Organometallic complex-antioxidant combinations, and concentrates and diesel fuels containing same

A composition comprising:

• (A) at least one copper complex derived from at least one aromatic Mannich compound and at least one copper reactant;
• and
• (B) at least one compound selected from the group consisting of:
• 4-t-butylcatechol;
• 2,6-di-t-butyl-4-(dimethylaminoethyl)phenol;
• 2,5-di-t-amylhydroquinone;
• 4-(hydroxymethyl)-2,6-di-t-butylphenol;
• 2,2.sup.1 -methylenebis (4-methyl-6-cyclohexylphenol);
• 2,2-thio-bis(4-methyl-6-t-butyl phenol);
• 4-dodecyl-2-aminophenol;
• dinonyldiphenylamine;
• N,N.sup.1 -bis(dioctylphenyl)-p-phenylenediamine;
• phenyl-beta-naphthylamine;
• N-phenyl-N.sup.1 -(1-methylheptyl)-p-phenylenediamine;
• dioctylphenothiazine;
• dinonylphenoxazine;
• 2,6-tetramethyl-4-octylpiperidine;
• bis(2,2,6,6-tetramethyl-4-piperidinyl)sebaeate;
• trimethyldihydroquinoline;
• dodecylamine;
• and N-dodecyl-N-hydroxypropylamine.

A composition comprising:

• (A) at least one organocopper complex, said complex being derived from
• (i) at least one aromatic Mannich, said aromatic Mannich being the reaction product of
• (A-1) a hydroxy and/or thiol-containing aromatic compound having the formula ##STR137## wherein in Formula (A-1) Ar is an aromatic group;
• m is 1, 2 or 3;
• n is a number from 1 to about 4;
• each R.sup.1 independently is H or a hydrocarbyl group having from 1 to about 100 carbon atoms;
• R.sup.2 is H, amino or carboxyl;
• and X is O, S, or both when m is 2 or greater;
• (A-2) an aldehyde or ketone having the formula ##STR138## or a precursor thereof;
• wherein in Formula (A-2) R.sup.3 and R.sup.4 independently are H, saturated hydrocarbyl groups having from 1 to about 18 carbon atoms, and R.sup.4 can also be a carbonyl-containing hydrocarbyl group having from 1 to about 18 carbon atoms;
• and
• (A-3) an amine which contains at least one primary or secondary amino group;
• and
• (ii) at least one copper reactant capable of forming a complex with component (i);
• and
• (B) at least one antioxidant, said antioxidant being other than an oxime or a Schiff base.

A composition comprising:

• (A) at least one organocopper complex, said complex being derived from
• (i) at least one aromatic Mannich, said aromatic Mannich being the reaction product of
• (A-1) a hydroxy and/or thiol-containing aromatic compound having the formula ##STR139## wherein in Formula (A-1) Ar is an aromatic group;
• m is 1, 2 or 3;
• n is a number from 1 to about 4;
• each R.sup.1 independently is H or a hydrocarbyl group having from 1 to about 100 carbon atoms;
• R.sup.2 is H, amino or carboxyl;
• and X is O, S, or both when m is 2 or greater;
• (A-2) an aldehyde or ketone having the formula ##STR140## or a precursor thereof;
• wherein in Formula (A-2) R.sup.3 and R.sup.4 independently are H or saturated hydrocarbyl groups having from 1 to about 18 carbon atoms, and R.sup.4 can also be a carbonyl-containing hydrocarbyl group having from 1 to about 18 carbon atoms;
• and
• (A-3) an amine which contains at least one primary or secondary amino group, said amine being characterized by the absence of hydroxyl and/or thiol groups, the reaction between components (A-1), (A-2) and (A-3) being conducted at a temperature below about 120.degree. C.;
• and
• (ii) at least one copper reactant capable of forming a complex with component (i);
• and
• (B) at least one antioxidant.

A composition comprising:

• (A) at least one organocopper complex derived from (i) at least one aromatic Mannich compound and (ii) at least one copper reactant;
• and
• (B) at least one compound represented by the formula ##STR141## wherein in Formula (LXI):
• each of R.sup.1, R.sup.2 and R.sup.3 is independently H or an aliphatic hydrocaxbyl group, and
• each R.sup.4 is independently H, hydroxy, --R.sup.5 OH, --R.sup.6 CN or --CH(R.sup.7).sub.2, wherein each of R.sup.5 and R.sup.6 is independently a hydrocarbylene or hydrocarbylidene group and each R.sup.7 is independently H or an aliphatic hydrocarbyl group.