Aluminum Complex Soaps as Thickeners for Multi-Purpose Grease

摘要

Aluminum complex soaps were evaluated as potential thickeners for greases which would meet the low temperature requirements and exceed the upper temperature limitations of Military Specification Mil-G-10924B Grease, Automotive and Artillery. The reaction of aluminum isopropylate with mixtures of fatty acids and other organic acids in a mutual solvent is the preferred method of forming these complexes,. Of the 17 different lower molecular weight organic acids complexed with an aluminum soap, an aluminum benzoate-soap complex showed the best thickening efficiency and highest dropping point. The effects of benzoate to soap ratios, preformed complex vs in situ preparations, solvent effects on in situ preparations and additive, thickener concentration and dispersion effects were evaluated on aluminum benzoate-soap complex greases. (Author)