Lubricating oil additive and lubricating oil composition
AssigneeNippon Oil Co., Ltd.
InventorKazuhiro Yagishita
Life of this patent
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Abstract
A lubricating oil additive and a lubricating oil composition wherein no precipitation is generated to exhibit a good storage stability even if a combination of a salicylate detergent and another metal detergent is used is provided by rendering the additive and composition an additive and a composition obtained by incorporating, into a lubricant base oil, (A) an alkali metal or alkaline earth metal salicylate having at its 3 and 5-positions hydrocarbon groups having 1 to 40 carbon atoms and a (per)basic salt, and (B) a metal detergent other than any salicylate detergent.
Claims8
A lubricating oil additive obtained by incorporating, into a lubricant base oil, (A) a salicylate detergent and (B) a metal detergent other than any salicylate detergent, wherein the salicylate detergent (A) is an alkali metal or alkaline earth metal salicylate represented by the general formula (1) and/or a (per)basic salt thereof:
- wherein R1 and R2 may be the same or different and each represent a hydrocarbon group having 1 to 40 carbon atoms, the hydrocarbon group may contain oxygen or nitrogen, m represents an alkali metal or alkaline earth metal, and n is 1 or 2 in accordance with the valence of the metal.
Dependencies are inferred from the claim text.