synthesis of polyurea thickeners for perspective greases

TTwo methods of the synthesis of polyurea thickeners for greases were proposed, in the VM-6 vacuum oil and in the toluene medium. A number of thickener samples were obtained based on 2,4-toluylene diisocyanate and Isophorone diisocyanate. It was demonstrated that a wider range of polyurea thickeners can be applied using toluene as a dispersion medium for the synthesis. Comparative data on Thermostability of polyurea greases based on two diisocyanates were presented.