Patent GB-782261-A (GB)
Title: Improvements in or relating to a lubricant grease and method of preparing same
IPC: C10M115/08
Filed: 1953-10-27
Abstract: A lubricant grease comprises a lubricating oil thickened to grease consistency with at least one arylcarbamyl compound melting above 250 DEG  F. and comprising R-CO-NHR1, R.CO.NH.R2-NH.CO.R1, R-NH.COR2.CO NHR1, R.NH.CO.NHR1, and/or R.NH.CO.-NHR2-NHCONHR1, where R and R1 are aryl, alkylaryl, substituted aryl and/or substituted alkylaryl radicals, and R2 is arylene, alkylarylene, substituted arylene and/or substituted alkylarylene.  The aryl or alkyl aryl radicals may be substituted by hydroxy, carboxy or nitro groups or halogen atoms. Arylcarbamyl compounds referred to are N-benzoyl-4-aminobiphenyl, N-benzoyl p-amino benzoic acid, N,N1 - dibenzoylbenzidine, N,N1 - dibenzoyl - p - phenylenediamine and N,N1 - bis - (p - nitrobenzoyl) - benzidine; p - carboxyl - 1,3 - diphenyl urea, p-chloro-1,3-diphenylurea, 1,3-di-(1 - naphthyl) - urea, 4,41 - bis - (3 - p - biphenylylureido) - biphenyl, 1 - (p - carboxylphenyl)-3-(p-biphenylyl)-urea, 1-(p-carboxyphenyl)-3-(o - biphenylyl) - urea, 1,3 - di - (p - biphenylyl)-urea, 1,3 - di - (o - biphenylyl) - urea, 4,41 - bis - (3 - p - tolylureido) biphenyl, 4,41 - bis - (3 - phenyl - ureido) - 3,31 - dimethoxy biphenyl, p-phenyl - carbamate - 1,3 - diphenylurea, p - cyano - 1,3 - diphenyl urea, 1 - (2,5 - dichlorophenyl) - 3 - phenylurea, 4,41 - bis - [3 - (2,5 - dichloro - phenyl) - ureido] - biphenyl, 1,4 - bis - [3 - (2 - chlorophenyl) - ureido] - benzene, 1,4 - bis - [3 - (3 - chlorophenyl) - ureido] - benzene, 1,3 - bis - [3 - (3 - chlorophenyl) - ureido] - benzene and 1,3 - bis - [3 - (2 - chlorophenyl)-ureido]-benzene.  Lubricating oils referred to are petroleum oils and synthetic oils such as polymers of unsaturated hydrocarbons, silicone polymers, polyalkylene glycols and their derivatives, high molecular weight esters of dicarboxylic acids, benzyl benzoate, tricresyl phosphate and polyfluoro derivatives of organic compounds; examples of suitable oils are given.  The grease may contain from 5-70 per cent of the thickener.  The grease may be formed by mixing the oil and the thickener, with or without a solvent such as dioxane, and milling the mixture; or by forming the thickener in situ in the oil, heating to 450 DEG  F., cooling and milling.  The use of benzanilide in lubricating compositions, as disclosed in Specification 672,875, is disclaimed.ALSO:Amides and diamides are prepared by reaction of an aromatic amine or diamine, such as phenylene diamine, aniline or benzidine, with an aroyl halide, e.g. benzoyl chloride.  Diamides may also be prepared by reacting an aromatic mono-amine, e.g. aniline, with an aroyl halide, e.g. phthalyl chloride.  Amides and diamides referred to are N-benzoyl-4-amino-biphenyl, N-benzoyl p-amino benzoic acid, N,N1-dibenzoylbenzidine, N,N1-dibenzoyl-p-phenylene diamine and N,N1-bis-(p-nitrobenzoyl)-benzidine.  Ureas and di-ureas are prepared by reacting an amine or diamine such as aniline, benzidine or phenylene-diamine with an isocyanate of benzene or diphenyl. Compounds referred to are p - carboxyl - 1,3 - diphenyl urea, p - chloro-1,3-diphenyl urea, 1,3-di-(1-naphthyl)-urea, 4,41-bis - (3 - p - biphenylureido) - biphenyl, 1 - ( p - carboxyphenyl - 3 - (p - biphenylyl) - urea, 1 - (p - carboxyphenyl) - 3 - (o - biphenylyl) - urea, 1,3-di-(p-biphenylyl)-urea, 1,3-di-(o-biphenylyl) - urea, 4,41 - bis - (3 - p - tolylureido) biphenyl, 4,41 - bis - (3 - phenyl - ureido) - 3,31 - dimethoxy biphenyl, p - phenyl - carbamate - 1, 1,3 - diphenyl urea, p-cyano-1,3-diphenyl urea, 1-(2,5-dichlorophenyl)-3-phenyl urea, 4,41-bis-[3-(2,5 - dichloro - phenyl) - ureido] - biphenyl, 1,4-bis - [3 - (2 - chlorophenyl) - ureido] - benzene, 1,4 - bis - [3 - (3 - chlorophenyl) - ureido] - benzene, 1,3 - bis - [3 - (3 - chlorophenyl) - ureido] - benzene and 1,3 - bis - [3 - (2 - chlorophenyl) - ureido]-benzene.