LUBRICANT COMPOSITION
To provide the lubricant composition that can reduce fuel consumption, can reduce low temperature viscosity, can ensure relatively high viscosity at a high temperature, and has a small difference between viscosity at a low temperature and the viscosity at the high temperature.SOLUTION: The lubricant...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide the lubricant composition that can reduce fuel consumption, can reduce low temperature viscosity, can ensure relatively high viscosity at a high temperature, and has a small difference between viscosity at a low temperature and the viscosity at the high temperature.SOLUTION: The lubricant composition comprises: (A) a lubricant base oil having a kinematic viscosity at 100°C of 2 to 4 mm2/s; and (B) a (co)polymer having a main chain having a repeating unit derived from a polymerizable monomer and a side chain having a polyolefin structure, and the lubricant composition contains the (B) (co)polymer in an amount of 0.1 to 10 mass% based on total weight of the lubricant composition, and has a kinematic viscosity at 40°C of 10 to 30 mm2/s, and has a kinematic viscosity at 100°C of 5 to 10 mm2/s.SELECTED DRAWING: None
【課題】本発明は、燃費の低減を目的とし、低温粘度を低減し、且つ、高温での比較的高い粘度を確保し、及び、低温下での粘度と高温下での粘度の差が小さい潤滑油組成物を提供することを目的とする。【解決手段】（Ａ）１００℃における動粘度２〜４ｍｍ２／ｓを有する潤滑油基油、及び（Ｂ）重合性モノマー由来の繰り返し単位を有する主鎖と、ポリオレフィン構造を有する側鎖とを有する（共）重合体を含有する潤滑油組成物であって、前記（Ｂ）（共）重合体を潤滑油組成物の全重量に対し０．１〜１０質量％で含有し、４０℃における動粘度１０〜３０ｍｍ２／ｓを有し、且つ、１００℃における動粘度５〜１０ｍｍ２／ｓを有する、前記潤滑油組成物。【選択図】なし |
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