Patents Assigned to R.T. Vanderbilt Co., Inc.
  • Combination of phosphate based additives and sulfonate salts for hydraulic fluids and lubricating compositions
    Patent number: 6046144
    Abstract: Disclosed are synergistic antioxidant compositions composed of (1) amine salts of alkyl phosphates and (2) ethylenediamine, ammonium or metal salts of alkylarylsulfonates.The antioxidant compositions are useful for formulating zinc-free antiwear hydraulic fluids and gear lubricating oils in conjunction with thiophosphate type antiwear agents, corrosion and rust inhibitors.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: April 4, 2000
    Assignee: R.T. Vanderbilt Co., Inc.
    Inventors: Thomas J. Karol, Steven G. Donnelly, Brian W. Stunkel
  • Synergistic organomolybdenum compositions and lubricating compositions containing same
    Patent number: 6017858
    Abstract: This invention relates to synergistic antiwear compositions comprising an organomolybdenum complex and an organic sulfuir compound selected from 2,5-dimercapto-1, 3,4-thiadiazole derivatives, bisdithiocarbamate esters, metal dithiocarbamates, metal phosphorodithioates and phosphorodithioate esters. The organomolybdenum complex is a reaction product prepared by reacting 1 mole fatty oil, 1.0 to 2.5 moles diethanolamine and a molybdenum source.Lubricating compositions containing the synergistic compositions possess good antiwear properties and improved oxidation stability.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: January 25, 2000
    Assignee: R.T. Vanderbilt Co., Inc.
    Inventors: Thomas J. Karol, Steven G. Donnelly