electric-motor and generator bearings
• High-speed bearings
• Steel and paper equipment
• Automotive components
• Sealed or fill-for-life systems
Final suitability requires bearing and compatibility validation.
Polyurea Grease: Frequently Asked Questions
- Is polyurea compatible with lithium grease?
Compatibility varies and should be tested before changeover.
Is it suitable for electric motors?
Many polyurea greases are developed for motors, but speed, temperature and noise requirements must be specified.
Can it be made in an ordinary grease kettle?
Suitability depends on reactant handling, safety controls, agitation and ventilation.
Does high dropping point guarantee long bearing life?
No. Base-oil oxidation, thickener chemistry and operating conditions also control life.
Does Lubechem provide scale-up support?
Yes, after reviewing the chemicals, plant equipment and operating controls.
Get in Touch with Us
If you found this information useful and would like to discuss further, please contact us. We are committed to providing high-quality solutions tailored to your specific needs.
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