Lubricating oil composition, lubrication method, and gear

3:

• The lubricating oil composition according to claim 1, wherein:
• the sulfur- and phosphorus-containing anti-wear agent is at least one selected from the group consisting of a compound represented by formula (1) and a compound represented by formula (2):
• R11 is a hydrogen atom, a hydroxy group, or a mercapto group;
• R12 and R13 are each independently a hydroxy group, a mercapto group, —X12—R14, or —X13—R15—X14—R16, provided that at least one of R12 and R13 is —X12—R14 or —X13—R15—X14—R16;
• X11, X12, X13, and X14 are each independently an oxygen atom or a sulfur atom, provided that at least one of X11, X12, X13, and X14 is a sulfur atom;
• R14 and R16 are each independently a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• R15 is a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• R21, R22, and R24 are each independently a hydrogen atom or a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• R23 is a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• R25 is an organic group or a nitrogen-containing group;
• and
• X21, X22, X23, and X24 are each independently an oxygen atom or a sulfur atom, provided that at least one of X21, X22, X23, and X24 is a sulfur atom.

4:

• The lubricating oil composition according to claim 3, wherein:
• R11 is a hydrogen atom or a hydroxy group;
• R12 and R13 are each independently a hydroxy group or —X13—R15—X14—R16, provided that at least one of R12 and R13 is —X13—R15—X14—R16;
• R15 is a hydrocarbon group having 1 or more and 4 or less carbon atoms;
• R16 is a hydrocarbon group having 6 or more and 10 or less carbon atoms;
• X11 is an oxygen atom;
• and
• X13 and X14 are each independently an oxygen atom or a sulfur atom, provided that at least one of X13 and X14 is a sulfur atom.

5:

• The lubricating oil composition according to claim 3, wherein:
• R21 and R22 are each independently a hydrocarbon group having 1 or more and 6 or less carbon atoms;
• R23 is a hydrocarbon group having 1 or more and 4 or less carbon atoms;
• R24 is a hydrogen atom or a hydrocarbon group having 1 or more and 4 or less carbon atoms;
• R25 is a carboxy group, an acyloxy group having an alkyl group having 1 or more and 4 or less carbon atoms, or an alkyl ester group having an alkyl group having 1 or more and 4 or less carbon atoms;
• X21 and X22 are each an oxygen atom;
• and
• X23 and X24 are each a sulfur atom.

6:

• The lubricating oil composition according to claim 2, wherein:
• the lubricating oil composition comprises at least one phosphoric acid ester selected from the group consisting of a compound represented by formula (3) and a compound represented by formula (4):
• R31 is a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• m31 is 1, 2, or 3;
• in the case where m31 is 2 or 3, plural R31's may be the same as or different from each other;
• R41 is a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• m41 is 1 or 2;
• and
• in the case where m41 is 2, plural R41's may be the same as or different from each other.

7:

• The lubricating oil composition according to claim 2, wherein:
• the lubricating oil composition comprising at least one polysulfide selected from the group consisting of a compound represented by formula (5) and a compound represented by formula (6):
• wherein, in the general formula (5),
• R51 and R52 are each independently a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• m51 is an integer of 2 or more and 10 or less;
• R61 and R63 are each independently a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• R62 is a hydrocarbon group having 1 or more and 24 or less carbon atoms;
• m61 and m62 are each an integer of 1 or more and 10 or less;
• and
• p61 is an integer of 1 or more and 8 or less.

11:

• A lubrication method, comprising lubricating an article or a substance with a lubricating oil composition comprising:
• a base oil containing at least a mineral oil;
• and
• a sulfur- and phosphorus-containing anti-wear agent,
• wherein a mass ratio (S/P ratio) of a sulfur atom and a phosphorus atom contained in the composition is 7.5 or more and 16 or less.

13:

• A gear, comprising a lubricating oil composition comprising:
• a base oil containing at least a mineral oil;
• and
• a sulfur- and phosphorus-containing anti-wear agent,
• wherein a mass ratio (S/P ratio) of a sulfur atom and a phosphorus atom contained in the composition is 7.5 or more and 16 or less.