Biodegradable lubricant composition from triglycerides and oil soluble copper
AssigneeRenewable Lubricants, Inc.
InventorWilliam W. Garmier
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Abstract
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.
Claims24
A lubricant composition comprising;
- a) a lubricant including at least 20 volume percent based on the volume of said lubricant composition of at least one vegetable oil triglyceride of the formula ##STR10## wherein R.sup.1, R.sup.2 and R.sup.3 are independently, aliphatic hydrocarbyl groups of from 7 to 23 carbon atoms, said hydrocarbyl groups of said at least one triglyceride being at least 20 mole % monounsaturated, and
- b) from about 50 to about 3000 ppm of copper based upon the weight of the lubricant composition, said copper being in an oil soluble form.
A lubricating oil composition being derived from blending in any order components comprising:
- a) a lubricant including at least 20 volume percent based on the volume of said lubricating oil composition of at least one vegetable oil triglyceride of the formula ##STR11## wherein R.sup.1, R.sup.2 and R.sup.3 are independently, aliphatic hydrocarbyl groups of from 7 to 23 carbon atoms, said hydrocarbyl groups of said at least one triglyceride being at least 20 mole % monounsaturated, and
- b) from about 50 to about 3000 ppm of copper based upon the weight of the lubricant composition, said copper being in an oil soluble form.
Dependencies are inferred from the claim text.