Patent ID: 6352961
Filing Date: 2002-03-05
Classification: C10M,C10N,F16C

Abstract:
A grease composition for a rolling bearing used in an engine auxiliary machinery, comprising a base oil, an extender, an inorganic compound-based filler and zinc dithiocarbamate, wherein said inorganic compound-based filler is spherical, has an average particle diameter of not more than 2 &mgr;m and comprises at least one particulate material selected from the group consisting of Al2O3, MgO, TiO2 and diamond; the content of said inorganic compound-based filler is from 0.001% to 10% by weight based on the total weight of the composition; said zinc dithiocarbamate is a compound represented by the following formula (1): wherein R1 to R4 each represents a C1-18 hydrocarbon group, and is present in a content of from 0.05 to 10% by weight based on the total weight of the composition; and said extender is a diurea compound represented by the following formulae (2) to (4): wherein R5 represents C6-12 aromatic ring-containing hydrocarbon group; R6 represents a C6-15 divalent aromatic ring-containing hydrocarbon group; and R7 represents a cyclohexyl group or C7-12 alkylcyclohexyl group, and the content of said diurea compound is from 9 to 38% by weight based on the total weight of the composition.