| 摘要 |
PROBLEM TO BE SOLVED: To provide a conductive grease composition which exhibits excellent conductivity and hardly causes oil separation even at high temperatures, hardly exerts bad influences on a resin and hardly leaks when used for a rolling device such as a rolling bearing. SOLUTION: The conductive grease composition G, comprising a synthetic hydrocarbon oil, two kinds of carbon blacks and an additive containing at least either one of an extreme pressure agent and an oily agent, is sealed in a void space of a deep groove ball bearing. The total content of the extreme pressure agent and the oily agent is at least 0.1 mass% and at most 5 mass% based on the whole conductive grease composition G. One of the two kinds of carbon blacks has an average primary particle size of 30 nm, a specific surface area of 800 m<SP>2</SP>/g and a DBP absorption of 360 ml/100 g, while the other carbon black has an average primary particle size of 66 nm, a specific surface area of 27 m<SP>2</SP>/g and a DBP absorption of 68 ml/100 g. COPYRIGHT: (C)2006,JPO&NCIPI |
