| abstract |
A grease composition for use in a constant velocity joint comprises a base oil containing (A) 5-25% by weight of a diurea thickener of the formula: <IMAGE> (wherein each of R1 and R2 is a C6 aryl group, or a cyclohexyl group, the C6 aryl group forming 100 to 25 mol% of the total of R<1> and R<2>); (13) 0.5-3% by weight of molybdenum sulfide dialkyldithiocarbamate; (C) 0.5-3% by weight of an extreme pressure additive which is a zinc dithiophosphate of the formula: <IMAGE> (wherein R is an alkyl or aryl group); (D) 0.5-3% by weight of a sulfur-phosphorus series extreme pressure additive containing no metallic element and having a sulfur content of 10-30% by weight and a phosphorus content of 0.5-5% by weight; and (E) 0.5-3% by weight of lead dialkyldithiocarbamate. |