This invention discloses a high-
antioxidant, anti-coking high-temperature chain
lubricant and its preparation method, belonging to the field of chain
lubricant preparation technology. It comprises the following components by
mass percentage: 70%-85%
base oil, 5%-10%
antioxidant, 3%-8% anti-coking agent, 1%-3% extreme pressure anti-wear agent, 0.1%-0.5%
pour point depressant, 0.01%-0.05% antifoaming agent, and the remainder being unavoidable impurities. The
base oil is a mixture of synthetic
hydrocarbon oil and polyether oil. This invention prepares the
antioxidant complex by rationally selecting a complex of hindered phenolic and amine antioxidants and precisely controlling their ratio under specific temperature and stirring conditions. In accelerated oxidation tests, the increase in
acid value after prolonged high-temperature oxidation is minimal, effectively delaying the oxidative deterioration process of the
lubricant, significantly extending its service life under high-temperature environments, reducing equipment
downtime due to lubricant oxidation failure, and improving production efficiency.