초록

Friction of internal combustion engines is reduced by adding to the lubricating oil or fuel used in such engine a minor amount of a friction-reducing additive. The additive is the reaction product of a N-alkanol hydrocarbylamide such as N-ethanol oleamide with a boron compound such as boric acid.

대표청구항 ▼

A friction-reducing additive effective in reducing friction in internal combustion engines, said additive comprising the product obtained by the process comprising reacting a N-alkanol hydrocarbylamide having the structure: R1－CO－NR2－R3－OH wherein R1 is an aliphatic hydrocarbon group containing abou

A friction-reducing additive effective in reducing friction in internal combustion engines, said additive comprising the product obtained by the process comprising reacting a N-alkanol hydrocarbylamide having the structure: R1－CO－NR2－R3－OH wherein R1 is an aliphatic hydrocarbon group containing about 12-36 carbon atoms, R2 is selected from the group consisting of hydrogen and lower alkyl and R3 is a divalent hydrocarbon group containing 2 carbon atoms, with a boron compound selected from the group consisting of boric acid, esters of boric acid and mixtures of boric acid and alcohol wherein said alcohols are selected from the group consisting of monohydroxy alcohols containing 1 to about 20 carbon atoms, polyhydroxy alcohols containing 2 to about 6 carbon atoms and 2 to about 6 hydroxy groups and polyalkylene glycol containing 2 to about 10 alkyleneoxy groups. Lubricating oil suitable for use in the crankcase of internal combustion engines containing a friction-reducing amount of an oil-soluble product obtained by the process comprising reacting a N-alkanol hydrocarbylamide having the structure: R1－CO－NR2－R3－OH wherein R1 is an aliphatic hydrocarbon group containing about 12-36 carbon atoms, R2 is selected from the group consisting of hydrogen and lower alkyl and R3 is a divalent hydrocarbon group containing 2 carbon atoms, with a boron compound selected from the group consisting of boric acid, esters of boric acid and mixtures of boric acid and alcohol wherein said alcohols are selected from the group consisting of monohydroxy alcohols containing 1 to about 20 carbon atoms, polyhydroxy alcohols containing 2 to about 6 carbon atoms and 2 to about 6 hydroxy groups and polyalkylene glycol containing 2 to about 10 alkyleneoxy groups. A lubricating oil composition of claim 5 further containing a minor amount sufficient to further reduce friction of a di-C1-4 alkyl C12-36 hydrocarbylphosphonate.