Calcite type flaky calcium carbonate, lubricating grease containing calcite type flaky calcium carbonate and preparation method of calcite type flaky calcium carbonate

By preparing a sheet-like calcium carbonate thickener, the structural stability of the grease is improved, solving the problem of loss of inorganic rod-shaped calcium carbonate grease at high temperatures. This results in improved performance of the grease at high temperatures, making it suitable for high-temperature and high-load conditions.

CN122144772APending Publication Date: 2026-06-05HENAN UNIVERSITY
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Patent Information

Application Number
CN202610172066.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-06
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing inorganic rod-shaped calcium carbonate greases exhibit a significant decrease in viscosity and an increase in fluidity at high temperatures, leading to a decline in tribological properties. Furthermore, organic-inorganic composite soap-based greases have complex compositions, making it difficult to control process parameters and resulting in poor production stability.

Method used

A flaky calcium carbonate thickener was prepared by reacting high-alkalinity calcium sulfonate with a morphology modifier. By controlling the morphology and size of the thickener, the specific surface area of ​​the thickener was increased, thereby enhancing the structural stability of the grease. A stable grease was prepared by mixing and grinding base oil with flaky calcium carbonate powder using a pre-processing method.

Benefits of technology

The prepared grease maintains good dropping point and colloidal stability at high temperatures, exhibits excellent high-temperature tribological properties and extreme pressure properties, is suitable for harsh working conditions with high temperature and high load, has good batch stability, and is applicable to the field of high-temperature greases.

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Abstract

The invention provides calcite type flaky calcium carbonate lubricating grease and a preparation method thereof. The method comprises the following steps: uniformly stirring 20-40 parts of overbased calcium sulfonate, 10-30 parts of an organic solvent and 2-10 parts of distilled water at 20-50 DEG C; then adding 2-8 parts of a morphology regulating agent, introducing CO2 gas, and reacting for 1-3 hours; then carrying out solid-liquid separation, washing and drying to obtain a calcium carbonate thickening agent; the preparation method comprises the following steps: uniformly mixing 20-60 parts of calcium carbonate thickening agent powder and 40-80 parts of base oil, stirring at 160 + / -10 DEG C, carrying out a thickening reaction for 30-90 min, continuously carrying out heat preservation at 200 + / -20 DEG C for 10-20 min, cooling, and grinding. The method has the advantages of low cost, simple raw materials and preparation process and stable production batch, and can effectively solve the problems of unstable batch, complex preparation process and the like of the existing lubricating grease. The calcium carbonate lubricating grease prepared by the invention has outstanding high-temperature tribological properties, a dropping point higher than 385 DEG C and excellent shear stability and extreme pressure properties, and can meet the lubrication requirements under harsh working conditions such as high temperature and high load.
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