Patent GB-851589-A (GB)
Title: Lubricating oils
Inventor: EPTON SIDNEY ROBERT
IPC: C08F26/06
Filed: 1959-05-28
Abstract: The invention comprises the salt of a polymeric amine and dithiocarbamic acid or an N-substituted derivative thereof.  The polymeric amine may be a polymer or copolymer of vinyl pyridine, vinyl quinoline, aminostyrene, a polyamine prepared by reducing in the presence of ammonia or an amine a copolymer of a monoolefine and carbon monoxide, a hydrogenated copolymer of 1,3-butadiene and acrylonitrile, a polymer or copolymer of an acrylate or methacrylate of a hydroxy alkyl tertiary amine such as diethylaminoethyl methacrylate, or a polymeric amine obtained by reacting a polymer containing epoxy groups with ammonia or an amine.  The dithiocarbamic acid may be substituted in the N- position with alkyl, aralkyl, cycloalkyl or aryl groups.  The salt is prepared by reacting the polymeric amine with the dithiocarbamic acid, or a salt, such as the hydrochloride, of the polymeric amine with a salt, such as the sodium salt, of the dithiocarbamic acid, in a solvent.  In examples the salts prepared are the dibutyl dithiocarbamate and the di(2-ethylhexyl) dithiocarbamate of a copolymer of lauryl methacrylate stearyl methacrylate, methyl methacrylate and 2-methyl-5-vinyl-pyridine, and the dibutyl dithiocarbamate of a copolymer of lauryl methacrylate and 2-methyl-5-vinyl-pyridine. Specifications 760,554, 818,254 and 845,135 are referred to.ALSO:A lubricating oil composition contains 0.1 to 20% by weight of a salt of a polymeric amine and dithiocarbamic acid or an N-substituted derivative thereof.  The polymeric amine may be a polymer or copolymer of vinyl pyridine, vinyl quinoline, aminostyrene, a polyamine prepared by reducing (in the presence of ammonia or an amine) a copolymer of a mono-olefine and carbon monoxide, a hydrogenated copolymer of 1,3-butadiene and acrylonitrile, a polymer or copolymer of an acrylate or methacrylate of a hydroxy alkyl tertiary amine such as diethylaminoethyl methacrylate, or a polymeric amine obtained by reacting a polymer containing epoxy groups with ammonia or an amine.  The dithiocarbamic acid may be substituted in the Nposition with alkyl, aralkyl, cycloalkyl or aryl groups.  The salt is prepared by reacting the polymeric amine with the diothiocarbamic acid, or a salt (such as the hydrochloride) of the polymeric amine with a salt (such as the sodium salt) of the dithiocarbamic acid, in a solvent.  The lubricating oil may be a mineral oil or a synthetic oil such as polymerized olefins, copolymers of alkylene glycols and alkylene oxides, di(2-ethylhexyl) sebacate, dioctyl phthalate, trioctyl phosphate, polymeric tetrahydrofurane, or a dimethyl silicone polymer. Hydrocarbon lubricating oils may be blended with castor oil, lard oil or a synthetic lubricating oil.  The lubricating oil may also contain other additives which are listed.  In examples, mineral lubricating oil contains the dibutyl dithiocarbamate and the di(2-ethylhexyl) dithiocarbamate of a copolymer of lauryl methacrylate, stearyl methacrylate, methyl methacrylate and 2-methyl-5-vinylpyridine, and the dibutyl dithiocarbamate of a copolymer of lauryl methacrylate and 2-methyl-5-vinylpyridine. Specifications 760,554, 818,254 and 845,135 are referred to.