Lithium Complex Grease Supplier In Malaysia

Davor has been supplied lithium complex grease to solve most customer's bearing premature failure. The reason is lithium complex greases possess many of the properties of simple lithium soap greases and also have higher dropping points, allowing the greases to be used at higher temperatures.

A comparison of the thickener-related properties of the products is given in table Below. 

The dropping point of lithium complex greases is higher than that of simple lithium soap greases due to the presence of a second thickener component, known as the complexing agent. Modern lithium complex greases typically use a shorter chain-length difunctional carboxylic acid, such as azelaic acid or adipic acid. The lithium salt of these materials is typically present in a significantly lower proportion compared to the simple lithium soap thickener. An alternate material used as a complexing agent is boric acid. The use of this material also results in an elevated dropping point.

Mechanical stability, also known as shear stability, is the ability of grease to maintain consistency when subjected to mechanical shear forces. Simple lithium greases have good resistance to breakdown due to shear, and lithium complex greases also exhibit good resistance to shear. This property makes both simple lithium and lithium complex greases popular for use in a wide range of applications.

The water resistance of simple lithium and lithium complex greases is related to the solubility of the thickener. Lithium hydroxide has limited solubility in water (about 10 percent), and the thickeners based on it also have limited solubility. This provides good resistance to both washing by water and the absorption of water. Although other thickener types (calcium, barium) have better inherent water resistance compared to lithium and lithium complex thickeners, those products have negative aspects that make them less desirable for many applications. In addition, the water resistance properties of simple lithium and lithium complex greases can be enhanced by the addition of polymer additives in small concentrations.

The oil separation properties of a grease relate to both the product’s lubrication ability and storage stability. The grease must release enough oil in the contact zone of the application (bearings, gears), while not releasing so much oil during storage to cause the product to become unusable. If the oil separates excessively during storage, the grease may not be able to be remixed and used.

Original Article:
http://www.machinerylubrication.com/Read/28381/grease-lithium-production-resistance


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