Patent GB-653352-A (GB)
Title: Production of sulphurised polymers and lubricating compositions containing the same
IPC: C08G65/327
Filed: 1948-05-31
Abstract: Sulphurized polymers suitable as lubricants or in lubricating compositions, e.g. as extreme-pressure additives, are produced by treating polymerized alkylene oxide or alkylene glycol with sulphur, a sulphur halide or a phosphorus sulphide.  Alkylene oxides mentioned are ethylene, propylene, 1,2-butylene, 2,3-butylene, isobutylene, tetramethylene, methylphenylethylene, cyclohexene, methylcyclohexene, 1,2-cetene, epichlorhydrin, epibromhydrin, glycidol, and 1,2-epoxy-2-butanol.  Copolymers may also be sulphurized.  A large number of different alkylene glycols which may be polymerized alone or in combination and sulphurized is also mentioned.  The proportion of sulphur to polymer may be as high as 30 per cent but is preferably between 1 and 20 per cent. Excess of the sulphurizing material may be employed, unused material being removed or, if desired, left in solution in the sulphurized polymer.  The products may be mixed with oleaginous materials such as mineral, fatty or vegetable oils or animal or fish oils.  The oleaginous material may be modified by halogenation, hydrogenation or alkylation.  Paraffinic, naphthenic, asphaltic base oils or alkylene oxide polymers or copolymers may also be mixed with the sulphurized products of the invention.  The latter type of mixture may be prepared by treating an alkylene oxide polymer with a minor amount of sulphurizing agent.  Gelling agents, e.g. lithium stearate, stabilizers, anti-corrosion agents, viscosity index improvers and thickeners may also be added to the lubricating compositions of the invention.  In examples: (1) polymerized propylene oxide was heated with flowers of sulphur; (2) a trimethylene glycol-diethylene glycol copolymer was heated with sulphur; (3) polymerized propylene oxide was heated with sulphur monochloride; (4) polymerized propylene oxide was heated with sulphur dichloride; (5) polymerized propylene oxide was heated with phosphorus pentasulphide.ALSO:Sulphurized polymers suitable as lubricants or in lubricating compositions, e.g. as extreme pressure additives, are produced by treating polymerized alkylene oxide or alkylene glycol with sulphur, a sulphur halide or a phosphorus sulphide.  Alkylene oxides mentioned are ethylene, propylene, 1,2-butylene, 2,3-butylene, isobutylene, tetramethylethylene, methylphenylethylene, cyclohexene, methylcyclohexene, 1,2-cetene, epichlorhydrin, epibromhydrin, glycidol, and 1,2-epoxy-2-butanol. Co-polymers may also be sulphurized.  A large number of different alkylene glycols which may be polymerized alone or in combination and sulphurized is also mentioned.  The proportion of sulphur to polymer may be as high as 30 per cent but is preferably between 1 and 20 per cent.  Excess of the sulphurizing material may be employed, unused material being removed or, if desired, left in solution in the sulphurized polymer.  The products may be mixed with oleaginous materials such as mineral, fatty or vegetable oils or animal or fish oils.  The oleaginous material may be modified by halogenation, hydrogenation or alkylation. Paraffinic, naphthenic, asphaltic base oils or alkylene oxide polymers or copolymers may also be mixed with the sulphurized products of the invention.  The latter type of mixture may be prepared by treating an alkylene oxide polymer with a minor amount of sulphurizing agent.  Jelling agents, e.g. lithium oleate, stabilizers, anti-corrosive agents, viscosity index improvers and thickeners may also be added to the lubricating compositions of the invention.  In examples (1) polymerized propylene oxide was heated with flowers of sulphur; (2) a trimethylene glycol-diethylene glycol copolymer was heated with sulphur; (3) polymerized propylene oxide was heated with sulphur monochloride; (4) polymerized propylene oxide was heated with sulphur dichloride; (5) polymerized propylene oxide was heated with phosphorus pentasulphide.