High-temperature-resisting and low-temperature-resisting extreme pressure lubricating grease with long service life and preparation method thereof

Abstract

The invention discloses high-temperature-resisting and low-temperature-resisting extreme pressure lubricating grease with long service life and a preparation method thereof. The lubricating grease isprepared from the following components in percentage by weight: 80 percent to 85 percent of mixed basic oil, 9 percent to 16 percent of a thickening agent, 0.5 percent to 1.5 percent of a structure improver, 1.0 percent to 3.0 percent of an extreme pressure anti-wear agent, 0.5 percent to 1.5 percent of a metal deactivating agent, 0.05 percent to 1.5 percent of an anti-rust agent and 0.3 percent to 1.5 percent of an antioxidant, wherein the mixed basic oil contains alkyl naphthalene and the alkyl naphthalene accounts for 10 weight percent to 30 weight percent of the mixed basic oil. The high-temperature-resisting and low-temperature-resisting extreme pressure lubricating grease has the advantages that the product has excellent high temperature performance, water resistance, extreme pressure resistance and anti-wear performance and has a stable structure; the production is safe and environmentally friendly and the technology is simple; the high-temperature-resisting and low-temperature-resisting extreme pressure lubricating grease is suitable for various lubricating occasions with high-temperature-resisting and low-temperature-resisting requirements and extreme pressure anti-wear requirements, such as fields including automobile hub bearings, equal-speed universal joints and high-temperature bearings.

Description

technical field [0001] The invention belongs to the field of lubricating grease, and in particular relates to a high-low temperature resistant long-life extreme-pressure lubricating grease and a preparation method thereof. Background technique [0002] Under the current situation of global economic slowdown, equipment owners and operators hope to reduce equipment maintenance costs, which makes people look for equipment that can still perform well under high temperature, low temperature, heavy load and other conditions, and has long grease change intervals. Long-life greases create greater demands. The high dropping point grease mainly includes calcium complex grease, lithium complex grease, aluminum complex grease, calcium sulfonate complex grease, polyurea grease and bentonite grease, among which lithium complex grease It has the advantages of safety and environmental protection in the production process, advanced production technology, good compatibility with additives, a...

AI Technical Summary

Problems solved by technology

CN105087108A discloses a high and low temperature resistant lubricating grease and its preparation method, which is formed by thickening polyalphaolefin with composite calcium sulfonate soap and adding additives such as extreme pressure and oxidation. Not only the preparation process is complicated, but the product stability is poor , and the product is prone to hardening problems after being placed for a long time

CN102286306A also proposes a high-temperature, water-resistant, long-life complex lithium-calcium-based grease and its preparation method, which uses the mixture of complex calcium sulfonate soap and complex lithium-calcium soap as the thickener, the production process is complicated, and the dropping point of the prepared product is Below 300°C, at the same time, the addition of complex calcium sulfonate soap will affect the low-temperature performance of the product, which cannot better meet the requirements of low-temperature use

In addition, the low-temperature lubricating greases reported in other related patents are mostly made of polyalphaolefin or ester oil thickened with lithium soap and lithium complex soap. There are problems such as the need for prefabricated soap or the poor compatibility of the grease with additives, which will cause problems accordingly. Increase production difficulty or reduce product performance

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