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US 10,906,908 B2Granted
Ionic liquid, lubricating agent, and magnetic recording medium
AssigneeDexerials Corporation
InventorsHirofumi Kondo, Kouki Hatsuda, Nobuo Tano, Makiya Ito, Kyungsung Yun, Masayoshi Watanabe
Life of this patent
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Abstract
A lubricating agent including an ionic liquid formed from a Bronsted acid (HX) and a Bronsted base (B), wherein the Bronsted base has a linear hydrocarbon group having 10 or more carbon atoms and the difference between the pKa value of the Bronsted acid in water and the pKa value of the Bronsted base in water is 12 or more.
Claims20
An ionic liquid,
- wherein the ionic liquid is formed from a Bronsted acid (HX) and a Bronsted base (B),
- wherein the Bronsted base has a linear hydrocarbon group having 10 or more carbon atoms,
- wherein the ionic liquid is represented by the following General Formula (2) or (3),
- wherein the Bronsted acid is trifluoromethane sulfonic acid, a compound represented by the following Structural Formula (A), a compound represented by the following Structural Formula (B), a compound represented by the following Structural Formula (C), or a compound represented by the following Structural Formula (D), and
- wherein a difference between a pKa value of the Bronsted acid in water and a pKa value of the Bronsted base in water is 12 or more:
- wherein R11 denotes the linear hydrocarbon group having 10 or more carbon atoms and being attached to a carbon atom in a bicyclo ring,
- wherein R21 denotes the linear hydrocarbon group having 10 or more carbon atoms and being attached to a carbon atom or a nitrogen atom in a bicycle ring
4 more elements
An ionic liquid,
- wherein the ionic liquid is formed from a Bronsted acid (HX) and a Bronsted base (B),
- wherein the ionic liquid is represented by the following General Formula (2) or (3),
- wherein the Bronsted acid is trifluoromethane sulfonic acid, a compound represented by the following Structural Formula (A), a compound represented by the following Structural Formula (B), a compound represented by the following Structural Formula (C), or a compound represented by the following Structural Formula (D), and
- wherein a difference between a pKa value of the Bronsted acid in acetonitrile and a pKa value of the Bronsted base in acetonitrile is 6 or more:
- wherein R11 denotes a linear hydrocarbon group having 10 or more carbon atoms and being attached to a carbon atom in a bicyclo ring,
- wherein R21 denotes a linear hydrocarbon group having 10 or more carbon atoms and being attached to a carbon atom or a nitrogen atom in a bicyclo ring
3 more elements
A lubricating agent, comprising:
- an extreme pressure agent and,
- an ionic liquid formed from a Bronsted acid (HX) and a Bronsted base (B),
- wherein the Bronsted base has a linear hydrocarbon group having 10 or more carbon atoms,
- wherein the ionic liquid is represented by the following General Formula (2) or (3),
- wherein the Bronsted acid is trifluoromethane sulfonic acid, a compound represented by the following Structural Formula (A), a compound represented by the following Structural Formula (B), a compound represented by the following Structural Formula (C), or a compound represented by the following Structural Formula (D), and
- wherein a difference between a pKa value of the Bronsted acid in water and a pKa value of the Bronsted base in water is 12 or more:
- wherein R11 denotes the linear hydrocarbon group having 10 or more carbon atoms and being attached to a carbon atom in a bicyclo ring,
- wherein R21 denotes the linear hydrocarbon group having 10 or more carbon atoms and being attached to a carbon atom or a nitrogen atom in a bicyclo ring
5 more elements
A lubricating agent, comprising:
- an extreme pressure agent and,
- an ionic liquid formed from a Bronsted acid (HX) and a Bronsted base (B),
- wherein the ionic liquid is represented by the following General Formula (2) or (3),
- wherein the Bronsted acid is trifluoromethane sulfonic acid, a compound represented by the following Structural Formula (A), a compound represented by the following Structural Formula (B), a compound represented by the following Structural Formula (C), or a compound represented by the following Structural Formula (D), and
- wherein a difference between a pKa value of the Bronsted acid in acetonitrile and a pKa value of the Bronsted base in acetonitrile is 6 or more:
- wherein R11 denotes a linear hydrocarbon group having 10 or more carbon atoms and being attached to a carbon atom in a bicyclo ring,
- wherein R21 denotes a linear hydrocarbon group having 10 or more carbon atoms and being attached to a carbon atom or a nitrogen atom in a bicyclo ring
4 more elements
Dependencies are inferred from the claim text.