Corrosion inhibitor in use for lubricating oil in esters

A technology of lubricating oil and corrosion inhibitor, which is applied in the field of ester lubricating oil, can solve the problems of immiscibility, small acid value of corrosion inhibitor, low polarity, etc., and achieve good reproducibility, excellent thermal stability, and good dissolution sexual effect
CN101092583AInactive Publication Date: 2007-12-26XIAN MODERN CHEM RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN MODERN CHEM RES INST
Publication Date
2007-12-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention discloses a corrosion inhibitor for grease lubricant. The structural formula of the corrosion inhibitor (benzotriazole derivative) is shown in this invention. The corrosion inhibitor is prepared by the reaction between benzotriazole and ester of mono unsaturated acid. The corrosion inhibitor can solve the problem of copper corrosion caused by free acids and corrosive medium due to oxidation of grease lubricant in the using environment.
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Description

technical field

[0001] The invention relates to a corrosion inhibitor for ester lubricating oil, which belongs to benzotriazole derivatives and is mainly used for ester lubricating oil. Background technique

[0002] HFC-134a (1,1,1,2-tetrafluoroethane) is currently recognized as the best substitute for CFC-12 (dichlorodifluoromethane). However, due to its high polarity, it is physically incompatible with traditional mineral oil-based refrigeration lubricants, and the two cannot form a refrigeration system to complete the refrigeration work. Therefore be badly in need of developing the synthetic lubricating oil of the bigger ester structure of molecular polarity that matches with it, just can guarantee the smooth progress of CFC-12 substitution work.

[0003] In order to formulate ester lubricating oils with good performance, in addition to ester base oils, various functional additives must be introduced, the most important of which is the selection of corrosion inhibitors. ...

Claims

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