Patent GB-822452-A (GB)
Title: Grease compositions
IPC: C07D233/04
Filed: 1957-11-28
Abstract: A grease composition, suitable for lubrication in the presence of water and capable of being pumped at ordinary temperatures, comprises an oleoginous vehicle, a soap thickening agent (which is a lithium, a calcium or a mixed lithium and calcium soap derived from a monocarboxylic acid containing 14-22 carbon atoms per molecule) in an amount sufficient to thicken the vehicle to a grease, and 1-3% by weight of a reaction product of a naphthenic acid with an ethylene polyamine R.NH.(C2H4.NH)nH (wherein R is hydrogen or an aliphatic group and n is at least 1), 2-4 molar proportions of the naphthenic acid being reacted with 1 molar proportion of the polyamine when R is hydrogen or an aliphatic group having less than 7 carbon atoms, and 1-2 molar proportions of the naphthenic acid being reacted with 1 molar proportion of the polyamine when R is an aliphatic group having at least 8 carbon atoms.  The soap may be derived from animal, vegetable or marine fatty materials, while the naphthenic acid-ethylene polyamine reaction product may be an imidazoline and may contain an amido group.  The grease composition may contain additional ingredients such as amines, phenols, sulphides, free fat, free fatty acids, esters of aliphatic and/or aromatic acids, sulphurized fats, lead soaps, and molybdenum disulphide.  In the examples, the oleoginous vehicle is mineral lubricating oil; the polyamine with which the naphthenic acid is reacted is diethylene triamine; the soaps are derived from stearic (palmitic) oleic acid mixture, hydrogenated soya fatty acids, tallow, or stearic/12-hydroxy-stearic acid mixture; and in some cases a mixture of mono- and di-heptyl diphenylamines is present as an antioxidant. The effects of replacing the soaps by a mixture of sodium stearate with lithium stearate or sodium oleate, and of replacing the naphthenic acidpolyamine reaction product by sodium petroleum sulphonate or oleic acid-diethylene triamine reaction product are described.  Specification 813,525 is referred to.ALSO:Naphthenylimidazoline derivatives are prepared by reacting a naphthenic acid with an ethylene polyamine R.NH.(C2H4.NH)nH (wherein R is hydrogen or an aliphatic group and n is at least 1), 2-4 molar proportions of the naphthenic acid being reacted with 1 molar proportion of the polyamine when R is hydrogen or an aliphatic group having less than 7 carbon atoms and 1-2 molar proportions of the naphthenic acid being reacted with 1 molar proportion of the polyamine when R is an aliphatic group having at least 8 carbon atoms.  In examples, naphthenic acids are refluxed in xylene solution with diethylene triamine, triethylene tetramine or tetraethylene pentamine, specified products being 1-naphthen-amido-ethyl - 2 - naphthenyl imidazolines, 1 - amino-ethyl - 2 - naphthenyl imidazolines, ethylene-1,11 - bis - 2 - naphthenyl imidazolines or 1-naphthen - amido - triethylenediimino - 2 - naphthenyl imidazolines.  For comparison purposes, the production of 1-octadecenyl-amido-ethyl - 2 - octadecenyl imidazoline, by refluxing oleic acid in xylene solution with diethylenetriamine, is described. Specification 813,525 is referred to.