Lubricant base oil
AssigneeKao Corporation
InventorKazuhiro Matsumura
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Abstract
A lubricant base oil of the present invention includes an ester compound including: a structural moiety (A) that is derived from an alcohol compound (A); and a structural moiety (B) that is derived from a carboxylic acid, the structural moiety B including: a structural moiety (B1) that is derived from a monocarboxylic acid (B1); and a structural moiety (B2) that is derived from an aliphatic monocarboxylic acid (B2) having 4 or more and 18 or less carbon atoms. According to the present invention, it is possible to provide a lubricant base oil having excellent low-temperature stability and high heat resistance while maintaining torque-lowering properties.
Claims18
A lubricant base oil comprising an ester compound including:
- a structural moiety (A) that is derived from an alcohol compound (A) represented by a general formula (1) below;
- and a structural moiety (B) that is derived from a carboxylic acid, the structural moiety B including:
- a structural moiety (B1) that is derived from a monocarboxylic acid (B1) represented by a general formula (2) below;
- and a structural moiety (B2) that is derived from an aliphatic monocarboxylic acid (B2) having 4 or more and 18 or less carbon atoms,
- wherein R1 is a hydroxy group, and R2 to R4 are independently a hydroxy group, a hydrogen atom, or a saturated hydrocarbon group having 1 or more and 3 or less carbon atoms,
- wherein any one of R5 to R9 is a carboxyl group, —CH2—COOH, or —CH2—CH2—COOH, and others are each independently a hydrogen atom, a hydroxy group, or a saturated hydrocarbon group having 1 or more and 10 or less carbon atoms, and
- wherein a proportion of the structural moiety (B1) in the structural moiety (B) is 0.1 mol % or more and 5 mol % or less.
Dependencies are inferred from the claim text.