Additive for lubricant compositions comprising a sulfur-containing and a sulfur-free organomolybdenum compound, and a triazole or a derivatized triazole
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United States of America Patent
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Sep 19, 2017
Grant Date -
Feb 16, 2017
app pub date -
Aug 2, 2016
filing date -
Aug 14, 2015
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Abstract
A lubricating composition for use in heavy duty diesel engines which is formulated to allow the use of organomolybdenum compounds but which overcomes the issue of Cu and/or Pb corrosion. The lubricant is characterized by having a synergistic additive composition comprising (A) a sulfur-free organo-molybdenum compound, (B) a sulfur-containing organo-molybdenum compound and (C) a triazole derivative prepared by reacting 1,2,4-triazole, a formaldehyde source and an amine; (A), (B) and (C) being present in an amount sufficient to allow the lubricating composition to pass the High Temperature Corrosion Bench Test ASTM D 6594 with respect to Cu and/or Pb corrosion.
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