Patent GB-914774-A (GB)
Title: Metal working lubricant compositions
Inventor: SUDHOLZ LOUIS HENRY
IPC: C10M173/00
Filed: 1960-02-18
Abstract: A method of working metals employs a metal working lubricant having a mineral oil base containing, in an amount sufficient to improve the metal working properties thereof, an oil-soluble phosphorus-, sulphur- and metal-containing oxidized hydrocarbon reaction product produced by the method which comprises the steps of (1) forming a mixture comprising (a) a hydrocarbon having a molecular weight of from about 200 to about 1,000 selected from aliphatic hydrocarbons and aromatic hydrocarbons having at least one nuclear hydrogen atom substituted by an aliphatic radical to provide a total of at least 8 aliphatic carbon atoms per molecule therein and mixtures thereof, and (b) from 0,5% to 25% based on the weight of said hydrocarbon, of a metal oxide or metal hydroxide the metal constituent of which is selected from Groups I and II of Mendel<\>aeeff's Periodic Table of the Elements; (2) contacting said mixture with a gas containing free oxygen at a temperature of from 125 DEG C. to 325 DEG C. to effect oxidation of said hydrocarbon and reaction of said metal oxide or hydroxide with the oxidized hydrocarbon; (3) continuing the oxidation for a time sufficient to incorporate from 0,05% to 3,0% by weight of metal into the oxidized hydrocarbon; (4) reacting the product from step 3 with from 5% to 20% by weight based on the weight of hydrocarbon charged in step 1 of a phosphorus sulphide at a temperature of from 75 DEG C. to 150 DEG C. to form a phosphorus-, sulphur- and metal-containing product; (5) providing a mixture of the reaction product from step 4 with from about 2% to about 25% by weight based on the hydrocarbon charged in step 1 of a metal oxide, hydroxide, carbonate or chloride the metal constituent of which is selected from Groups I and II of Mendel<\>aeeff's Periodic Table of the Elements and water at a temperature below the boiling point of water; (6) substantially completely dehydrating the mixture formed in step 5; and (7) subjecting the dehydrated mixture to filtration to remove insolubles therefrom.  In an example a mixture of bright stock and hydrated lime was heated and air was passed therethrough.  The product was mixed with further oil and reacted with phosphorous pentasulphide in an atmosphere of nitrogen.  The product was then treated with water and a further quantity of hydrated lime and then dehydrated and filtered.  The product may be included in cutting oils or soluble oils.  Other constituents of the compositions may include extreme pressure agents such as sulphurized animal, marine and vegetable oils, dibenzyl disulphide, chlornaphthaxanthate, chlorinated fatty materials such as chlorinated stearic acids, chlorinated waxes and organic phosphorus compounds such as thiophosphates. Emulsifying agents which may be used include sodium and potassium salts of animal and vegetable fats and fatty acids such as oleic, stearic and the like; mineral oil sulphonates prepared from a variety of mineral oil fractions; glyoxalidines such as 1-hydroxy-ethyl-2-heptadecenyl glyoxalidine; hexahydric alcohol partial esters of high molecular weight fatty acids and the anhydrides thereof, such as sorbitan monooleate; polyoxyethylene derivatives of the above-mentioned hexahydric alcohol partial esters; and alkylated aryl polyether alcohols such as obtained by condensation of a phenol or phenol derivative with ethylene oxide, e.g. polyoxyethylene octylphenol.