Overview
Polyurea thickener is a synthetic organic compound widely used to enhance the consistency and performance of lubricating greases. Unlike traditional lithium or calcium soap thickeners, polyurea offers superior thermal and mechanical stability, making it ideal for high-stress applications. Developed as an alternative to metal soap thickeners, polyurea eliminates the risk of metallic ash formation, which can damage machinery. Its polymer structure allows for customizable viscosity control, catering to industries requiring precision lubrication.
Physical and Chemical Properties
Polyurea thickeners are characterized by their white to yellowish granular form and insolubility in water. They exhibit excellent dispersibility in mineral or synthetic oils, forming stable colloidal structures. Key chemical properties include high decomposition temperatures (above 200°C) and resistance to oxidation. These thickeners maintain rheological stability under shear stress, ensuring consistent lubricant performance in dynamic environments like bearings or gears.
Main Applications
Primary use cases include high-temperature greases for industrial machinery, electric motor bearings, and automotive components such as wheel hubs. Polyurea-thickened greases are favored in food-grade applications due to their non-toxicity. In the aerospace sector, these thickeners enable lightweight lubricants with extended service intervals. Their oxidation resistance also benefits wind turbine gearboxes, where maintenance access is limited.
Safety and Storage
While polyurea thickeners are generally non-hazardous, dust inhalation should be avoided. Store in sealed containers at temperatures below 30°C to prevent clumping or moisture absorption. Disposal should follow local regulations for synthetic polymers. Spills require containment with inert absorbents; water flushing is ineffective due to the material's hydrophobicity.
B2B Procurement Guide
When sourcing polyurea thickeners, prioritize suppliers with ISO 9001 certification. Key specifications to evaluate include dropping point (typically >250°C), worked penetration value, and compatibility testing reports with your base oils. Bulk purchases (500kg+) often reduce costs by 10–15%. Request samples for pilot testing, especially for critical applications like high-speed bearings or vacuum environments.
Related Manufacturers
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