Biodegradable lubricant composition from triglycerides and...

C - Chemistry – Metallurgy – 10 – M

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C10M 169/04 (2006.01) C10M 101/04 (2006.01) C10M 105/38 (2006.01)

Patent

CA 2254125

A lubricant composition is disclosed which comprises a triglyceride oil lubricant and an oil soluble copper compound antioxidant. The oil soluble copper compounds are particularly effective antioxidants for triglycerides. The lubricant composition can include soluble zinc compounds which reduce wear and/or soluble antimony compounds which reduce wear and can function as adjuvant antioxidants reducing the amount of oil soluble copper required. Preferred zinc and antimony compounds are zinc dithiophosphate antiwear/antioxidant, and antimony dialkyldithiocarbamate antioxidant adjuvant.

Cette invention concerne une composition lubrifiante constituée d'un triglycéride lubrifiant et d'un composé de cuivre soluble à l'huile antioxydant. Les composés de cuivre solubles à l'huile sont des antioxydants particulièrement efficaces pour les triglycérides. La composition lubrifiante peut comprendre des composés de zinc solubles résistants à l'usure et/ou des composés d'antimoine solubles résistants à l'usure qu'on peut utiliser comme adjuvants antioxydants, ce qui permet de diminuer la quantité requise de cuivre soluble à l'huile. Des composés de zinc et d'antimoine préférés sont un dithiophosphate de zinc (antiusure/antioxydant) et un dialkyldithiocarbamate d'antimoine (adjuvant antioxydant).

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