Thiadiazole Technology: -Motor Oil Antiwear -Grease Extreme Pressure
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Transcript of Thiadiazole Technology: -Motor Oil Antiwear -Grease Extreme Pressure
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Thiadiazole Technology: Thiadiazole Technology: -Motor Oil Antiwear-Motor Oil Antiwear-Grease Extreme Pressure-Grease Extreme Pressure
Tom Karol, Ph.D.
Research Director
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1,3,4-Thiadiazole Chemistry1,3,4-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
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Theory of Thiadiazoles as Theory of Thiadiazoles as EP additivesEP additives
Theory of simple thiadiazole coordination
Theory of dimer thiadiazole complexation
Theory of poly thiadiazole coordination
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Simple Thiadiazole CoordinationSimple Thiadiazole Coordination
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SEQUENCE VD WEAR RESULTSSEQUENCE VD WEAR RESULTSconducted in the same prototype conducted in the same prototype motor oil base formulationmotor oil base formulation ____Wear____
Max. Avg. 0.08P ZnDTP fail fail 0.09P ZnDTP pass pass
0.1% thiadiazole technology plus 0.08P ZnDTP 0.0040 0.0029Sequence VD limits 0.0080 0.0040
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Dimer Thiadiazole ComplexationDimer Thiadiazole Complexation
Bidentate Coordination
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Theory of Poly-Thiadiazole Theory of Poly-Thiadiazole CoordinationCoordinationPolydentate association
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Introduction ofIntroduction of VANLUBE 972 VANLUBE 972
-Achieves polydentate -Achieves polydentate propertiesproperties through poly-through poly-thiadiazole coordinationthiadiazole coordination
-Useful as a Grease Extreme -Useful as a Grease Extreme PressurePressure additiveadditive
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2,5-Dimercapto-1,3,4-2,5-Dimercapto-1,3,4-Thiadiazole Disulfide DimerThiadiazole Disulfide Dimer
SS
NN
S S SS
NNH H
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VANLUBE 972 VANLUBE 972 Metal CoordinationMetal CoordinationPolydentate association
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IR ABSORPTIONIR ABSORPTION
Major shifts in peaks are further evidence for the complex formation:
Compound Absorption Peaks (cm-1)DMTD disulfide bis-dimer1487, 1435, 1406, 1262, 1212Triethylene glycol monobutyl ether
1460, 1351, 1297, 1248Complex, 40% monosulfide bis-dimer1510, 1433, 1350, 1244
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SATURATION POINTSATURATION POINT
SOLVENT % DIMERTHF 16.6
Acetone 2.4
Acetonitrile <0.04
Triethylene Glycol Monobutyl Ether 48
Triethylene Glycol Dimethyl Ether 56
Polyethylene Glycol (MW 400) 45
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Modified ASTM D 4048 Cu Corrosion Modified ASTM D 4048 Cu Corrosion
24h @ 100°CVANLUBE 972
mass percent1 2 3 5
Li-12 OH Grease 99 98 97 95Heptane and towel rub
Wt Change, mg +5.8 +8.4 +14.8 +22.1
DMK Towel Rubbing,
Wt Change, mg +1.9 +0.1 +1.6 +5.8
Rating 2e 2e 2e 2e
DMK = dimethylketone (acetone)
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Effect of VANLUBE 972Effect of VANLUBE 972
VANLUBE 972 1%Molybdenum Dithiophosphate, mass 1% 1%Li-12OH Stearate Grease, mass 99% 98%Copper Strip Weight Before, g 25.4175 27.0688
Weight Change, mg -2.1 +4.0Heptane & Paper Towel,
Weight Change, mg-2.8 +4.2
Acetone & Paper Towel,
Weight Change, mg-3.1 +3.2
Rating, ASTM D 4048 4a 2e
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Modified ASTM D 4048 Modified ASTM D 4048 Copper Corrosion TestCopper Corrosion Testmass percent
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VANLUBE 972 and VANLUBE 972 and
Fe Corrosion InhibitorsFe Corrosion Inhibitors Grease VL 972
Mass %Timken, lb 4- Ball
Weld,kgf 4-Ball Wear,
mm
Aluminum Complex #2 0.00 - -
1.00 40 - 0.50, 0.49, 0.43
1.25 Failed 50 - -
1.50 Failed 50 - -
1.75 60 315 0.96, 0.71, 0.73
2.00 80 - -
Aluminum Complex #2 With 0.5% OD-9316
1.00 Failed 50 315 0.60, 0.67
1.75 60 - 0.60, 0.67
Aluminum Complex #2 With 1.0% OD-9316
1.00 50 250 0.63, 0.67
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Biodegradation Biodegradation Study of VANLUBE 972:Study of VANLUBE 972:
CO2 + Ba(OH)2
BaCO3+ H2O
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Biodegradation Study of Biodegradation Study of
VANLUBE 972:VANLUBE 972:
Material Mass (mg) % Degradation
VANLUBE 972 18.2 78.0
23.1 46.5
Sodium Benzoate 36.0 78.4
Canola Oil 30.1 38.5