A liquid blend of octylated phenyl-α-naphthylamine, and at least one low molecular weight aromatic ester, wherein the octylated phenyl-α-naphthylamine is present from about 15% to about 35% by weight of the blend, as well as a lubricating composition comprising a lubricant base and an amount of the blend which provides up to 2.0% by weight of the octylated phenyl-α-naphthylamine in the composition.

A lubricant composition is disclosed comprising an antioxidant composition and a lubricating oil. The antioxidant composition comprises a phenolic antioxidant having the following structure (I)

##STR00001##

and
a phosphite antioxidant having the following structure (II)

##STR00002##

wherein, A is a direct bond or an alkylene; X is —C(O)O—, —OC(O)—, —C(O)N(R.sub.7)—, —N(R.sub.7)C(O)—, —C(O)—, —N(R.sub.7)—, —O—, or —S—; R.sub.1 and R.sub.2 are each independently a C.sub.1-C.sub.10 alkyl, a C.sub.2-C.sub.10 alkenyl, a C.sub.2-C.sub.10 alkynyl, or a C.sub.3-C.sub.12 aryl; R.sub.3 includes a C.sub.1-C.sub.80 alkyl, a C.sub.2-C.sub.80 alkenyl, a C.sub.2-C.sub.80 alkynyl, or a C.sub.3-C.sub.12 aryl; R.sub.4, R.sub.5, and R.sub.6 are each independently hydrogen, alkyl, alkenyl, alkynyl, or aryl provided that at least one of R.sub.4, R.sub.5, and R.sub.6 is not hydrogen; R.sub.7 is H or an alkyl; and m, n, and o are each independently from 1 to 3.

A lubricant composition is disclosed comprising an antioxidant composition and a lubricating oil. The antioxidant composition comprises a phenolic antioxidant having the following structure (I)

##STR00001##

and
a phosphite antioxidant having the following structure (II)

##STR00002##

wherein, A is a direct bond or an alkylene; X is —C(O)O—, —OC(O)—, —C(O)N(R.sub.7)—, —N(R.sub.7)C(O)—, —C(O)—, —N(R.sub.7)—, —O—, or —S—; R.sub.1 and R.sub.2 are each independently a C.sub.1-C.sub.10 alkyl, a C.sub.2-C.sub.10 alkenyl, a C.sub.2-C.sub.10 alkynyl, or a C.sub.3-C.sub.12 aryl; R.sub.3 includes a C.sub.1-C.sub.80 alkyl, a C.sub.2-C.sub.80 alkenyl, a C.sub.2-C.sub.80 alkynyl, or a C.sub.3-C.sub.12 aryl; R.sub.4, R.sub.5, and R.sub.6 are each independently hydrogen, alkyl, alkenyl, alkynyl, or aryl provided that at least one of R.sub.4, R.sub.5, and R.sub.6 is not hydrogen; R.sub.7 is H or an alkyl; and m, n, and o are each independently from 1 to 3.

Provided is a grease composition which is excellent in fire extinguishing performance without water and can suppress fuming, malodor, and liquefaction on burning and a method for producing the grease composition. A grease composition contains a base oil (A), a thickener (B), and a fire retardant (C), wherein the base oil (A) contains a base oil (A1) having a 40° C. kinematic viscosity of 300 mm.sup.2/s or more, a sulfur content of 20 ppm by mass or less, and an initial boiling point of 400° C. or higher, the fire retardant (C) is at least one of aluminum hydroxide (C1) and 1,3,5-triazine-1,3,5 (2H, 4H, 6H)-tris(ethanol) (C2), and a content of the fire retardant (C) is 1.0 to 12.0 mass % based on a total amount of the grease composition.

Provided is a grease composition which is excellent in fire extinguishing performance without water and can suppress fuming, malodor, and liquefaction on burning and a method for producing the grease composition. A grease composition contains a base oil (A), a thickener (B), and a fire retardant (C), wherein the base oil (A) contains a base oil (A1) having a 40° C. kinematic viscosity of 300 mm.sup.2/s or more, a sulfur content of 20 ppm by mass or less, and an initial boiling point of 400° C. or higher, the fire retardant (C) is at least one of aluminum hydroxide (C1) and 1,3,5-triazine-1,3,5 (2H, 4H, 6H)-tris(ethanol) (C2), and a content of the fire retardant (C) is 1.0 to 12.0 mass % based on a total amount of the grease composition.

The present invention relates to a hydraulic fluid composition containing a base oil (A), an antioxidant (B) including an amine-based antioxidant (B1) and a phenol-based antioxidant (B2), and a succinimide-based compound (C), wherein the hydraulic fluid composition satisfies the following requirement (I): and is to be used for hydraulic equipment which is equipped with at least one of a wet type brake and a wet type clutch and which is selected from a construction machinery, a general industrial machinery, and a power generator, and in which a working pressure is 30 MPa or more. The hydraulic fluid composition is not only excellent in wear resistance and an effect for suppressing the sludge formation but also excellent in a braking performance or a clutch performance, even when used under a high-pressure condition.

Requirement (I): A static friction coefficient (μ.sub.s) after 1,000 cycles, as measured in conformity with the SAE No. 2 test described in JCMAS P 047:2004, is 0.100 to 0.162.

The present invention relates to a hydraulic fluid composition containing a base oil (A), an antioxidant (B) including an amine-based antioxidant (B1) and a phenol-based antioxidant (B2), and a succinimide-based compound (C), wherein the hydraulic fluid composition satisfies the following requirement (I): and is to be used for hydraulic equipment which is equipped with at least one of a wet type brake and a wet type clutch and which is selected from a construction machinery, a general industrial machinery, and a power generator, and in which a working pressure is 30 MPa or more. The hydraulic fluid composition is not only excellent in wear resistance and an effect for suppressing the sludge formation but also excellent in a braking performance or a clutch performance, even when used under a high-pressure condition.

Requirement (I): A static friction coefficient (μ.sub.s) after 1,000 cycles, as measured in conformity with the SAE No. 2 test described in JCMAS P 047:2004, is 0.100 to 0.162.

Engine oil \s and methods for use in soot-producing engines. The engine oil contains a major amount of a base oil and a dispersant reaction product of A) a hydrocarbyl-dicarboxylic acid or anhydride, and B) at least one polyamine, that is post-treated with C) an aromatic carboxylic acid, an aromatic polycarboxylic acid, or an aromatic anhydride, wherein all carboxylic acid or anhydride groups of C) are attached directly to an aromatic ring. A molar ratio of carboxyl groups from components A) and C) to nitrogen atoms from component B) of from 0.9 to 1.3 is used to make the dispersant which also has a molar ratio of component C) to component B) of at least 0.4 and when component B) has an average of 4-6 nitrogen atoms per molecule, a molar ratio of A) to B) is from 1.0 to 1.6.

Engine oil \s and methods for use in soot-producing engines. The engine oil contains a major amount of a base oil and a dispersant reaction product of A) a hydrocarbyl-dicarboxylic acid or anhydride, and B) at least one polyamine, that is post-treated with C) an aromatic carboxylic acid, an aromatic polycarboxylic acid, or an aromatic anhydride, wherein all carboxylic acid or anhydride groups of C) are attached directly to an aromatic ring. A molar ratio of carboxyl groups from components A) and C) to nitrogen atoms from component B) of from 0.9 to 1.3 is used to make the dispersant which also has a molar ratio of component C) to component B) of at least 0.4 and when component B) has an average of 4-6 nitrogen atoms per molecule, a molar ratio of A) to B) is from 1.0 to 1.6.

This invention relates to a liquid antioxidant composition which finds utility as an antioxidant additive in candle wax and lubricant compositions, and has an additional effect of preventing crystallization of the tolutriazole additive used in such compositions. In particular, the antioxidant composition is a combination of an alkylated diphenylamine derivative of tolutriazole with benzyl benzoate.