Base oil for hydraulic oil, and composition therefor
    37.
    发明专利
    Base oil for hydraulic oil, and composition therefor 有权
    液压油基础油及其组合物

    公开(公告)号:JP2008308697A

    公开(公告)日:2008-12-25

    申请号:JP2008215671

    申请日:2008-08-25

    Abstract: PROBLEM TO BE SOLVED: To provide a base oil for a hydraulic oil appropriate for an operating oil for a hydraulic power unit provided with a filter having a pore diameter of not greater than 50 μm capable of improving the flow reduction of a hydraulic pump at a low temperature of -30°C or below so as to normally operate the hydraulic power unit, and a hydraulic oil composition using the same, particularly the hydraulic oil composition appropriate for a common lubricant for a tractor provided with the hydraulic power unit, a transmission and the like, and these. SOLUTION: The base oil for a hydraulic oil contains a mineral base oil having a kinetic viscosity at 100°C of 1.5-6 mm 2 /s, a pour point of not higher than -10°C, a viscosity index of not less than 100, a%CP of not less than 70, a%CA of not greater than 2, and an aniline point of not lower than 106°C, which is dewax-treated by a contact dewaxing process, and/or a mineral base oil having a tertiary carbon content in all constituting carbons of 7.4% or more. And, the hydraulic oil composition comprises the base oil, and a polymethacrylate additive contained therein. COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题:为了提供适用于具有孔径不大于50μm的过滤器的液压动力单元的适用于工作油的液压油的基础油,能够改善液压的流动减少 在-30℃以下的低温下泵送,以便正常操作液压动力单元,以及使用该液压动力单元的液压油组合物,特别是适用于设置有液压动力单元的拖拉机的普通润滑剂的液压油组合物 ,传输等,以及这些。 解决方案:用于液压油的基础油包含在100℃下的动力粘度为1.5-6mm 2 / s的矿物基础油,倾点不高于-10 ℃,粘度指数不小于100,%CP不小于70,%CA不大于2,苯胺点不低于106℃,通过接触进行脱蜡处理 脱蜡工艺,和/或所有构成碳的叔碳含量为7.4%以上的矿物基油。 并且,液压油组合物包含基础油和其中所含的聚甲基丙烯酸酯添加剂。 版权所有(C)2009,JPO&INPIT

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