Abstract: The present invention provides a novel unsulfurized, carboxylate-containing additive for lubricating oils, comprising a mixture of alkaline earth metal salts (hydrocarbyl phenate/hydrocarbyl salicylate) and a reduced amount of unreacted hydrocarbyl phenols, as well as additive packages, concentrates and finished oil compositions comprising the same. Specifically, it relates to additives comprising said mixture in which said hydrocarbyl salicylate is primarily single-aromatic-ring hydrocarbyl salicylate. The invention also provides a method for producing said additive.
Type:
Grant
Filed:
May 22, 2003
Date of Patent:
January 16, 2007
Assignees:
Chevron Oronite Company LLC, Cherov Oronite Technology B.V.
Inventors:
Cornelius Hendrikus Boons, Eugene Spala, Willem Van Dam