Quaternary ammonium salt of ester-lactone and hydrocarbon oil containing same

A quaternary ammonium salt of an ester-gamma-lactone represented by the formula:

• ##STR12## in which R.sup.i and R.sup.iii alternately represent hydrogen and a hydrocarbyl radical having from 50 to 200 carbon atoms, R.sup.ii, and R.sup.iv represent hydrogen or a methyl radical, R is a divalent hydrocarbon radical having from 2 to 6 carbon atoms, X is an anion selected from the group consisting of chloride, bromide, sulfate and borate ions, R.sup.vii is hydrogen or an aliphatic hydrocarbon radical having from 1 to 3 carbon atoms and z has a value from 0 to 2.

A quaternary ammonium salt of an ester-gamma-lactone represented by the formula:

• ##STR13## in which R.sup.i represents a hydrocarbyl radical having from 50 to 200 carbon atoms, R.sup.iii and R.sup.iv represent hydrogen or a methyl radical, R is a divalent hydrocarbon radical having 2 carbon atoms, X is an anion selected from the group consisting of chloride and bromide ions, R.sup.vii is hydrogen or an aliphatic hydrocarbon radical having from 1 to 3 carbon atoms and z has a value from 0 to 2.

A quaternary ammonium salt of an ester-gamma lactone represented by the formula:

• ##STR14## in which R.sup.iii represents a hydrocarbyl radical having from 50 to 200 carbon atoms, R.sup.i and R.sup.ii represent hydrogen or a methyl radical, R is a divalent hydrocarbon radical having 2 carbon atoms, X is an anion selected from the group consisting of chloride and bromide ions, R.sup.vii is hydrogen or an aliphatic hydrocarbon radical having from 1 to 3 carbon atoms and z has a value from 0 to 2.

A lubricating oil composition comprising a major portion of a mineral lubricating oil and a minor dispersant amount of a quaternary ammonium salt of an ester-lactone represented by the formula:

• ##STR15## in which w represents 0 or 1, x and y alternately represent 0 and 1, z has value from 0 to 2, R.sup.i, R.sup.ii, R.sup.iii, R.sup.iv, R.sup.v and R.sup.vi, represent hydrogen, a methyl radical, or a hydrocarbyl radical of 50-200 carbon atoms only one of which is said hydrocarbyl radical, R is a divalent hydrocarbon radical having from 2-10 carbon atoms, R.sup.vii is hydrogen or a hydrocarbyl radical, having from 1 to 3 carbon atoms and X is an anion selected from the group consisting of halide, sulfate, carbonate, sulfite, borate, carboxylate, and phosphate anions.

A lubricating oil composition comprising a major portion of a mineral lubricating oil and a minor dispersant amount of a quaternary ammonium salt of an ester-gamma-lactone represented by the formula:

• ##STR16## in which R.sup.i and R.sup.iii alternately represent hydrogen and a hydrocarbyl radical having from 50 to 200 carbon atoms, R.sup.ii, and R.sup.iv represent hydrogen or a methyl radical, R is a divalent hydrocarbon radical having from 2 to 6 carbon atoms, X is an anion selected from the group consisting of chloride, bromide, sulfate and borate ions, R.sup.vii is hydrogen or an aliphatic hydrocarbon radical having from 1 to 3 carbon atoms and z has a value from 0 to 2.