LUBRICANT BASE OIL AND LUBRICANT COMPOSITION

• Main Authors: NAKAHARA YASUHITO, KOBAYASHI KENJI, KAMANO HIDEKI
• Format: Patent
• Language: English; Japanese
• Published: 26.09.2019
• Subjects: CHEMISTRY; FUELS; LUBRICANTS; LUBRICATING COMPOSITIONS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

To provide the lubricant base oil and the lubricant composition comprising the lubricant base oil, wherein the lubricant base oil has a high dielectric constant sufficient to function as a capacitor, is insulating, and allows easy preparation of the lubricant composition that has a good swelling property to a rubber material.SOLUTION: A base oil (A1) has a relative dielectric constant εof less than 3.0 at 1 MHz, and the lubricant base oil comprises the base oil (A2) having the relative dielectric constant εof 3.0 or more at 1 MHz.SELECTED DRAWING: None 【課題】コンデンサーとしての機能を担うほどに高比誘電率であって、絶縁性であり、ゴム材への膨潤性が良好である潤滑油組成物を容易に調製し得る、潤滑油用基油、及び、当該潤滑油用基油を含む潤滑油組成物を提供する。【解決手段】１ＭＨｚにおける比誘電率εｒ（Ａ１）が３．０未満である基油（Ａ１）と、１ＭＨｚにおける比誘電率εｒ（Ａ２）が３．０以上である基油（Ａ２）と、を含む、潤滑油用基油。【選択図】なし