Lubricating oil containing a boron compound and corrosion inhibitors
AssigneeUnion Oil Company of California
InventorsRichard A. Holstedt, Peter Jessup
Life of this patent
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Abstract
Lubricating compositions containing copper and lead corrosion inhibitors and boron and/or metal-boron derivatives having extreme pressure, anti-wear and friction reducing properties are disclosed.
Claims24
A lubricating composition comprising a major amount of a lubricating oil and a minor amount of:
- (A) An extreme pressure anti-wear and friction reducing boron compound of the formula:
- ##STR6## wherein R.sup.1 is hydrogen, alkyl, cyclic, alicyclic, aryl, alkylaryl, or arylalkyl radicals having from 1 to about 24 carbon atoms, R.sup.2 and R.sup.3 are the same or different, straight or branched carbon chains, cyclic, alicyclic, aryl, alkylaryl or arylalkyl radicals having from 2 to about 20 carbon atoms, y is a number from 1 to 4, and X is either hydrogen, a transition metal having an atomic number between 21 and 30 or a Group IVA metal of the Periodic Table and mixtures thereof;
- (B) A copper corrosion inhibitor comprising a hydrocarbon polysulfide derivative of 2,5-dimercapto-1,3,4-thiadiazole having the formula ##STR7## wherein R.sup.4 and R.sup.5 are straight or branched chain alkyl, cyclic, alicyclic, aryl, alkylaryl or arylalkyl radicals having from 2 to about 30 carbon atoms and w and z are numbers from 1 to about 8;
- and
- (C) a lead corrosion inhibitor comprising terephthalic acid.
A lubricating composition comprising a major amount of a lubricating oil and a minor amount of:
- (A) An extreme pressure, anti-wear and friction reducing boron compound selected from methylaminodiethylate hydrogen borate, ethylaminodiethylate hydrogen borate, propylaminodiethylate hydrogen borate, butylaminodiethylate hydrogen borate, octadecylaminodiethylate hydrogen borate, dodecylaminodiethylate hydrogen borate, cyclohexylaminodiethylate hydrogen borate, phenylaminodiethylate hydrogen borate, oleylaminodiethylate hydrogen borate, cocoaminodiethylate hydrogen borate, tallowaminodiethylate hydrogen borate, or dodecyl di(phenyl ethylate) hydrogen borate or a mixture thereof;
- (B) A copper corrosion inhibitor comprising a hydrocarbon polysulfide derivative of 2,5-dimercapto-1,3,4-thiadiazole selected from 1,3,4-thiaidazole-2,5-bis (octyldisulfide);
- 1,3,4-thiadiazole-2,5 bis(octytrisulfide);
- 1,3,4-thiadiazole-2,5 bis (octyltetrasulfide);
- 1,3,4-thiadiazole-2,5 bis (dodecyldisulfide);
- 1,3,4-thiadiazole-2,5 bis (dodecyltrisulfide);
- 1,3,4-thiadiazole -2,5 bis (dodecyltetrasulfide;
- 2-lauryldithia-5-thiaalpha-methylstyryl-1,3,4 thiadiazole or 2-lauryltrithia-5-thiaalpha-methylstyryl-1,3,4 thiadiazole or a mixture thereof;
- (C) A lead corrosion inhibitor comprising terephthalic acid.
A lubricating composition comprising a major amount of a lubricating oil and a minor amount of:
- (A) from about 0.5 to about 10 weight percent of an extreme pressure, anti-wear and friction reducing boron compound selected from methylaminodiethylate hydrogen borate, phenylaminodiethylate hydrogen borate, octadecylaminodiethylate hydrogen borate, cocoaminodiethylate hydrogen borate, tallowaminodiethylate hydrogen borate, or dodecylamino di(phenylethylate) hydrogen borate or a mixture thereof;
- (B) from about 0.005 to about 2.5 weight percent of a copper corrosion inhibitor selected from the group consisting of 1,3,4-thiadiazole-2,5-bis (octyldisulfide);
- 1,3,4-thiadiazole-2,5 bis(octytrisulfide);
- 1,3,4-thiadiazole-2,5 bis (octyltetrasulfide);
- 1,3,4-thiadiazole-2,5 bis (dodecyldisulfide);
- and 1,3,4-thiadiazole-2,5 bis (dodecyltrisulfide), and mixtures thereof;
- (C) from about 0.01 to about 0.05 weight percent of a lead corrosion inhibitor comprising terephthalic acid.
A lubricating composition comprising a major amount of a lubricating oil and from about 0.5 to about 10 weight percent of cocoamindiethylate hydrogen borate, from about 0.005 to about 2.5 weight percent of 1,3,4-thiadiaozole-2,5-bis (octyldisulfide), and from about 0.001 to about 1 weight percent of terephthalic acid.
A lubricating composition comprising a major amount of a lubricating oil and from about 0.5 to about 10 weight percent of dodecylamino di(phenyl ethylate) hydrogen borate, from about 0.005 to about 2.5 weight percent of 1,3,4-thiadiazole-2,5-bis (octyldisulfide), and from about 0.001 to about 1 weight percent of terephthalic acid.
Dependencies are inferred from the claim text.