Lubricant oil and lubricating oil additive concentrate...

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 141/12 (2006.01) C10M 129/14 (2006.01) C10M 133/12 (2006.01) C10M 139/00 (2006.01)

Patent

CA 2636814

A lubricant oil composition having a synergistic oxidative stability is disclosed, the composition comprising at least one hindered phenolic antioxidant, at least one mono-boronated hindered phenolic antioxidant, at least one di-boronated hindered phenolic antioxidant, and at least one alkylated diphenylamine. The invention also provides a lubricating oil additive concentrate composition that imparts synergistic oxidative stability to a lubricant oil upon its addition, the concentrate composition comprising at least one hindered phenolic antioxidant, at least one mono-boronated hindered phenolic antioxidant, at least one di-boronated hindered phenolic antioxidant, and at least one alkylated diphenylamine. Further, the concentrate compositions of the present invention may also be prepared with a high concentration of hindered phenolic antioxidants without deleterious effects on viscosity or lubricant solubility.

La présente invention concerne une composition d~huile lubrifiante présentant une stabilité par oxydation synergique, la composition comprenant au moins un antioxydant phénolique entravé, au moins un antioxydant phénolique entravé mono-boré, au moins un antioxydant phénolique entravé di-boré et au moins un diphénylamine alkylé. La présente invention concerne également une composition de concentré d~additif d~huile lubrifiante qui confère une stabilité par oxydation synergique à une huile lubrifiante lors de son addition, la composition de concentré comprenant au moins un antioxydant phénolique entravé, au moins un antioxydant phénolique entravé mono-boré, au moins un antioxydant phénolique entravé di-boré et au moins un diphénylamine alkylé. En outre, les compositions de concentré selon la présente invention peuvent également être préparées avec une concentration élevée d~antioxydants phénoliques entravés sans effets nuisibles à la viscosité ou à la solubilité du lubrifiant.

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