Antioxidant composition for lithium-based lubricating grease

Abstract

The invention provides an antioxidant composition for lithium-based lubricating grease. The antioxidant composition is composed of amines or phenols and copper dimethyl dithiocarbamate; and a lithium-based lubricating grease sample added with the antioxidant composition has good antioxidant stability and long service life.

Description

technical field [0001] In particular, the present invention relates to an antioxidant composition for lithium-based lubricating grease. Background technique [0002] The metal ion of fatty acid soap in the grease system is the catalyst for the oxidation reaction of the grease. Under high temperature and long-term working conditions, it will accelerate the oxidation of the grease, which will lead to the destruction of the structure of the grease, resulting in the separation of soap and oil, and the formation of corrosive products. , the service life is shortened. The addition of antioxidants can hinder the oxidation of grease, passivate the catalytic effect of metals, and greatly prolong the service life of grease. Traditional antioxidants such as amine antioxidants, phenolic antioxidants, and zinc dialkyldithiophosphate (ZDDP) have certain thermal stability and oxidation resistance, which can prolong the life of lubricating greases. Many scholars have Researched and recomm...

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Problems solved by technology

[0002] The metal ion of fatty acid soap in the grease system is the catalyst for the oxidation reaction of the grease. Under high temperature and long-term working conditions, it will accelerate the oxidation of the grease, which will lead to the destruction of the structure of the grease, resulting in the separation of soap and oil, and the formation of corrosive products. , shortened service life

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