摘要:
The invention provides a grease composition containing a base oil, a thickener, and an anti-flaking additive such as a compound represented by, for example, formula (1-1), which grease composition can prevent the white layer flaking of the rolling bearings. (In the formula, R1 and R4 are each independently a straight-chain or branched alkyl or alkenyl group having 1 to 20 carbon atoms.)
摘要:
The invention provides a silicone grease composition where the high friction properties are improved, with no decrease of the wear preventive characteristics. The silicone grease composition contains a thickener, a base oil containing a silicone oil in an amount of 50 mass% or more of the total mass of the base oil, and a metallic oxide with a Mohs hardness of 6 or less as a friction modifier.
摘要:
The invention provides a lubricating grease composition with a worked penetration of 400 to 500 for a machine tool equipped with an automatic lubricator, containing a base oil having a kinematic viscosity at 40°C of 10 to 200 mm 2 /s and 0.1 to 10 mass% of solid particles insoluble in the base oil. The lubricating grease composition of the invention can be fed using the automatic lubricator attached to the machine tool, and can prevent the stick-slip from occurring on the sliding lubrication portion of the machine tool.
摘要:
The invention provides a grease composition for bearings used in wind power generators, containing a base oil which has a kinematic viscosity of 10 to 70 mm 2 /s at 40°C and a pour point of -40°C or less, and a diurea compound as a thickener, for example, a diurea compound represented by formula (1) where R 1 and R 2 are both C8-alkyl group. The grease composition for bearings used in wind power generators according to the invention can meet the requirements in terms of the seizure life and the pumpability as well as the fatigue life (flaking life).
摘要:
The invention provides a grease composition for rolling bearings of automotive electrical equipment or automotive auxiliaries, containing a base oil that includes as an essential component an alkyldiphenyl ether oil; a diurea thickener represented by formula (1); an anti-flaking additive including an organic sulfonate rust inhibitor and a load carrying additive; and an antioxidant. In the formula (1), R 2 is a bivalent aromatic hydrocarbon group having 6 to 15 carbon atoms; and one of R 1 or R 3 represents cyclohexyl group and the other represents cyclohexyl group, an alkyl group having 8 to 22 carbon atoms or an aromatic hydrocarbon group having 6 to 12 carbon atoms.