Patent GB-744405-A (GB)
Title: Improvements in or relating to organic metal complexes
IPC: C10M159/20
Filed: 1952-11-03
Abstract: The invention comprises certain oil-soluble organic alkaline-earth metal complexes, obtainable by the processes of the parent Specification, having the empirical formula Q-M2(AO)y(AI)x wherein Q represents the hydrogen equivalent of the anions of an oil-soluble salt of at least one organic acid having at least 12 carbon atoms, M represents the hydrogen equivalent of at least one alkaline-earth metal (i.e. calcium, barium or strontium), AO represents the hydrogen equivalent of the anions of an organic alkaline-earth metal aqua-salt of at least one acid or potential salt-forming acid-reactive compound having an ionization constant in water of at least 10-10 at 25 DEG C., a water solubility at 50 DEG  C. of at least 0.0005 per cent, and in saturated aqueous solutions at about 25 DEG  C. a pH less than 7, AI represents the hydrogen equivalent of the anions of at least one inorganic alkaline-earth metal aqua-salt having a water solubility of at least 0.0003 per cent at 50 DEG  C. (including "salts of water"), and X, Y and Z are the number of equivalents of AI, AO and M respectively and are such that z=x+y+1, the ratio x/y is at least 1.5 when AO is a phenolic or enolic compound and at least 4.0 in other cases, and y is from 0.01 to 10.  Examples similar to and in many cases identical with those in the parent Specification are given.ALSO:Additives for lubricating oils, which may be of synthetic, vegetable, animal or preferably mineral origin, comprise oilsoluble organic alkaline-earth metal complexes having the empirical formula:-Q-Mz(AO)y(AI)x wherein Q represents the hydrogen equivalent of the anions of an oil-soluble salt of at least one organic acid (especially a sulphonic acid) having at least 12 carbon atoms, M represents the hydrogen equivalent of at least one alkaline-earth metal (i.e. calcium, barium or strontium).  AO represents the hydrogen equivalent of the anions of an organic alkaline-earth metal aqua-salt of at least one acid potential salt-forming acid-reactive compound having an ionization constant in water of at least 10-10 at 25 DEG C., a water solubility at 50 DEG C.of at least 0.0005 per cent, and in saturated aqueous solutions at about 25 DEG C. a pH less than 7, AI represents the hydrogen equivalent of the anions of at least one inorganic alkaline-earth metal aqua-salt having a water solubility of at least 0.0003 per cent at 50 DEG C. (including salts of water), and x, y and z are the number of equivalents of AI, AO and M respectively and are such that z=x+y+1, the ratio x/y is at least 1.5 when AO is a phenolic or enolic compound and at least 4.0 in other cases, and y is from 0.01 to 10.  These complexes may be prepared by the processes of the parent Specification, in many cases in the presence of mineral oil.  They may be used in conjunction with other additives such as oxidation inhibitors, detergents, extreme pressure agents, rust inhibitors, oil ness agents, foam inhibitors, pour point depressants, viscosity index improving agents, odour improving agents, and especially dithiophosphate salt-esters and/or phosphorus sulphide treated unsaturated organic materials.  Specific compounds used in examples in conjunction with various complexes of the type defined for addition to SAE 90 grade gear base oil are: chlorinated paraffin wax, chlorobenzyl disulphide, sulphurized lard oil, di . (4 - methyl - sec. - amyl) phosphite, benzyl disulphide, sulphurized methyl oleate, tert. - butyl disulphide, di - (methylcyclohexyl) phosphite, lead naphthenate, n-amyl tetrasulphide, chlorinated diphenyl ether, trilauryl thionophosphate, monolauryl phosphite, chlorinated di-isobutylene, n - hexyl disulphide, butyl toluenesulphonate, sulphurized oleic acid, dilauryl phosphate, benzyl thiocyanate, chlorinated foots oil, phenyl disulphide mono-n-hexyl phosphate and di - n - hexyl phosphite.