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Grease compositions

a composition and metal technology, applied in the field of grease compositions, can solve the problems of increasing the cost of additional treatments, and requiring additional treatments, so as to achieve low cost, easy manufacturing, and attractive low friction performance

Inactive Publication Date: 2017-12-21
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about creating grease compositions that have excellent lubricating properties and can be made at low costs. The grease compositions also have low friction performance. They include one or more amides that have a certain structure introduced by unsaturated bonds and an OH group. When different fatty acids are used, they should have different numbers of carbon atoms, and this is important for achieving low friction performance. The grease compositions can be used in applications such as mining and cement. Overall, the patent provides a technical solution for creating attractive grease compositions with excellent lubricating properties.

Problems solved by technology

Conventional metal soap greases can still be sensitive to poor thermo-mechanical stability and can require additional treatments.
The process of grease cooking and milling and additional treatments is relatively expensive because it is carried out at an elevated temperature and over a relatively long period of time.
Moreover, the greases so prepared are still unsuitable for a variety of applications, and not all conventional greases are suitable for food and beverage processing applications.

Method used

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  • Grease compositions

Examples

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examples

[0098]The performance of four grease compositions has been tested on tribological and friction performance on the Ball-on-disc, the Mini Traction Machine, at Imperial College, London UK. In each case the test procedure consists of four steps, i.e. first a grease working step which is followed by three consecutive Stribeck step tests. Two grease samples from each of the four grease compositions have undergone the entire test procedure. These duplications were performed to monitor the repeatability of the test between two different tests carried out in the exact same conditions. The same ball and disc used for each of the grease samples were cleaned prior to running of the tests and the test repeat. The tests were run with fresh grease. The grease working step had the purpose of ensuring an even distribution of the grease and to prepare the same initial condition for each test, by shearing the grease in the same way and for the same time, before the start of the actual test. In Table ...

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Abstract

The invention relates to a grease composition including a base oil and a thickener that provides hydrophilic metal oxide particles and one or more amides which contain one or more unsaturated C—C bonds and / or at least one OH group. The hydrophilic metal oxide particles have a BET specific surface area of at least 10 m2 / g and at least 80% of the hydrophilic metal oxide particles have a particle size in the range of from 5 nm to 900 μm. The amount of the thickener is in the range of from 0.1-40% by weight, based on the total weight of the grease composition. The invention further relates to methods for manufacturing the grease composition, and the use of the grease composition for lubricating bearings, gears and couplings.

Description

FIELD OF THE INVENTION[0001]The present invention relates to grease compositions, methods for manufacturing the grease compositions, and the use of the grease compositions for lubricating bearings, gears and couplings.BACKGROUND OF THE INVENTION[0002]Grease compositions are widely used for lubricating bearings and other structural components. A grease is an essential product to reduce, for example, wear, friction, running temperatures and energy losses. Greases are materials which provide a base oil that is thickened with a metal soap, and they are usually prepared by reacting a metal hydroxide with a fatty acid in the presence of the base oil. Conventional metal soap greases require an energy intensive grease cooking and milling process in order to achieve proper thermo-mechanical stability. Conventional metal soap greases can still be sensitive to poor thermo-mechanical stability and can require additional treatments. It is known to improve further the stability, and thus the lubr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M169/00C10M133/16C10M101/00C10M113/16
CPCC10M169/00C10N2240/04C10M101/00C10M133/16C10M2203/003C10M2227/06C10M2227/006C10M2223/041C10M2223/047C10M2223/043C10M2215/30C10M2219/082C10M2215/28C10N2250/10C10N2240/02C10M113/16C10M169/02C10M2201/0626C10M2205/0285C10M2201/1056C10M2203/1025C10M2215/082C10M2215/08C10M2215/223C10M2207/1285C10M2207/1265C10M2207/123C10N2010/04C10N2020/06C10N2030/06C10N2040/02C10N2040/04C10N2050/10
Inventor FIDDELAERS, FRANKEUSTATHIOS, IOANNIDES
Owner AB SKF
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