Wear-resistant lubricating grease composition and preparation method thereof

By adding boric acid modified nanofillers and chitosan quaternary ammonium salt modified elastic particles to the composite calcium sulfonate-based grease, forming a connection network, the problem of insufficient lubrication stability and wear resistance of existing greases under high temperature and high load conditions is solved, and higher extreme pressure wear resistance and stability is achieved, and it is suitable for a wide range of mechanical equipment applications.

CN119709306AActive Publication Date: 2025-03-28HUBEI BODA SPECIAL LUBRICANT CO LTD
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Patent Information

Application Number
CN202510241864.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-03
Publication Date
2025-03-28
Estimated Expiration
2045-03-03

AI Technical Summary

Technical Problem

The lubrication stability of existing composite calcium sulfonate-based greases is poor, and the extreme pressure wear resistance is insufficient, making it difficult to meet the lubrication needs of mechanical equipment under high temperature and high load conditions.

Method used

The calcium sulfonate, boric acid modified nanofiller, chitosan quaternary ammonium modified elastic particles are used to treat calcium sulfonate particles through phosphatidylserine and polyvinyl alcohol solutions to form a connection network, combining the compressive and buffering effects of nanofillers and elastic particles to improve the extreme pressure wear resistance and stability of the grease.

Benefits of technology

It significantly improves the extreme pressure anti-wear performance and stability of the grease, so that it can effectively reduce the wear between metals under high temperature and high load conditions. It is suitable for various mechanical equipment and can even be used in helicopters.

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Abstract

The invention relates to the field of lubricating compositions, and particularly discloses an anti-wear lubricating grease composition and a preparation method thereof. The anti-wear lubricating grease composition comprises 45-60 parts of calcium sulfonate, 60-80 parts of oil, 2-6 parts of alcohol, 2-5 parts of boric acid modified nano filler, 2-6 parts of a surfactant, 1-2 parts of an antioxidant, 1-5 parts of chitosan quaternary ammonium salt modified elastic particles, 20-40 parts of water, 15-25 parts of an emulsifier and 1-2 parts of a defoaming agent. The preparation method comprises the following steps: uniformly mixing the calcium sulfonate and the oil, adding the surfactant, and uniformly mixing to obtain a primary mixture; adding alcohol, boric acid modified nanofiller, chitosan quaternary ammonium salt modified elastic particles, water and an emulsifier, and mixing to obtain a mixture; heating the mixture to 180-190 DEG C, keeping the temperature for 5-8 minutes, then cooling to 90-100 DEG C, adding a defoaming agent and an antioxidant, uniformly mixing, homogenizing and degassing to obtain a finished product. The lubricating oil has the advantages of good extreme pressure wear resistance and high stability.
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