Aluminum complex grease

Aluminum complex greases, obtained by the reaction of aluminum isopropylate with a mixture of benzoic acid and fatty acids. These greases have a remarkable resistance to water, very good adhesion to metallic surfaces, good mechanical stability properties and resistance to temperature. They are less common than the first two types. 

Negative effects on stress-cracking behavior can also be caused by grease thickeners, such as metallic soaps based on lithium, sodium stearate, or lithium-12-hydroxystearate and lithium, barium, or aluminum complex soaps [965]. 

Commonly used repeUents for leather are sUicones, chrome complexes of long chain fatty acids, and fluorochemicals. Fluorochemical repeUents also provide repeUency to oUs and greases so that the treated leather resists staining. A water repeUent may also be a hydrophobic chemical insolubUized in the leather. A simple water-repeUent treatment consists of forming an aluminum soap in leather by the two-step process of applying a soap, and then an aluminum salt. 

Calcium, magnesium and aluminum salts of fatty acids, insoluble in water but soluble in hydrocarbons, are used as components of lubricant oils and greases containing oil as the dispersion medium. The derivatives of more complex organic acids, such as cholic acid found in bile, humic acids present in soils, etc., play an important role in nature... 

Stabilization of silica-thickened grease with basic aluminum stearate probably - involves adsorption of the aluminum on the silica with the fatty add anions attached (503). Silica fillers for elastomers are improved by rendering the surface organophilic with basic chromium complexes of the type... 

---