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.
Claims4
A lubricating oil additive consisting of:
- a lubricant base oil, (A) a salicylate detergent and (B) a metal detergent other than any salicylate detergent, wherein the salicylate detergent (A) is a (per) basic salt of an alkali metal or alkaline earth metal salicylate represented by the general formula (1):
- wherein one of R1 and R2 in the general formula (1) is a hydrocarbon which has 10 to 40 carbon atoms, and the other is a hydrocarbon which has less than 10 carbon atoms, M represents an alkali metal or alkaline earth metal, and n is 1 or 2 in accordance with the valence of the metal,
- the component (A) has a metal ratio of 2.3 or more and 6 or less, and component (B) is at least one selected from alkali metal or alkaline earth metal sulfonates and (per)basic salts thereof which has a metal ratio of 1 or more and 20 or less.
A lubricating oil additive consisting of:
- a lubricant base oil, (A) a salicylate detergent and (B) a metal detergent other than any salicylate detergent, wherein the salicylate detergent (A) is a (per) basic salt of an alkali metal or alkaline earth metal salicylate represented by the general formula (1):
- wherein R1 and R2 in the general formula (1) are each a hydrocarbon group having 10 to 40 carbon carbon atoms, M represents an alkali metal or alkaline earth metal, and n is 1 or 2 in accordance with the valence of the metal,
- the component (A) has a metal ratio of 2.3 or more and 6 or less, and component (B) is at least one selected from alkali metal or alkaline earth metal sulfonates and (per)basic salts thereof which has a metal ratio of 1 or more and 20 or less.
Dependencies are inferred from the claim text.