Polycarboxylic acid esters and lubricants containing these esters
AssigneeBASF SE
InventorsHelmut Mach, Hans-Henning Vogel, Juergen Jahn
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Abstract
This invention relates to aliphatic or aromatic polycarboxylic acid esters as defined herein which are useful as base oils alone in lubricating oil compositions or in admixture with completely synthetic, partially synthetic, or mineral oil-based lubricant compositions.
Claims6
A lubricant composition base oil consisting essentially of at least one aliphatic or aromatic polycarboxylic acid ester having the general formula:
- ##STR4## wherein X is a straight or branched chain alkylene radical having the formula:
- ##STR5## where R.sup.1 and R.sup.2 are, independently, hydrogen or C.sub.1 -C.sub.5 alkyl, and n is from 2 to 12;
- or an aryl radical having the formula:
- ##STR6## R is a 9 or 13 carbon atom radical afforded by the oxo reaction of predominately linear n-butene oligomer having a degree of oligomerization of 2 or 3;
- and y is 1 or 2.
A lubricating oil composition comprising completely synthetic, partially synthetic or mineral oil as a base oil which includes in admixture at least one of an aliphatic or aromatic polycarboxylic acid ester having the formula:
- ##STR8## wherein X is a straight or branched chain alkylene radical having the formula:
- ##STR9## where r.sup.1 and R.sup.2 are, independently, hydrogen or C.sub.1 -C.sub.5 alkyl, and n is from 2 to 12;
- or
- an aryl radical having the formula ##STR10## R is a 9 or 13 carbon atom radical afforded by the oxo reaction of predominately linear n-butene oligomer having a degree of oligomerization of 2 or 3;
- and y is 1 or 2.
Dependencies are inferred from the claim text.