TITANIUM DITHIOPHOSPHATES - A NEW CLASS OF MULTIFUNCTIONAL LUBRICANT ADDITIVES

Three oil-soluble triisopropoxytitanium dialkylphosphorodithioates and an oil-insoluble diisopropoxytitanium alkylenephosphorodithioate were synthesized in nearly quantitative yields. These titanium complexes w ere evaluated for their antifriction, extreme pressure, antiwear and a ntioxidant properties in lubricating base oils and greases. The result s show that a 0.5% w/w level, these complexes reduce the coefficient o f friction by 20 to 25 percent, increase weld load by 45 to 110 percen t, decrease metallic wear by 25 to 45 percent and considerably improve resistance of oil towards oxidation. The performance of these newly d eveloped multifunctional additives has been compared with commercially established additives like molybdenum dithiophosphates and zinc dithi ophosphates.