Grease composition
AssigneeNippon Grease Co., Ltd.
InventorsSatoshi Doi, Akihiro Yamamoto, Jusei Maeda
Life of this patent
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Abstract
An object of the present invention is to provide a grease composition which has little influence on the environment and has good rust prevention and water resistance against salt water such as sea water. The grease composition comprises a biodegradable base oil and a rust-preventive agent comprising a calcium sulfonate complex and a sorbitan fatty acid ester, wherein a total content of biodegradable organic substances in the grease composition is 75% by mass or more, and wherein a content of the rust-preventive agent is 2.5 to 30% by mass.
Claims11
A grease composition, comprising:
- a biodegradable base oil, a thickener, and a rust-preventive agent, which is a calcium sulfonate complex and a sorbitan fatty acid ester,
- wherein the biodegradable base oil comprises one or more selected from the group consisting of a synthetic ester oil and a vegetable oil,
- wherein a total content of biodegradable organic substances in the grease composition is 75% by mass or more,
- a content of the rust-preventive agent is 4.5 to 20% by mass,
- a content of the calcium sulfonate complex with respect to the sorbitan fatty acid ester (a content of the calcium sulfonate complex/a content of the sorbitan fatty acid ester) is 0.5 to 5.0,
- the thickener is one or more selected from the group consisting of a lithium soap, a urea-based compound, and a lithium composite soap and
- a content of the thickener is 5.0 to 20% by mass,
- a worked penetration of the grease composition is 220 to 340,
- the biodegradable organic substance is one or more selected from the group consisting of a base oil, a sorbitan fatty acid ester, an ester-based rust-preventive agent, a wax, and a tackiness agent, and
- the biodegradable organic substances have a biodegradability of 60% or more by, microorganisms, conforming to the OECD test guideline 301B.
A grease composition, comprising:
- a biodegradable base oil, a biodegradable wax, a tackiness agent, and a rust-preventive agent, which is a calcium sulfonate complex and a sorbitan fatty acid ester,
- wherein the biodegradable base oil comprises one or more selected from the group consisting of a synthetic ester oil and a vegetable oil,
- wherein a total content of biodegradable organic substances in the grease composition is 75% by mass or more,
- a content of the rust-preventive agent is 4.5 to 20% by mass,
- a content of the calcium sulfonate complex with respect to the sorbitan fatty acid ester (a content of the calcium sulfonate complex/a content of the sorbitan fatty acid ester) is 0.5 to 5.0,
- the wax is one or more selected from the group consisting of a rice wax, a carnauba wax, a candelilla wax, a microcrystalline wax, and a paraffin wax,
- a content of the biodegradable wax in a total amount of the biodegradable base oil and the biodegradable wax is 6.0 to 40% by mass,
- a content of the tackiness agent is 1.0 to 25% by mass,
- the biodegradable organic substance is one or more selected from the group consisting of a base oil, a sorbitan fatty acid ester, an ester-based rust-preventive agent, a wax, and a tackiness agent, and
- the biodegradable organic substances have a biodegradability of 60% of more by microorganisms, conforming to the OECD test guideline 301B, and
- a melting point of the grease composition is 50° C. to 100° C.
Dependencies are inferred from the claim text.