Patent GB-819169-A (GB)
Title: Phosphorus-and-sulfur-containing materials and lubricants containing them
IPC: C07F9/02
Filed: 1956-01-19
Abstract: A lubricating composition, particularly suitable as a gear lubricant, comprises a lubricating oil and a phosphorus- and sulphur-containing material prepared by reacting an equivalent amount of a metal salt of an acid of formula <FORM:0819169/III/1> wherein A and B are the same or different radicles and X is oxygen or sulphur, with at least an equivalent amount of an organic epoxide or thio-epoxide.  Radicles A and B are non-functional, in that they do not take part in or have any significant influence upon the reaction, and may be chosen from RO, RS, HS, HO and R, at least one of them being organic.  The radicle R may be alkyl, cycloalkyl, aryl, aralkyl, alkaryl, alkenyl or cycloalkenyl, and may carry organic or inorganic substituents such as nitro, alkoxy, hydroxy or carboxy groups or halogen atoms. Suitable epoxides are ethylene oxide, propylene oxide, epichlorohydrin, 1-butene oxide, butadiene monoxide, 1-amylene oxide, styrene oxide, trimethylene oxide and 9,10-epoxystearic acid.  The metal salts may be salts of sodium, lithium, potassium, calcium, barium, strontium, magnesium, aluminium, lead, cadmium or zinc.  The lubricating composition may contain additional ingredients such as oxidation inhibitors, extreme pressure agents, rust inhibitors and oiliness agents.  Specific additional ingredients are organic sulphides, particularly organic polysulphides such as benzyl tetra- and/or pentasulphide, butyl tetrasulphide and chlorobenzyl tetrasulphide.  In examples, mineral lubricating oil compositions are described containing the reaction products of (1) propylene oxide and zinc, molybdenum or cadmium o,o-di-(4-methyl-2-pentyl) dithiophosphate; (2) epichlorohydrin or propylene sulphide and zinc o,o-di-(4-methyl-2-pentyl) dithiophosphate; (3) propylene oxide octylene oxide or styrene oxide and mixed zinc o,o - di - (4 - methyl - 2 - pentyl) dithiophosphate and zinc o,o-di-isopropyldithiophosphate; (4) propylene oxide and zinc o,o-di-isobutyl or o,o - di - (sec. amyl - phenyl) or o,o - di - (nonylphenoxy-ethyl) dithiophosphate; (5) propylene oxide and zinc o,o-di-(propyl-phenyl) dithiophosphinate or zinc o,o-di-(4-methyl-2-pentyl) monothiophosphate; (6) ethylene oxide and zinc o,o-di-isopropyl dithiophosphate; or (7) propylene oxide and lead o,o-di-(2-ethyl-hexyl) dithiophosphate.  Specification 796,181 is mentioned in a disclaimer.  Specification 787,083 also is referred to.ALSO:A material containing phosphorus and sulphur, which material is suitable as a lubricating oil additive (see Group III), is prepared by reacting an equivalent amount of a metal salt of an acid of formula <FORM:0819169/IV (b)/1> wherein A and B are the same or different radicals and X is oxygen or sulphur, with at least an equivalent amount of an organic epoxide or thio-epoxide.  Radicles A and B are non-functional, in that they do not take part in or have any significant influence upon the reaction, and may be chosen from RO, RS, HS, HO and R, at least one of them being organic.  The radicle R may be alkyl, cycloalkyl, aryl, aralkyl, alkaryl, alkenyl or cycloalkenyl, and may carry organic or inorganic substituents such as nitro, alkoxy, hydroxy or carboxy groups or halogen atoms. Suitable epoxides are ethylene oxide, propylene oxide, epichlorohydrin, 1-butene oxide, butadiene monoxide, 1-amylene oxide, styrene oxide, trimethylene oxide and 9,10-epoxystearic acid.  The metal salts may be salts of sodium, lithium, potassium, calcium, barium, strontium, magnesium, aluminium, lead, cadmium or zinc.  In examples, the preparation is described of the reaction products of (a) propylene oxide and zinc, molybdenum or cadmium, o,o-di-(4 - methyl - 2 - pentyl) - dithiosphosphate, (b) epichlorohydrin or propylene sulphide and zinc o,o - di - (4 - methyl - 2 - pentyl) dithiosphosphate, (c) propylene oxide, octylene oxide or styrene oxide and mixed zinc, o,o-di-(4-methyl-2-pentyl) dithiosphosphate and zinc o,o-di-isopropyldithiophosphate, (d) propylene oxide and zinc o,o-di-isobutyl or o,o-di-(sec. amyl-phenyl) or o,o-di-(nonyl-phenoxyethyl) dithiophosphate, (e) propylene oxide and zinc o,o-di-(propyl-phenyl) dithiophosphinate or zinc o,o - di - (4 - methyl - 2 - pentyl) monothiophosphate, (f) ethylene oxide or butylene oxide and zinc o,o-di-isopropyl dithiophosphate, or (g) propylene oxide and lead o,o-di-(2-ethyl-hexyl) dithiophosphate. Specification 796,181 is mentioned in a disclaimer.  Specification 787,083 also is referred to.