Patent GB-731772-A (GB)
Title: Lubricating compositions
IPC: C10M141/10
Filed: 1953-07-20
Abstract: Oxazolines are prepared by reacting an amino hydroxy compound with an aliphatic carboxylic acid or a nitrile.  Oxazolidines are prepared by reacting an amino hydroxy compound with an aldehyde. Salts of oxazoline, isoxazoline, oxazolidine and isoxazole are formed by reaction with organic acids, such as fatty acids, hydroxy fatty acids, especially those having at least 10 carbon atoms, polycarboxylic acids, aromatic substituted aliphatic acids, naphthenic acids, sulphonic acids and phosphorus-containing acids. Examples of suitable reactants for the preparation of oxazolines and oxazolidines and of organic acids for the formation of the salts are given.ALSO:A lubricating composition comprises a major proportion of a lubricating oil and minor proportions of boric acid, silicic acid or a polysilicic acid or a mixture thereof, a phosphatidic material and a salt of a compound containing a heterocyclic five-membered ring containing carbon, nitrogen and oxygen with an organic acid.  The phosphatidic material is a phosphatide or a sulphurization, phosphorization and/or halogenation product thereof; materials referred to are lecithin, cephalin and phosphatides extracted from soya bean oils.  Salts specified are those of oxazoline, isoxazoline, oxazolidine and isoxazole and substitution products thereof, with organic acids such as fatty acids, hydroxy fatty acids, polycarboxylic acids, aromatic substituted aliphatic acids, naphthenic acids, sulphonic acids and phosphorus containing acids. Many suitable salts are specified. The lubricating oil may be a natural or synthetic oil, for example a hydrocarbon oil, such as a mineral oil, and synthetic oils such as polymerized olefins, copolymers of alkylene glycols and alkylene oxides, organic esters, e.g. di-(2-ethylhexyl) sebacate, dioctyl phthalate and trioctyl phosphate, polymeric tetrahydrofuran and polyalkyl silicone polymers, e.g. dimethyl silicone polymer; these oils may be blended with fatty oils, such as castor or lard oil.  The compositions may be prepared by dissolving the phosphatidic material and the salt in the lubricating oil, adding a solution of the inorganic acid in water and an organic solvent such as dioxane, mixing the solutions and heating to remove water and solvent.  Optional ingredients of the composition are antioxidants, such as alkyl phenols, e.g. 2,4,6-trimethyl phenol, pentaethyl phenol, 2,4-dimethyl-6-tertiary-butyl phenol, 2,4-dimethyl-6-octyl phenol, 2,6-ditertiary-butyl-4-methyl phenol and 2,4,6-tritertiary butyl phenol, aminophenols, such as benzyl amino phenols, and amines, e.g. dibutylphenylene diamine, diphenylamine, N-phenyl alpha and beta naphthylamines and dinaphthylamine; corrosion inhibitors such as dicarboxylic acids having at least 16 carbon atoms and certain organic compounds containing acidic radicals and nitrile, nitro or nitroso groups, e.g. alpha-cyano-stearic acid; wear-reducing agents such as phosphorus acid esters for example, certain phosphates, thiophosphates and phosphites, various organic sulphides and disulphides, e.g. diphenyl, diphenol, dicresol, dixylenol, methyl butyl diphenol, and dibenzyl mono-, di- and tri-sulphides, sulphurized fatty oils and esters of fatty acids and monohydric alcohols, e.g. sulphurized sperm or jojoba oils, sulphurized long chain olefins, e.g. those obtained by dehydrogenating or cracking wax, sulphurized phosphorized fatty oils or acids, phosphorus acid esters having sulphurized organic radicals, such as phosphorus esters with sulphurized hydroxy fatty acids, chlorinated hydrocarbons such as paraffins, aromatic hydrocarbons, terpenes or mineral lubricating oil and certain chlorinated esters of fatty acids; anti-foaming agents such as dimethyl silicone polymer; and urea or thiourea derivatives, e.g. urethanes, allophanates, carbazides and carbazones, polyisobutylenes and polymerized unsaturated esters of fatty acids and monohydric alcohols.