US 12,338,408 B2Granted

Lubricating oil composition

AssigneeEneos Corporation

InventorsYohei Susukida, Yasushi Onumata, Akira Tada, Noriko Ayame

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Abstract

A lubricating oil composition including: a lubricant base oil; (A) a calcium salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of calcium on the basis of the total mass of the composition; (B) a succinimide ashless dispersant in an amount of 0.005 to 0.25 mass % in terms of nitrogen on the basis of the total mass of the composition; (C) a nitrogen-containing antioxidant in an amount of 0.005 to 0.15 mass % in terms of nitrogen on the basis of the total mass of the composition; and optionally (D) a nitrogen-containing friction modifier in an amount of no more than 0.03 mass % in terms of nitrogen on the basis of the total mass of the composition, wherein a total content of any metallic detergent is 0.005 to 0.03 mass % in terms of metal on the basis of the total mass of the composition.

Claims17

Dependent claims

A lubricating oil composition consisting of:

a lubricant base oil;
and
at least three additives other than phosphoric acid, the at least three additives consisting of the following (i) and optionally (ii):
(i) at least three additives other than any nitrogen-containing friction modifier and other than any phosphoric acid, the (i) consisting of the following (i-1) and (i-2):
(i-1) an ashless dispersant consisting of a succinimide ashless dispersant in an amount of 0.005 to 0.25 mass % in terms of nitrogen on the basis of the total mass of the composition;
and
(i-2) at least two additives other than any ashless dispersant, the (i-2) consisting of:
at least one calcium salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of calcium on the basis of the total mass of the composition;
and
at least one nitrogen-containing antioxidant in an amount of 0.005 to 0.15 mass % in terms of nitrogen on the basis of the total mass of the composition;
and optionally one or more of:
(E) a phosphite ester compound;
and
(F) a tolyltriazole metal deactivator and/or a benzotriazole metal deactivator;
and
(ii) at least one nitrogen-containing friction modifier in an amount of no more than 0.001 mass % in terms of nitrogen on the basis of the total mass of the composition,
wherein a total content of any metallic detergent is 0.005 to 0.03 mass % in terms of metal on the basis of the total mass of the composition;
wherein an oxidatively deteriorated oil of the composition has a volume resistivity at 80° C. of no less than 1.0×109 106·cm, wherein the oxidatively deteriorated oil is obtained by oxidatively treating the composition for 150 hours by ISOT method conforming to JIS K2514-1;
and
wherein the succinimide ashless dispersant is a succinimide compound represented by the following general formula (2) or (3), or any combination thereof:
wherein in the general formula (2), R2 represents a C40-400 alkyl or a C40-400 alkenyl;
and b represents an integer of 1 to 5;
and the compound represented by the general formula (2) may be a combination of a plurality of compounds having different values of b;
and
wherein in the general formula (3), R3 and R4 each independently represent a C40-400 alkyl or a C40-400 alkenyl, and may be any combination of different groups;
and c is an integer of 0 to 4;
and the compound represented by the general formula (3) may be a mixture of a plurality of compounds having different values of c.

24 more elements

A lubricating oil composition consisting of:

a lubricant base oil;
and
at least three additives other than phosphoric acid,
the at least three additives consisting of the following (i) and (ii):
(i) at least two additives other than any ashless dispersant and other than phosphoric acid, the (i) consisting of
at least one calcium salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of calcium on the basis of the total mass of the composition;
at least one nitrogen-containing antioxidant in an amount of 0.005 to 0.15 mass % in terms of nitrogen on the basis of the total mass of the composition;
and
optionally at least one nitrogen-containing friction modifier in an amount of no more than 0.03 mass % in terms of nitrogen on the basis of the total mass of the composition;
and
(ii) an ashless dispersant, the (ii) consisting of a non-boron-containing succinimide ashless dispersant in an amount of 0.005 to 0.25 mass % in terms of nitrogen on the basis of the total mass of the composition,
wherein a total content of any metallic detergent is 0.005 to 0.03 mass % in terms of metal on the basis of the total mass of the composition;
wherein an oxidatively deteriorated oil of the composition has a volume resistivity at 80°° C. of no less than 1.0×109 Ω·cm, wherein the oxidatively deteriorated oil is obtained by oxidatively treating the composition for 150 hours by ISOT method conforming to JIS K2514-1;
and
wherein the non-boron-containing succinimide ashless dispersant is a succinimide compound represented by the following general formula (2) or (3), or any combination thereof:
wherein in the general formula (2), R2 represents a C40-400 alkyl or a C40-400 alkenyl;
and b represents an integer of 1 to 5;
and the compound represented by the general formula (2) may be a combination of a plurality of compounds having different values of b;
and
wherein in the general formula (3), R3 and R4 each independently represent a C40-400 alkyl or a C40-400 alkenyl, and may be any combination of different groups;
and c is an integer of 0 to 4;
and the compound represented by the general formula (3) may be a mixture of a plurality of compounds having different values of c.

19 more elements

A lubricating oil composition consisting of:

a lubricant base oil;
and
at least three additives other than phosphoric acid, the at least three additives consisting of the following (i) and (ii):
(i) a succinimide additive, the (i) consisting of a succinimide ashless dispersant in an amount of 0.005 to 0.25 mass % in terms of nitrogen on the basis of the total mass of the composition;
and
(ii) at least two additives other than any succinimide compound and other than phosphoric acid, the (ii) consisting of:
at least one calcium salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of calcium on the basis of the total mass of the composition;
at least one nitrogen-containing antioxidant in an amount of 0.005 to 0.15 mass % in terms of nitrogen on the basis of the total mass of the composition;
and
optionally at least one nitrogen-containing friction modifier other than any succinimide compound, in an amount of no more than 0.001 mass % in terms of nitrogen on the basis of the total mass of the composition,
wherein a total content of any metallic detergent is 0.005 to 0.03 mass % in terms of metal on the basis of the total mass of the composition;
wherein an oxidatively deteriorated oil of the composition has a volume resistivity at 80° C. of no less than 1.0×109 Ω·cm, wherein the oxidatively deteriorated oil is obtained by oxidatively treating the composition for 150 hours by ISOT method conforming to JIS K2514-1;
and
wherein the succinimide ashless dispersant is a succinimide compound represented by the following general formula (2) or (3), or any combination thereof:
wherein in the general formula (2), R2 represents a C40-400 alkyl or a C40-400 alkenyl;
and b represents an integer of 1 to 5;
and the compound represented by the general formula (2) may be a combination of a plurality of compounds having different values of b;
and
wherein in the general formula (3), R3 and R4 each independently represent a C40-400 alkyl or a C40-400 alkenyl, and may be any combination of different groups;
and c is an integer of 0 to 4;
and the compound represented by the general formula (3) may be a mixture of a plurality of compounds having different values of c.

18 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/289,961Filed 6 Nov 2019
Priority: JP 2018-2092556 Nov 2018
Published: US 2021/0395634 A123 Dec 2021
Granted: 24 Jun 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification41 codes

C10M 141/10
Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups…: at…
C10M 129/54
Having carboxyl groups bound to a carbon atom of a six-membered aromatic ring: containing hydroxy groups
C10M 133/12
Amines, e.g. polyalkylene polyamines; Quaternary amines: having amino groups bound to a carbon atom of a six-membered aromatic ring
C10M 133/44
Heterocyclic nitrogen compounds: five-membered ring containing nitrogen and carbon only