Boron amide lubricating oil additive

Claim 1

An oil-soluble nitrogen and boron-containing lubricant additive prepared by mixing a chlorinated aliphatic hydrocarbon having an average molecular weight ranging from about 750 to 2500 chlorinated to from about 0.75 to 10 weight percent chlorine with an alkylene polyamine, represented by the formula: ##STR3## in which R is divalent ethylene, propylene or polymethylene radical, provided that when R is polymethylene, R represents from 2 to 6 methylene groups, and y is an integer from 1 to 10, in the proportion of from about 1 to 5 moles of said alkylene polyamine per gram atom of chlorine contained in said chlorinated hydrocarbon, and reacting said mixture at a temperature in the range from about 250° to 400° F. in the presence of a hydrogen chloride acceptor to form a nitrogen-containing reaction product, and reacting said nitrogen-containing reaction product with a boron-containing compound selected from the group consisting of boron oxide, boron oxide hydrate, boron triflouride, boron tribromide, boron trichloride and boric acid, in the proportion of from about 0.20 to 1.5 moles of said boron-containing compound per mole of said nitrogen-containing reaction product at a temperature in the range from about 200° to 350° F. to produce a nitrogen-and boron-containing additive characterized by containing from about 0.5 to 2.5 weight percent nitrogen and from about 0.050 to 2.0 weight percent boron.