Patent GB-822632-A (GB)
Title: Lubricating oil compositions
IPC: C08F255/08
Filed: 1956-11-23
Abstract: A lubricating oil composition comprises a lubricating oil and a polymer obtained by subjecting to high energy ionizing radiation a mixture of polymeric material and one or more polymerizable monomers, at least one of the polymerizable monomers being different from the monomer or monomers from which the polymeric material is derived (see Group IV (a)).  Preferred polymers are those in which the original polymeric material is an isobutylene polymer or copolymer.  The lubricating oil may be a mineral lubricating oil, a hydrogenated oil, shale oil, a synthetic oil prepared by the polymerization of olefins, by the reaction of oxides of carbon with hydrogen or by the hydrogenation of coal, an animal, vegetable or fish oil or their hydrogenated or voltolized products in admixture with a mineral oil, an ester of a monobasic acid, e.g. the ester of C8 oxo alcohol with C8 oxo acid or ester of C13 oxo alcohol with octanoic acid, an ester of a dibasic acid, e.g. di-2-ethyl hexyl sebacate and di-nonyl adipate, a glycol ester, e.g. C13 oxo acid diester of tetraethylene glycol, a complex ester, a phosphoric acid ester, e.g. the ester formed by contacting three mols. of the mono-methyl ether of ethylene glycol with one mol. of phosphorus oxychloride, a halocarbon oil, e.g. the polymer of chlorotrifluoroethylene containing twelve recurring-units of chlorotrifluoroethylene, an alkyl polysiloxane, a sulphite ester, a carbonate, a mercaptal, a formal, or a polyglycol, mixtures of any of the above.  Other agents may be added such as dyes, pour depressors, heat-thickened fatty oils, organo-metallic compounds, metallic or other soaps, sludge dispersers, anti-oxidants, thickeners, viscosity index improvers, oiliness agents, resins, rubber, olefin polymers, voltolized fats, mineral oils or waxes, graphite, molybdenum disulphide, and solvents and assisting agent such as esters, ketones, alcohols, aldehydes and halogenated or nitrated compounds.ALSO:Graft polymers are obtained by subjecting to high-energy ionizing radiation a mixture of polymeric material and one or more polymerizable monomers, at least one of the polymerizable monomers being different from the monomer or monomers from which the polymeric material is derived.  The polymeric material may be a homopolymer of ethylene, propylene, isobutylene, styrene, a -methyl styrene, butadiene, isoprene, vinyl chloride, tetrafluoroethylene, trifluorochloro-ethylene, methyl or decyl acrylate, methyl, lauryl, mixed C8 to C18 or diethylaminoethyl methacrylate, vinyl acetate, isobutyrate or 2-ethylhexoate, the vinyl ester of coconut acids or of C10 oxo acids made by the oxonation of tripropylene, vinyl isobutyl or decyl ether or the vinyl ether of C8 oxo alcohol made by the oxonation of a C7 monoolefin, an aconitate or itaconate ester of mixed alcohols obtained by the hydrogenation of coconut oil, acrylonitrile or methacrylonitrile, or may be a copolymer of ethylene and propylene, isobutylene and styrene, butadiene and isobutylene, butadiene and methyl styrene, isobutylene and ethyl fumarate, octadecene and lauryl maleate, styrene and tetradecyl fumarate, ethyl methacrylate and octyl fumarate, methyl acrylate and dodecyl maleate, octadecyl fumarate and octyl aconitate, methyl methacrylate and methyl itaconate, isopropenyl acrylate and tetradecyl acrylate, vinyl acetate and fumarate esters of tallow alcohols, vinyl 2-ethyl butyrate and isodecyl maleate, isopropenyl acetate and the itaconic esters of coconut alcohols, acrylonitrile and butadiene, aminoisobutyl methacrylate and tetradecyl methacrylate, or methacrylamide and vinyl 2-ethylhexoate.  The monomer or monomers may be one or more of ethylene, propylene, n-butylene, tetramethyl nonene, octadecene, styrene, methyl styrene, butadiene, isoprene, dimethyl butadiene, pentadiene, cyclopentadiene, methylcyclopentadiene, vinyl chloride, tetrafluoroethylene, trifluorochloroethylene, methyl or decyl acrylate, methyl, lauryl, diethylaminoethyl or mixed C7 to C18 methacrylates, vinyl acetate, isobutyrate or 2-ethylhexoate or a vinyl ester of coconut acids or of C10 oxo acids made by the oxonation of tripropylene, vinyl isobutyl or vinyl decyl ether or the vinyl ether of C8 oxo alcohol made by the oxonation of C7 monoolefin, ethyl or octyl fumarate, lauryl maleate, the aconitate and itaconate esters of mixed alcohols obtained by the hydrogenation of coconut oil acids, acrylonitrile, methacrylonitrile, dibutyl itaconate, butyl sorbate, ethyl oleate, vinyl laurate, vinyl stearate, isopropenyl acetate, allyl acetate, 2-ethyl hexoate or stearate, octene, cyclohexene, dipentene, alphapinene, butyl, decyl or cetyl acetylene, propyl methylacetylene, octyl acrylamide, octyl methacrylamide, butyl acrylamide, or vinyl pyrrolidone, carbazole, pyridine, piperidine or quinoline.  The polymers may be used as lubricating oil additives.