Compound calcium sulfonate grease and preparation method thereof

Abstract

The invention relates to compound calcium sulfonate grease and a preparation method thereof. The compound calcium sulfonate grease is prepared from 30 to 40% of high base number calcium sulfonate, 2 to 3% of isopropanol, 1.5 to 2.5% of dodecyl sulfonic acid, 4 to 5% of 12-hydroxyl stearic acid, 3 to 4% of boric acid, 1% of micro powder calcium carbonate, 4 to 5% of calcium hydroxide, 5% of water, 1 to 2% of amine and phenol compound and 32.5 to 48.5% of base oil. According to the compound calcium sulfonate grease disclosed by the invention, converting agents of middle molecule alcohol and organic acid are combined and utilized, meanwhile the amine and phenol compound is added into a system, and the problem that the compound calcium sulfonate grease in the prior art is prone to surface hardening in a storage and use process is solved. In a compound calcium sulfonate grease preparation process, a pressure kettle is utilized as a reactor, a cooling reflux device is arranged to prevent the converting agents and water from volatilizing, the problem of repeatedly replenishing water for materials in a reaction process is solved, the converting agents and the water are removed by pressure reduction and vacuumization after converting reaction finishes, and the residual converting agents are prevented from enabling the system to react continuously to cause the problem of product hardening.

Description

technical field [0001] The invention relates to the field of lubricating grease, in particular to a composite calcium sulfonate-based grease and a preparation method thereof. Background technique [0002] The emergence of complex soap-based grease has made it possible for high dropping point soap-based grease to enter the lubrication field. Calcium complex grease has good extreme pressure properties, lithium complex grease has good mechanical stability, and aluminum complex grease has excellent water resistance. These complex soap greases only have excellent performance in a specific index. Performance, and complex calcium sulfonate-based grease has attracted widespread attention from domestic and foreign grease industries for its comprehensive and excellent performance since its inception. Especially in Europe and the United States, its development is very fast, especially in the working conditions where traditional lubricating grease is difficult to do, complex calcium su...

AI Technical Summary

Problems solved by technology

[0004] In the manufacture process of compound calcium sulfonate base grease, there are following two technical problems: the one, the transforming agent commonly used in prior art is small molecule organic acid or alcohol, and organic acid is due to self intermolecular hydrogen bonding, forms The network structure makes the material quickly lose fluidity, and the crystal transformation reaction of calcium carbonate cannot continue. From the results, although the product is very hard, the dropping point is still low, and the phase transformation effect is poor; moreover, in the reaction process, Low-molecular alcohol and water will volatilize in the form of steam, thereby reducing the conversion rate, and the volatilization of alcohol will affect the production site environment

Second, the complex calcium sulfonate base grease is prone to surface hardening problems during storage and use

However, the preparation method provided by this patent does not remove the unreacted phase inversion agent in the system, and the residual phase inversion agent is easy to make the system continue to react, thus causing the product to harden; on the other hand, the patent provides The preparation method of the prior art does not solve the problem that the complex calcium sulfonate base grease is prone to surface hardening during storage and use

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