HYDRAULIC OIL FOR USE IN CONSTRUCTION MACHINERY
    1.
    发明申请
    HYDRAULIC OIL FOR USE IN CONSTRUCTION MACHINERY 审中-公开
    液压油用于建筑机械

    公开(公告)号:US20100298186A1

    公开(公告)日:2010-11-25

    申请号:US12679577

    申请日:2008-09-23

    IPC分类号: C10M145/14

    摘要: Hydraulic oil for use in construction machinery, wherein the hydraulic oil comprises a poly(meth)acrylate of weight average molecular weight in the range of from 30,000 to 100,000 in a highly refined base oil but does not incorporate an oiliness agent, and wherein the kinetic viscosity at 60° C. is in the range of from 25 to 60 mm{hacek over ( )}/s, the kinetic viscosity at 80° C. is in the range of from 15 to 34 mm{hacek over ( )}/s, the viscosity index is in the range of from 200 to 220, and the low temperature cranking viscosity at 25° C. is in the range of from 1000 to 8000 mPa·s. The hydraulic oil of the present invention not only has a high kinetic viscosity in the high-temperature domain even though the incorporation of an oiliness agent is omitted, and can thereby effect satisfactory operation efficiently and which has excellent braking characteristics, but which also has a low viscosity in the low-temperature domain and so has excellent low-temperature performance.

    摘要翻译: 用于工程机械的液压油,其中所述液压油包含在高度精炼的基础油中重均分子量为30,000至100,000的聚(甲基)丙烯酸酯,但不包含油性剂,并且其中所述动力学 在60℃下的粘度在25至60mm的范围内(hacek over()} / s),80℃下的动力粘度在15至34mm的范围内(hacek over()} / s,粘度指数在200〜220的范围内,25℃下的低温起动粘度在1000〜8000mPa·s的范围内。 本发明的液压油即使省略了油性剂的结合,也不仅在高温区域具有高动力粘度,因此能够有效地实现令人满意的操作,并且具有优异的制动特性,但也具有 在低温区域粘度低,所以具有优异的低温性能。