Patent GB-818962-A (GB)
Title: Organic compounds containing phosphorus and sulfur, and lubricants containing such compounds
IPC: C07F9/02
Filed: 1956-01-19
Abstract: A lubricating composition, suitable for use as a gear lubricant under extreme pressure conditions, comprises a lubricating oil and 1-20 per cent by weight of a substantially neutral phosphorus- and sulphur-containing material prepared by reacting together, while an inert gas is bubbled through the reaction mixture, (a) a substance of formula <FORM:0818962/III/1> wherein A and B are the same or different radicles chosen from RO, RS and R, R being an organic group, e.g. a hydrocarbon group which may carry non-functional substituents which do not take part in or influence the reaction, and X is oxygen or sulphur and (b) at least an equivalent amount of an organic epoxide or thio-epoxide. Instead of the reaction product itself, a derivative obtained by reacting the reaction product with a basic inorganic metal compound may be employed, suitable metal compounds being oxides, hydroxides or carbonates, and particularly the oxides of calcium, barium, zinc and cadmium.  The abovementioned group R may be an alkyl, cycloalkyl, aryl, aralkyl, alkaryl, alkenyl or cycloalkenyl group, which may carry nitro, halo, alkoxy, hydroxy or carboxy substituents.  Reactant (b) may be ethylene oxide, propylene oxide, epichlorohydrin, 1-butene oxide, butadiene monoxide, 1-amylene oxide, styrene oxide, epoxidized fatty oils, epoxy stearic acid or propylene sulphide.  The reaction of (i) propylene oxide with O,O-di-(2-ethylhexyl) phosphorodithioic acid, O,O-di-(2-methylpentyl-4) phosphorodithioic acid, O,O-di-(isopropyl) phosphorodithioic acid, or O,O-di-(n-hexyl) phosphorodithioic acid; (ii) epichlorohydrin with O,O-di-(2-methylpentyl-4) phosphorodithioic acid; and (iii) styrene oxide with O,O-di-(2-ethylhexyl) phosphorodithioic acid is described.  The further reaction of the epichlorohydrin/O,O-di-(2-methylpentyl-4) phosphorodithioic acid reaction product with zinc oxide, and the further reaction of the propylene oxide/O,O-di-(isopropyl) phosphorodithioic acid reaction product with cupric or mercuric oxide are also described. A lubricating composition is described which consists of mineral oil, 2 - methylamyl - 4 - phosphite, bis (2-methylamyl-4-) phosphite, chlorinated paraffin wax and the propylene oxide/ O,O-di-(2-ethylhexyl) phosphorodithioic acid reaction product.ALSO:A material containing phosphorus and sulphur, which material is suitable as a lubricating oil additive (see Group III) is prepared by reacting together, while an inert gas is bubbled through the mixture, (a) a substance of formula <FORM:0818962/IV (b)/1> wherein A and B are the same or different radicles chosen from RO, RS and R, R being an organic group, e.g. a hydrocarbon group which may carry non-functional substituents which do not take part in or influence the reaction, and X is oxygen or sulphur; and (b) at least an equivalent amount of an organic epoxide or thio-epoxide. The material thus obtained may be further reacted with a basic inorganic metal compound, such as an oxide, hydroxide or carbonate, and in particular an oxide of calcium, barium, zinc or cadmium.  The abovementioned group R may be an alkyl, cycloalkyl, aryl, aralkyl, alkaryl, alkenyl or cycloalkenyl group, which may carry nitro, halo, alkoxy, hydroxy or carboxy substituents. Reactant (b) may be ethylene oxide, propylene oxide, epichlorohydrin, 1-butene oxide, butadiene monoxide, 1-amyleneoxide, styrene oxide, epoxidized fatty oils, epoxy stearic acid or propylene sulphide.  The reaction of (i) propylene oxide with O,O-di (2-ethyl-hexyl) phosphorodithioic acid, O,O-di (2-methylpentyl-4) phosphorodithioic acid, O,O-di (isopropyl) phosphorodithioic acid, or O,O-di (n-hexyl) phosphorodithioic acid; (ii) epichlorohydrin with O,O-di (2-methylpentyl-4) phosphorodithioic acid; and (iii) styrene oxide with O,O-di (2-ethylhexyl) phosphorodithioic acid is described. The further reaction of the epichlorohydrin/O,O-di (2-methylpentyl-4) phosphorodithioic acid reaction product with zinc oxide, and the further reaction of the propylene oxide/O,O-di (isopropyl) phosphorodithioic acid reaction product with cupric or mercuric oxide are also described.