Grease compositions for rolling bearing

摘要

PCT No. PCT/JP96/01709 Sec. 371 Date Feb. 20, 1997 Sec. 102(e) Date Feb. 20, 1997 PCT Filed Jun. 20, 1996 PCT Pub. No. WO97/00927 PCT Pub. Date Jan. 9, 1997A grease composition for a rolling bearing comprising, based on 100 parts by weight of a base oil, 10 to 60 parts by weight of a mixture of diurea compounds as a thickener having a composition of 25 to 90 mol % of a diurea compound represented by the formula (1), 9 to 50 mol % of a diurea compound represented by the formula (2), 1 to 30 mol % of a diurea compound represented by the formula (3), wherein R1 stands for an aromatics-containing hydrocarbon group having 7 to 12 carbon atoms, R2 stands for a divalent aromatics-containing hydrocarbon group having 6 to 15 carbon atoms, and R3 stands for a cyclohexyl group or an alkylcyclohexyl group having 7 to 12 carbon atoms, a value of (number of R1/(number of R1+number of R3)) in the mixture being 0.55 to 0.95. <IMAGE> (1) <IMAGE> (2) <IMAGE> (3)