Patent ID: 6806241
Filing Date: 2004-10-19
Classification: C09K,C10M,C10N

Abstract:
A lubricating composition comprising a major amount of base oil and a minor amount of an antioxidant composition comprising:(1) an organomolybdenum compound prepared by reacting: (a) about 1.0 mole of fatty oil having 12 or more carbon atoms; (b) about 1.0 to 2.5 moles diethanolamine; and (c) a molybdenum source sufficient to yield about 0.1 to 12.0 percent of molybdenum based on the weight of the complex, the reaction being carried out at about 70Â° to 160Â° C.; (2) an alkylated diphenylamine being (a) a secondary alkylated diphenylamine of the formula Xâ€”NHâ€”Y, wherein X and Y each independently represent a substituted or unsubstituted phenyl group wherein the substituents for the phenyl group are selected form the group consisting of alkyl groups having 1 to 20 carbon atoms, alkylaryl groups, hydroxyl, carboxy and nitro groups and at least one of the phenyl groups is substituted with an alkyl group having 1 to 20 carbon atoms; or (b) the reaction reaction product of N-phenyl-benzenamine and 2,4,4-trimethylpentene; and (3) a sulfur compound selected as one or more of the group consisting of: (a) thiadiazole of formula (I): wherein R and R1 are independently selected from the group consisting of hydrogen, alkyl, hydroxyalkyl, alkylthio, phenylalkyl, alkylated phenyalkyl, terpene residue and maleic acid residue of the formula wherein R2 and R3 are independently selected from the group consisting of hydrogen, branched or straight chain alkyl groups and cyclic aliphatic groups, wherein at least one of R and R1 is not hydrogen; (b) a dithiocarbamate of formula (II), wherein, R4, R5, R6 and R7 which are the same of different and are hydrocarbyl groups having 1 to 13 carbon atoms; and R6 is an aliphatic group such as straight and branched alkylene groups containing 1 to 8 carbons; and (c) a metal dithiocarbamate formula (IV) wherein R13 and R14 represent branched and straight chain alkyl groups having 1 to 8 carbon atoms, M is a metal cation and n is an Integer based upon the valency of the metal cation wherein the amount of (1) is form about 0.1-1.0% by weight, the amount of (2) is from about 0.1-5.0% by weight and the amount of (3) is from 0.05-2.5% by weight, based on the total weight of the composition.