| 摘要 |
Lubricating oil compositions comprise a natural or synthetic lubricating oil and a copolymer of a dialkenyl derivative of a phosphorus acid with at least one mono-olefinically unsaturated compound containing an oleophilic hydrocarbon chain of at least 8 carbon atoms (see Group IV(a)). The lubricating oil may be a hydrocarbon lubricating oil obtained from paraffinic or naphthenic crude or mixtures thereof which may be replaced wholly or in part by a synthetic lubricating oil such as a polymerized olefin, copolymers of alkylene glycols and alkylene oxides and their esters and ethers, polyphenyl ethers, di-2-ethylhexyl sebacate, dioctyl phthalate, trioctyl phosphate and dimethylsilicone polymers. The compositions may contain other conventional additives such as metal dithiophosphates, metal organic sulphonates, metal organic sulphonates, metal thiocarbamates, amines such as phenyl alphanaphthylamine, 2,6-ditertiarybutyl-4-methylphenol and 4,41-methylene bis(2,6-ditertiary butyl phenol).ALSO:Relates to copolymers of dialkenyl derivatives of phosphonous acids with at least one monoolefinically unsaturated compound containing an oleophilic hydrocarbon chain of at least 8 carbon atoms. The phosphonous acid derivative may be diallyl, dimethallyl, allyl methallyl or divinyl phenylphosphonite, diallyl isopropylphosphonite, dimethallyl cyclohexylphosphonite, diallyl 2-ethylhexylphosphonite ethyl allyl allyl-phosphonite, allyl phenyl methallylphosphonite or a mixture thereof. The unsaturated compound may be decyl, lauryl, stearyl, eicosyl or docosyl acrylate, decyl, lauryl, cetyl or stearyl methacrylate, vinyl laurate, palmitate, stearate or oleate, methyl lauryl fumarate, decene, undecene, tridecene, pentadecene, octadecene, eicosene, tricosene or mixtures thereof. Minor proportions of lower alkyl esters of acrylic or methacrylic acid, such as methyl methacrylate, may also be present. Polymerization may be carried out in the presence or absence of an inert solvent and in the presence of a catalyst such as diethyl, di-tertiary butyl, benzoyl, dimethyl thienyl, dilauryl or urea peroxide, tertiary butyl hydroperoxide, sodium bisulphite, diethyl sulphoxide, ammonium persulphate, an alkali metal borate or azo(bisisobutyro) nitrile. |
