Patent GB-642960-A (GB)
Title: Lubricating composition
IPC: C10M107/24
Filed: 1947-10-06
Abstract: A lubricating composition comprises a polymeric ester of a saturated aliphatic monocarboxylic acid and an unsaturated monohydric alcohol, 0.2 to 6 per cent of a trialkylphosphite as corrosion inhibitor and/or an aromatic amine as oxidation inhibitor.  The esters may be formed from valeric, caproic, enanthylic, caprylic, pelargonic, capric, undecylic, lauric, myristic, pentadecanoic, palmitic, margaric, stearic, nonadecylic and arachidic acids and a -, b - and g -allyl alcohols, 2-butene-1-ol, 3-butene-3-ol, 3-pentene-2-ol, 1-pentene-3-ol, 3-pentene-2-ol, 4-pentene-1-ol, 5-hexene-3-ol and 6-octene-1-ol, by heating in the presence of p-toluene-sulphonic acid and benzene or toluene and the water removed by azeotropic distillation. Polymerization may be effected in the presence of diacyl, ketone, aldehyde and dialkyl peroxides or hydroperoxides. Preferably the polymer is fractionated to remove fractions distilling below 100 DEG  C. at 2 mm. Hg.  Residual unsaturation may be removed by hydrogenation.  The solid and liquid fractions may be mixed with polymeric hydrocarbons, alkylene oxides or glycols.  Specified esters are allyl butyrate, trimethylacetate, caproate, 2-methyl-valerate, caprylate, 2-ethylhexoate, pelargonate, caprate, methoxy-acetate, b -ethoxypropionate and phenoxyacetate. Amines specified are 2 - hydroxy - 5 - nitroaniline, p - anisidine, 2,4 - xylidene, p-phenylenediamine, N,N1-dibutyl-p-phenylenediamine, 2,4 - diaminotoluene, p - phenylaminophenol, di - (p - hydroxyphenyl) - amine, p-butylaminophenol, N,N1-diphenyl-p-phenylenediamine, N - (4 - hydroxyphenyl) - N1 - phenyl - p - phenylenediamine and N,N1-di-(p-hydroxyphenyl) - p - phenylenediamine. Phosphites specified are trimethyl, triethyl, tripropyl, tri-isopropyl, tributyl, triamyl, trihexyl, triheptyl, trioctyl, trimonyl, tridecyl, tridodecyl. methyl dibutyl and dimethyl butyl phosphites, Extreme pressure agents, e.g. the adduct of an olefinic compound such as diallyl ether and hydrogen sulphide which may have been reacted with sulphur, gelling agents, e.g. sodium, potassium and lithium soaps, protective colloids such as high molecular weight alcohols, glycol ethers, fatty acids, partially esterified polyhydric alcohols and polymers of alkylene oxides and glycols, and graphite, may be added.ALSO:A lubricating composition comprises a polymeric ester of a saturated aliphatic monocarboxylic acid and an unsaturated monohydric alcohol (see Group IV (a)), 0.2 to 6 per cent of a trialkylphosphite as corrosion inhibitor and/or an aromatic amine as oxidation inhibitor.  Preferably, the polymer is fractionated to remove fractions distilling below 100 DEG  C. at 2 mm. Hg. Residual unsaturation may be removed by hydrogenation.  The solid and liquid fractions may be mixed with polymeric hydrocarbons, alkylene oxides or glycols.  Specified esters are allyl butyrate, trimethylacetate, caproate, 2-methyl-valerate, caprylate, 2-ethylhexoate, pelargonate, caprate, methoxyacetate, b -ethoxypropionate and phenoxyacetate. Amines specified are 2-hydroxy-5-nitroaniline, p - anisidine, 2,4 - xylidene, p-phenylenediamine, N,N1-dibutyl-p-phenylenediamine, 2,4-diaminotoluene, p-phenylaminophenol, di-(p-hydroxyphenyl)-amine, p-butylaminophenol, N,N1 - diphenyl - p - phenylenediamine, N - (4 - hydroxyphenyl) - N1 - phenyl - p-phenylenediamine and N,N1 - di - (p - hydroxyphenyl)-p-phenylenediamine.  Phosphites specified are trimethyl, triethyl, tripropyl, triisopropyl, tributyl, triamyl, trihexyl, triheptyl, trioctyl, trinonyl, tridecyl, tridodecyl, methyl dibutyl and dimethyl butyl phosphites.  Extreme pressure agents, e.g. the adduct of an olefinic compound such as diallyl ether and hydrogen sulphide which may have been reacted with sulphur, gelling agents, e.g. sodium, potassium and lithium soaps, protective colloids such as high molecular weight alcohols, glycol ethers, fatty acids, partially esterified polyhydric alcohols and polymers of alkylene oxides and glycols, and graphite may be added.