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Thiadiazole Technology: -Motor Oil Antiwear -Grease Extreme Pressure Tom Karol, Ph.D. Research Director.

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Presentation on theme: "Thiadiazole Technology: -Motor Oil Antiwear -Grease Extreme Pressure Tom Karol, Ph.D. Research Director."— Presentation transcript:

1 Thiadiazole Technology: -Motor Oil Antiwear -Grease Extreme Pressure Tom Karol, Ph.D. Research Director

2 1,3,4-Thiadiazole Chemistry –Physical /Performance Properties Liquid Wear/EP performance equivalent to or better than heavy metal technology Environmentally friendly wear/EP agent Ashless Biodegradable preferred Cost effective – Commercially viable process

3 Theory of Thiadiazoles as EP additives Theory of simple thiadiazole coordination Theory of dimer thiadiazole complexation Theory of poly thiadiazole coordination

4 Simple Thiadiazole Coordination

5 SEQUENCE VD WEAR RESULTS conducted in the same prototype motor oil base formulation ____Wear____ Max. Avg. 0.08P ZnDTP fail fail 0.09P ZnDTP pass pass 0.1% thiadiazole technology plus 0.08P ZnDTP Sequence VD limits

6 Dimer Thiadiazole Complexation Bidentate Coordination

7 Theory of Poly-Thiadiazole Coordination Polydentate association

8 Introduction of VANLUBE 972 -Achieves polydentate propertiesthrough poly- thiadiazole coordination -Useful as a Grease Extreme Pressure additive

9 2,5-Dimercapto-1,3,4- Thiadiazole Disulfide Dimer

10 VANLUBE 972 Metal Coordination Polydentate association

11 IR ABSORPTION Major shifts in peaks are further evidence for the complex formation: Compound Absorption Peaks (cm -1 ) DMTD disulfide bis-dimer 1487, 1435, 1406, 1262, 1212 Triethylene glycol monobutyl ether 1460, 1351, 1297, 1248 Complex, 40% monosulfide bis-dimer 1510, 1433, 1350, 1244

12 SATURATION POINT SOLVENT % DIMER THF 16.6 Acetone 2.4 Acetonitrile <0.04 Triethylene Glycol Monobutyl Ether 48 Triethylene Glycol Dimethyl Ether 56 Polyethylene Glycol (MW 400) 45

13 Modified ASTM D 4048 Cu Corrosion 100°C VANLUBE 972 mass percent 1235 Li-12 OH Grease Heptane and towel rub Wt Change, mg DMK Towel Rubbing, Wt Change, mg Rating2e DMK = dimethylketone (acetone)

14 Effect of VANLUBE 972 VANLUBE 972 1% Molybdenum Dithiophosphate, mass 1% Li-12OH Stearate Grease, mass 99%98% Copper Strip Weight Before, g Weight Change, mg Heptane & Paper Towel, Weight Change, mg Acetone & Paper Towel, Weight Change, mg Rating, ASTM D a2e

15 Modified ASTM D 4048 Copper Corrosion Test mass percent

16 VANLUBE 972 and Fe Corrosion Inhibitors Grease VL 972 Mass % Timken, lb 4- Ball Weld,kgf 4-Ball Wear, mm Aluminum Complex # , 0.49, Failed Failed , 0.71, Aluminum Complex #2 With 0.5% OD Failed , , 0.67 Aluminum Complex #2 With 1.0% OD , 0.67

17 Biodegradation Study of VANLUBE 972:

18 MaterialMass (mg) % Degradation VANLUBE Sodium Benzoate Canola Oil


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