Heavy-duty vehicle gear oil composition with viscosity grade of 75W-90 and application thereof

Abstract

The invention relates to a heavy-duty vehicle gear oil composition with a viscosity grade of 75W-90. The composition is composed of the following components in parts by weight: 70-80 parts of hydrogenated base oil, 10-20 parts of a viscosity index improver and 1-20 parts of a complexing agent, wherein the viscosity index improver is a random copolymer of ethylene and alpha-olefin, and the complexing agent comprises one or more selected from a sulfur-containing extreme pressure agent, a phosphorus-containing anti-wear agent, a friction modifier, a detergent dispersant, an antioxidant, an antirust agent and a pour point depressant. The heavy-duty vehicle gear oil composition provided by the invention has excellent performance and a wide application range; the shearing stability performance of heavy-duty vehicle gear oil can be improved to a large extent; and special requirements of clients to the heavy-duty vehicle gear oil with a viscosity grade of 75W-90 can be met. The composition isgood in stability and excellent in low-temperature performance. In addition, the heavy-duty vehicle gear oil composition with a viscosity grade of 75W-90 provided by the invention has simple components, easily acquired raw materials, and a simple and easy preparation method, and has a wide large-scale application prospect.

Description

technical field [0001] The invention relates to the field of lubricating oil, in particular to a 75W-90 viscosity level heavy-duty vehicle gear oil composition with excellent shear stability. Background technique [0002] 75W-90 viscosity grade heavy-duty vehicle gear oil (GL-5) is mainly used for the lubrication of the gear structure in the vehicle drive axle, and the vehicle drive axle is a key component in the power transmission of the vehicle, and the kinematic viscosity of the oil drops too quickly during use Will affect the lubrication of the drive axle. At present, vehicle manufacturers and drive axle OEMs have put forward higher requirements on the shear resistance of oil products. Therefore, in order to better meet the requirements of equipment lubrication, it is necessary to optimize the KRL shear stability of oil products. The specific requirements are shown in the table 1. [0003] Table 1 SAE J306 75W-90 viscosity grade heavy-duty vehicle gear oil (GL-5) index...

AI Technical Summary

Problems solved by technology

The existing 75W-90 viscosity grade heavy-duty vehicle gear oil (GL-5) cannot fully meet the performance requiremen

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