Thickener formulation plays a significant role in the performance characteristics of grease. The polyurea greases (PUGs) were synthesized using mineral oil (500SN) as the base oil, and by regulating the reaction of diphenylmethane diisocyanate (MDI) and different organic amines. The as-prepared PUGs from the reaction of MDI and cyclohexylamine/p-toluidine exhibit the optimum physicochemical and friction-wear properties, confirming that the regulation of thickener formulation can improve the performance characteristics of grease, including friction reduction, wear, corrosion resistance, and load-carrying capacity. The anti-corrosion and lubrication properties of as-prepared PUGs depend on good sealing functions and a boundary lubrication film (synergy of grease-film and tribo-chemical reaction film), as well as their chemical components and structure.

增稠剂配方在润滑脂的性能特征中起着重要作用。使用矿物油（500SN）作为基础油，并通过调节二苯基甲烷二异氰酸酯（MDI）与不同有机胺的反应来合成聚脲润滑脂（PUG）。由MDI与环己胺/对甲苯胺反应制得的PUG具有最佳的理化和摩擦磨损性能，这证实了增稠剂配方的调节可以改善润滑脂的性能特征，包括降低摩擦，降低磨损，耐腐蚀，和承载能力。制备的PUG的抗腐蚀和润滑性能取决于良好的密封功能和边界润滑膜（油脂膜和摩擦化学反应膜的协同作用），