LUBRICANT BASE OIL COMPOSITION
To provide a lubricant base oil composition that can reduce fuel consumption, can reduce low-temperature viscosity, can ensure relatively high viscosity at a high temperature, and can reduce difference between viscosity under a low temperature and the viscosity under the high temperature.SOLUTION: T...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a lubricant base oil composition that can reduce fuel consumption, can reduce low-temperature viscosity, can ensure relatively high viscosity at a high temperature, and can reduce difference between viscosity under a low temperature and the viscosity under the high temperature.SOLUTION: There is provided a lubricant base oil composition comprising a lubricant base oil and a copolymer, in which a content of the copolymer is 2 to 20 wt.% based on the total weight of the lubricating base oil composition, and the copolymer is a comb polymer including (i) a repeating unit derived from a polyolefin-based macromonomer, and (ii) a repeating unit derived from a small-molecule monomer selected from the group consisting of (alkyl)styrene monomer, alkyl (meth)acrylate, vinyl ester, alkyl vinyl ether, (di)alkyl fumarate, (di)alkyl maleate, and a mixture of these monomers.SELECTED DRAWING: None
【課題】燃費を低減し、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基油組成物の提供。【解決手段】潤滑油基油、及び共重合体を含有する潤滑油基油組成物であって、潤滑油基油組成物の全重量に対する共重合体の含有量が２〜２０重量％であり、前記共重合体が、（i）ポリオレフィンベースのマクロモノマーに由来する繰り返し単位と、（ii）（アルキル）スチレンモノマー、アルキル（メタ）アクリレート、ビニルエステル、アルキルビニルエーテル、（ジ）アルキルフマレート、（ジ）アルキルマレエート、およびこれらのモノマーの混合物からなる群から選択される低分子モノマーに由来する繰り返し単位と、を含む櫛形ポリマーである、潤滑油基油組成物。【選択図】なし |
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