Application of polymethacrylate as viscosity index improver of energy-saving hydraulic oil and energy-saving hydraulic oil

The invention discloses application of polymethacrylate as a viscosity index improver of energy-saving hydraulic oil and the energy-saving hydraulic oil. The energy-saving hydraulic oil comprises base oil, a complexing agent, a pour point depressant and a viscosity index improver. The viscosity index improver is polymethacrylate of which the molecular weight distribution index is 1.0-1.5. According to the energy-saving hydraulic oil disclosed by the invention, the polymethacrylate with relatively narrow molecular weight distribution is added, so that the prepared energy-saving hydraulic oil has a good energy-saving rate and further has a good energy-saving effect. 本发明公开了一种聚甲基丙烯酸酯作为节能液压油的黏度指数改进剂的应用和节能液压油；该节能液压油包括：基础油、复合剂、降凝剂和黏度指数改进剂，所述黏度指数改进剂为聚甲基丙烯酸酯，所述聚甲基丙烯酸酯的分子量分布指数为1.0-1.5。本发明的节能液压油通过添加分子量分布较窄的聚甲基丙烯酸酯，使得制备的节能液压油具有良好的节能率，进而具有良好的节能效果。