Mechanical hydraulic oil and preparation method thereof

The invention relates to mechanical hydraulic oil and a preparation method thereof. The mechanical hydraulic oil is prepared from, by weight, 8-10 parts of olefin copolymer, 12-15 parts of dicarboxylic ester, 9-14 parts of polymethacrylate, 10-15 parts of diester type compounds, 20-25 parts of dimethyl silicone oil, 10-14 parts of naphthenic base oil, 5-9 parts of benzotriazole and 7-10 arts of sulfide polyisobutylene. The mechanical hydraulic oil has the beneficial effects that the viscosity-temperature characteristic of the hydraulic oil is good, and the hydraulic oil is made to use within a wide temperature range and has good viscosity and oil film thickness; the ignition point is high, the safety of the hydraulic oil can be guaranteed, and transporting, storage and use of the hydraulic oil are facilitated; the anti-foaming performance is good, and it is prevented that a small amount of water enters the hydraulic oil, and consequently emulsification happens; and the oxidization stability is good. 本发明涉及种机械液