GREASE COMPOSITION FOR CONSTANT VELOCITY JOINT, AND CONSTANT VELOCITY JOINT

PROBLEM TO BE SOLVED: To provide a grease composition for constant velocity joint which keeps frictional characteristics that are identical with those in an initial period even when receiving heat and shear.SOLUTION: There is provided a grease composition that contains base oil containing mineral oil, a thickening agent represented by formula (1): R1-NHCONH-R2-NHCONH-R3 (in the formula, R2 represents a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms; and R1 and R3 may be the same or different from each other and represent an alkyl group having 6 or 7 carbon atoms or a cyclohexyl group), and an organomolybdenum compound that is represented by formula (2): [RRN-CS-S]-MoOS(in the formula, Rand Rmay be the same or different from each other and represent a straight chain or branched alkyl group having 11 to 20 carbon atoms, and m is 0-3 and n is 0-4, and a relationship of m+n=4 holds), and is liquid at 25°C, where the composition contains 4-10 mass% of the organomolybdenum compound based on the total mass of the composition.SELECTED DRAWING: None 【課題】熱やせん断を受けても初期と変わらぬ摩擦特性を維持する等速ジョイント用グリース組成物の提供。【解決手段】鉱油を含む基油、式（１）で表される増ちょう剤、及びＲ１−ＮＨＣＯＮＨ−Ｒ２−ＮＨＣＯＮＨ−Ｒ３ （１）（式中、Ｒ２はＣ６〜１５の２価の芳香族炭化水素基であり、Ｒ１及びＲ３は、互いに同一でも異なっていてもよく、Ｃ６又は７のアリール基又はシクロヘキシル基である。）式（２）で表され、２５℃で液体である有機モリブデン系化合物、[Ｒ3Ｒ4Ｎ−ＣＳ−Ｓ]2−Ｍｏ2ＯmＳn（２）（式中、Ｒ3，Ｒ4は、互いに同一でも異なっていても良く、それぞれＣ１１〜２０の直鎖又は分岐アルキル基である。ｍは０〜３、ｎは１〜４であり、ｍ＋ｎ＝４である。）を含有し、前記組成物が、組成物の全質量を基準として、有機モリブデン系化合物を４〜１０質量％含有する、前記グリース組成物。【選択図】なし