| abstract |
The invention relates to a grease composition for high temperature, speed and load conditions, comprising: (i) a lubricating base oil, comprising as an essential component an alkyldiphenyl ether lubricant and having a kinematic viscosity of 0.000009 to 0.000016 m2 / s at 40 ° C, and (ii) 22-30% by weight, based on the fat composition, of a diurea serving as a thickener, the diurea being represented by the following formula: (CF DRAWING IN BOPI) in which R2 is an aromatic hydrocarbon group having 6-15 carbon atoms, R1 and R3 represent aromatic hydrocarbon groups having 6-12 carbon atoms or linear alkyl groups having 8-20 carbon atoms, the proportion of aromatic hydrocarbon groups in R1 and R3 being 70-95 mol%; and the NLGI index of the composition ranging from Ndegre 1 to Ndegré 3. |