Polymeric surfactant compound
AssigneeThe Lubrizol Corporation
InventorsJames D. Burrington, James S. Puckace, Alexander Sammut, Greg Garwood
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Abstract
The instant disclosure relates to a lubricant composition having an oil of lubricating viscosity, a polymeric surfactant compound that is an acylated polymer having a number average molecular weight of about 500 to about 50,000 where the polymer comprises a branched olefin having from 8 to 30 carbon atoms. The acylated polymer can further be reacted with an amine or alcohol to form an amide, imide, ester or combinations thereof. The present disclosure further relates to lubricant compositions that exhibit good dispersancy and viscometric performance.
Claims26
A lubricating oil composition comprising:
- a. an oil of lubricating viscosity, and
- b. from 0.1 to 20 wt. % of a polymeric surfactant compound comprising a polymer represented by the formula -[T]n-[Z]m—, wherein T is a branched olefin containing 5 to 30 carbon atoms, Z is a vinyl monomer capable of polymerizing with the branched olefin, m is 0 to 100 and n is at least 1 when m=0 and wherein c carboxylic acid functionality is grafted onto the polymer to form the acylated polymer, and the polymer has a number average molecular weight (Mn) of 500 to 50,000 Da, wherein the branched olefin is a trimer of isoprene represented one of the following formulas;
- (2E,5B,7E,10E) 3,6,10-trimethyldodeca-2,5,7,10-tetraene, or
- (3E,7E,10E)-2,7,10-trimethyldodeca-1,3,7,10-tetraene, or
- (E)-2,9-dimethyl-5-(prop-1-en-2-yl)deca-1,3,8-triene, or
- (3E,6E,10E)-2,6,10-trimethyldodeca-1,3,6,10-tretraene, of
- (E)-7,11-dimethyl-3-methylenedodeca-1,6,10-triene.
A lubricating oil composition comprising:
- a. an oil of lubricating viscosity, and
- b. from 0.1 to 20 wt. % of a polymeric surfactant compound comprising a polymer represented by the formula -[T]n-[Z]m—, wherein T is a branched olefin containing 5 to 30 carbon atoms, Z is a vinyl monomer capable of polymerizing with the branched olefin, m is 0 to 100 and n is at least 1 when m=0 and wherein the polymer reacted with an ethylenically unsaturated carboxylic acid to form the acylated polymer, and the polymer has a number average molecular weight (Mn) of 500 to 50,000 Da, wherein the branched olefin can be tetramers of the following formula:
- (6E,10E)-7,11,15-trimethyl-3-methylenehexadeca-1,6,10,14-tetraene, or
- (3E,10E,14E)-3,7,11,15-tetramethylhexadeca-1,3,6,10,14-pentaene, or
- (6E,10E,14E)-7,11,14-trimethyl-3-methylenehexadeca-1,6,10,14-tetraene, or
- (6E,9E,13E)-2,10,13-trimethyl-6-(prop-1-en-2-yl)pentadeca-1,3,9,13-tetraene.
Dependencies are inferred from the claim text.