Lubricant Composition
AssigneeNok Klueber Co., Ltd.
InventorsTetsuhiro MIYAMOTO, Akihiko Shimura, Toshio Nitta, Jiro Yurimoto
Life of this patent
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Abstract
A lubricant composition which is suitable as a fluorine oil, fluorine grease, and which is excellent in stabilizability, as well as a lubricant composition which is suitable as a fluorine oil, fluorine grease, and which has excellent rust prevention properties while keeping a heat resistance.
Claims14
A method for improving heat resistance of a lubricating oil including at least a perfluoropolyether oil, comprising the steps of:
- preventing decomposition of the perfluoropolyether oil at high temperatures by dissolving a fluorine-containing diamide compound represented by the following Formula (I) in the perfluoropolyether oil and making a solution:
- wherein,
- Y represents an oxygen atom (O), sulfur atom (S), CO group, SO group, or SO2 group;
- k is an integer of 1 to 5;
- m is an integer of 1 to 10;
- and
- n is an integer of 2 or more;
- and wherein substituting positions of two substitutional groups possessed by each phenyl group may be any one of an ortho-position, meta-position, and para-position.
A method of reducing the rust generation rate of a first component having a sliding surface that engages a sliding surface of a second component where the sliding surface of the first component and the sliding surface of the second component move relative to each other comprising:
- providing a rust-preventing property to a lubricating oil including a perfluoropolyether oil by dissolving a fluorine-containing diamide compound represented by the following Formula (I) in the perfluoropolyether oil and making a solution and making a lubricant composition and applying the lubricant composition to the sliding surface of the first component and the sliding surface of the second component:
- wherein,
- Y represents an oxygen atom (O), sulfur atom (S), CO group, SO group, or SO2 group;
- k is an integer of 1 to 5;
- m is an integer of 1 to 10;
- and
- n is an integer of 1 or more;
- and wherein substituting positions of two substitutional groups possessed by each phenyl group may be any one of an ortho-position, meta-position, and para-position.
Dependencies are inferred from the claim text.