Grease composition
AssigneeNippon Oil Co., Ltd.
InventorsTamio Akada, Akihiko Kominami, Mitsuru Kishimoto, Akira Kohno, Hirotsugu Kinoshita, Souichi Nomura, Takashi Arai, Kiyomi Sakamoto
Life of this patent
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Abstract
The grease composition of the present invention contains, in a lubricant base oil, 0.01 to 10% by mass of a fatty acid salt, 0.01 to 10% by mass of carbonate, 2 to 30% by mass of a thickener, and 0.1 to 20% by mass of a sulfur type extreme-pressure agent on the basis of the total amount of composition.
Claims3
A grease composition containing, in a lubricant base oil, on the basis of the total amount of composition:
- 0.01 to 10% by mass of a fatty acid salt;
- 0.01 to 10% by mass of carbonate;
- 2 to 30% by mass of at least one thickener selected from a metal soap, a complex metal soap, an urea compound, an urea/urethane compound, and an urethane compound;
- and
- 0.1 to 20% by mass of a sulfur type extreme-pressure agent;
- obtainable by mixing the above components;
- wherein the fatty acid salt and the carbonate are compounded as a mixture in which the carbonate is dispersed into the fatty acid salt, said mixture being obtained by blowing a carbonic acid gas into a system in which the fatty acid salt is dissolved in a carrier oil while a base exists therein.
A grease composition in a lubricant base oil, produced by the steps of:
- providing 0.01 to 10% by mass of a fatty acid salt;
- providing 0.01 to 10% by mass of a carbonate;
- providing 2 to 30% by mass of at least one thickener selected from a metal soap, a complex metal soap, an urea compound, an urea/urethane compound and an urethane compound;
- providing 0.1 to 20% by mass of a sulfur type extreme-pressure agent;
- and
- mixing the above components;
- wherein the fatty acid salt and the carbonate are compounded as a mixture in which the carbonate is dispersed into the fatty acid salt, said mixture being obtained by blowing a carbonic acid gas into a system in which the fatty acid salt is dissolved in a carrier oil while a base exists therein.
A method of preparing a grease composition in a lubricant base oil comprising the steps of:
- providing 0.01 to 10% by mass of a fatty acid salt;
- providing 0.01 to 10% by mass of carbonate;
- providing 2 to 30% by mass of at least one thickener selected from a metal soap, a complex metal soap, an urea compound, an urea/urethane compound, and an urethane compound;
- providing 0.1 to 20% by mass of a sulfur-type extreme-pressure agent;
- mixing the above components;
- compounding the fatty acid salt and the carbonate as a mixture in which the carbonate is dispersed into the fatty acid salt;
- and
- blowing a carbonic acid gas into a system in which the fatty acid salt is dissolved in a carrier oil while the base exists therein.
Dependencies are inferred from the claim text.