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US 4,902,438 AGranted
Lubricating oil compositions containing anti-wear/extreme pressure additives
AssigneeBP Chemicals Limited
InventorSean P. O'Connor
Life of this patent
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Abstract
Compounds suitable for use as EP/AW additives in lubricating oil compositions which compounds have the formula: ##STR1## wherein X is independently either a carboxylic acid group, a carboxylic acid ester group, a hydroxyl group or the group YZ wherein Z=X and Y is either an alkylene, aralkylene or cycloalkene group, R.sup.1 is an aliphatic hydrocarbyl group, and R.sup.2 is either hydrogen, a hydrocarbyl group or the group YZ.
Claims11
Compounds suitable for use as EP/AW additives in lubricating oil compositions which compounds have the formula:
- ##STR10## wherein X is independently a carboxylic acid group, a hydroxyl group or the group YZ wherein Z is a carboxylic acid group or a hydroxyl group is an alkylene group,
- R.sup.1 is an alkyl group having at least 6 carbon atoms, and
- R.sub.2 is hydrogen, a methyl, ethyl or propyl group or the group YZ.
Dependencies are inferred from the claim text.