HiTEC® 638 is an ashless dispersant to control low-temperature deposit formation in crankcase lubricants.
HiTEC® 638 is an ashless dispersant for formulating automotive gear oils.
Appearance: Dark brown viscous liquid
Density, lb/gal: 7.70
Specific gravity @ 15.6/15.6°C: 0.924
Viscosity @ 100°C, cSt: 570
Flash point, °C (PMCC): 150 min
Nitrogen, wt%: 2.0
TBN, mg KOH/g: 43
Total amine, meq/g: 0.76
Max handling temp: 125°C (under nitrogen)
Shelf life: 3 months @ 90°C (nitrogen), 24 months @ ambient temperature (sealed drums)
Deposit control
Long field history in many engine oil applications
Carbon, sludge, and deposit formation
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