Patent GB-769372-A (GB)
Title: Lubricating oil compositions
IPC: C10M137/14
Filed: 1955-04-25
Abstract: Oil-soluble salts of branched-chain primary aliphatic amines having at least 8 carbon atoms in their molecule with acids of formula <FORM:0769372/IV(b)/1> wherein R is a halohydrocarbon radicle, X is a non-metallic element of Group IV (b) of the Periodic Table and Y is hydrogen, XH a hydrocarbon radicle or a halohydrocarbon radicle, are employed as ingredients in lubricating compositions (see Group III). Specific branched-chain amines mentioned are 1,1,3,3-tetramethylbutylamine, 1,1,3,3,5,5-hexamethylhexylamine, 1,1,3,3,5,5,7,7-octamethyl octylamine, 1,1,3,3,5,5,7,7,9,9 - decamethyldecylamine, 2,2,4,4 - tetramethylpentylamine 2,2,4,4,6,6 - hexamethylheptylamine, tert. - tridecylamine, isoheptyldiethylcarbinylamine and iso-octylethylpropyl carbinylamine. Suitable phosphorus acids are trichloromethane, trichloromethanethio-, 1,1-dibromoethane-, 3,3,5-trichlorocyclohexane and 1,1-dichlorohexadecane - phosphinic acids; and trichloromethane -, 1,1 - dichloroethane -, 2,2,2 - trichloroethane -, tribromoethane -, dichloromonobromomethane -, 1,1 - dibromobutane -, 1,1-dichlorophenylethane -, 3,3,5 - trichlorocyclohexane -, 3,5 - dichlorocyclohexane -, 1,1 - dichloropropane -, 3,3,3 - tribromopropane -, 1,1-dichlorobutane -, dichlorophenylbenzene -, 1,1-dichloro - 2 - monobromobutane -, 1,1 - dichloro-octane -, trichloromethanethio -, 1,1 - dibromobutanethio -, 3,3,5 - trichlorocyclohexanethio -, 1,2 - dichloroethanethio - and trichloromethaneseleno - phosphonic acids.  The amine salts may be prepared by reacting the amine with the phosphorus acid at room temperature or elevated temperature, if desired in the presence of water or a solvent.  In examples, one mol. of trichloromethanephosphonic acid is heated with one or two mols. of mixed tertiary-C18-C24 alkyl primary amines or with two mols. of mixed tertiary-C12-C15 alkyl primary amines.ALSO:A lubricating composition, suitable for use under heavy duty conditions, comprises a major proportion of a lubricating oil and a minor proportion of an oil-soluble salt of a branched chain primary aliphatic amine having at least 8 carbon atoms in its molecule with an acid of formula <FORM:0769372/III/1> wherein R is a halohydrocarbon radicle, X is a non-metallic element of Group VIB of the Periodic Table and Y is hydrogen, XH, a hydrocarbon radicle or an halohydrocarbon radicle. The lubricating oil may be a mineral oil or a synthetic oil or a blend of these.  Suitable synthetic oils are polymerized olefins, alkylated aromatic compounds, silicone polymers, H2S adducts of unsaturated ethers and thioethers, and esters such as di (2 -ethyhexyl) sebacate.  Minor proportions of a fatty oil, such as castor oil or lard oil, may be blended with the mineral and/or synthetic lubricating oil.  Examples of suitable branched chain amines and of suitable halogen-containing phosphinic, phosphonic, thiophosphinic and thiophosphonic acids are given.  The lubricating oil composition may contain additional ingredients such as antioxidants, corrosion inhibitors, wear-reducing agents, blooming agents, pour point depressants, viscosity improvers or anti-foaming agents.  Examples of phenols and aromatic amines suitable as antioxidants, and of organic sulphur-phosphorous - or chlorine-containing compounds suitable as wear-reducing agents, are given.  The corrosion inhibitors may be dicarboxyic acids or organic compounds, such as a - cyano - stearic acid, containing acidic radicles in close proximity to a nitrile, nitro or nitroso group. Other additional ingredients which may be employed are urea or thiourea derivatives, isobutylene polymers and polymerized unsaturated esters.  In the examples, lubricating compositions are described which consist of mineral lubricating oil and a salt formed between trichloromethane phosphonic acid and dimethyl neopentyl carbinyl amine of commercial mixtures of C12 - C15 or C18-24 tertiary alkyl primary amines. For comparison purposes, lubricating compositions are described which consist of mineral lubricating oil and (a) a salt formed between trichloromethane phosphonic acid and di- 2 - ethylhexylamine, n - octodecylamine or commercial C12-C18 secondary straight chain amines or (b) trichloromethane phosphonic acid itself.