Lubricating oil composition

Claim 2

A lubricant composition comprising a major amount of an oil of lubricating viscosity and a minor amount of a cosulfurized blend which includes (a) a carboxylic acid ester material and (b) an ester, amide, ester-amide or fatty amine derivative which contains at least one polar substituent group.

Claim 3

A composition according to Claim 1 wherein the ester, amide, and ester-amide derivative according to (b) is derived from an organic acid selected from fatty acids, dialkyl phosphorus acids, thiophosphorus acids, and alkyl­sulfonic acids, the ester derivative according to (b) is derived from an oxyalkylated amine or a polyhydric alco­hol, the amide derivative according to (b) is derived from an oxyalkylated amine or a polyamine, the ester-amide derivative according to (b) is derived from an oxyalky­lated amine and the fatty amine derivative according to (b) is an oxyalkylated amine.

Claim 4

A composition of Claim 1 or 2 which also contains a minor amount of an ashless dispersant.

Claim 5

A composition of Claim 1, 2, or 3 which also contains minor amounts of an overbased alkaline earth metal sulfonate having a total base number of at least 100 and a zinc dihydrocarbyl dithiophosphate.

Claim 6

An additive concentrate adapted for addition to a lubricating oil to provide a formulated lubricating oil suitable for use in the crankcase of an internal combus­tion engine said which contains from 2.0 to 25 percent by weight based on the total weight of concentrate of a cosulfurized blend which includes (a) a carboxylic acid ester material and (b) an ester, amide, ester-amide or fatty amine derivative which contains at least one polar substituent group.

Claim 7

An additive concentrate adapted for addition to a lubricating oil to provide a formulated lubricating oil suitable for use in the crankcase of an internal combus­tion engine said which contains from 2.0 to 25 percent by weight based on the total weight of concentrate of a cosulfurized blend which includes (a) a carboxylic acid ester material and (b) an ester, amide, ester-amide or fatty amine derivative which contains at least one polar substituent group.

Claim 8

The concentrate of Claim 5 which also contains from 40 to 60 percent by weight based on the total weight of concentrate of an ashless dispersant.

Claim 9

The concentrate of Claim 5 or 6 which also contains from 10 to 20 percent by weight based on the total weight of concentration of an overbased alkaline earth metal sulfonate having a total base number of at least 100 and from 10 to 20 percent by weight based on the total weight of concentrate of a zinc dihydrocarbyl dithiophosphate.

Claim 11

A composition comprising a cosulfurized blend of a carboxylic acid ester material and an organic acid ester, amide, or ester-amide derivative which contains at least one polar group and which is selected from the group consisting of: A. a fatty acid amide of a polyamine of the formula: NH₂(CH₂) n -(NH(CH₂) n ) m -NH₂ wherein n = 2 or 3, and m is 0 to 10; B. a fatty acid partial ester of a polyhydric alcohol; C. a phosphoramide, of an oxy- or thio-alkyl phosphorous acid with an oxyalkylated amine or a polyamine; D. an ester of an oxy- or thio-alkyl phosphorous acid with an oxyalkylated amine or a poly­hydric alcohol; E. an ester-amide of an oxy- or thioalkyl phos­phorous acid with an oxyalkylated amine; F. a sulfonamide of an alkylsulfonic acid with an oxyalkylated amine or a polyamine; G. an ester of an alkylsulfonic acid with a polyhydric alcohol; H. a compound of the formula: wherein X is selected from sulfur and oxygen including various combinations thereof; R and R′ are independently selected from hydro­carbyl radicals containing from about 4 to 20 carbons; R˝ and R‴ are divalent aliphatic hydrocarbon radicals containing 1-4 carbon atoms, n is an integer from 0 to 20 and R˝˝ is selected from hydrogen and the group -RO(R‴O) n -H.

Claim 12

A composition comprising a cosulfurized blend of a carboxylic acid ester material and an organic acid ester, amide, or ester-amide derivative which contains at least one polar group and which is selected from the group consisting of: A. a fatty acid amide of a polyamine of the formula: NH₂(CH₂) n -(NH(CH₂) n ) m -NH₂ wherein n = 2 or 3, and m is 0 to 10; B. a fatty acid partial ester of a polyhydric alcohol; C. a phosphoramide, of an oxy- or thio-alkyl phosphorous acid with an oxyalkylated amine or a polyamine; D. an ester of an oxy- or thio-alkyl phosphorous acid with an oxyalkylated amine or a poly­hydric alcohol; E. an ester-amide of an oxy- or thioalkyl phos­phorous acid with an oxyalkylated amine; F. a sulfonamide of an alkylsulfonic acid with an oxyalkylated amine or a polyamine; G. an ester of an alkylsulfonic acid with a polyhydric alcohol; H. a compound of the formula: wherein X is selected from sulfur and oxygen including various combinations thereof; R and R′ are independently selected from hydro­carbyl radicals containing from about 4 to 20 carbons; R˝ and R‴ are divalent aliphatic hydrocarbon radicals containing 1-4 carbon atoms, n is an integer from 0 to 20 and R˝˝ is selected from hydrogen and the group -RO(R‴O) n -H.

Claim 13

A composition comprising a cosulfurized blend of a carboxylic acid ester material and a fatty amine derivative which contains at least one polar group.

Claim 14

A composition comprising a cosulfurized blend of a carboxylic acid ester material and a fatty amine derivative which contains at least one polar group.