Lubricant composition using ionic liquid as a base oil and having excellent rust prevention properties
AssigneeKyodo Yushi Co., Ltd.
InventorsMakoto Hayama, Setsuo Sasaki
Life of this patent
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Abstract
The invention provides a lubricant composition containing (A) an ionic liquid having an anion represented by formula 1: (Rf1-SO2) (Rf2-SO2) N− or formula 2: (Rf3) (Rf3) (Rf3) PF3− wherein Rf1 and Rf2 in formula 1 may be the same or different and are each F, CF3, C2F5, C3F7 or C4F9, and Rf3 in formula 2 may be the same or different and is CF3, C2F5, C3F7 or C4F9; and (B) a fatty acid amine salt in an amount of 0.1 to 5.0 mass %. The lubricant composition of the invention can favorably be used under a high vacuum or an ultra high vacuum, or under high temperatures, and exhibits excellent rust prevention properties.
Claims8
A lubricant composition comprising;
- (A) an ionic liquid having an anion represented by formula 1 or formula 2:
- (Rf1-SO2) (Rf2-SO2) N− (formula 1)
- (Rf3) (Rf3) (Rf3) PF3− (formula 2)
- wherein Rf1 and Rf2 in formula 1 may be the same or different and are each F, CF3, C2F5, C3F7 or C4F9, and Rf3 in formula 2 may be the same or different and is CF3, C2F5, C3F7 or C4F9, and
- (B) a fatty acid amine salt in an amount of 0.1 to 5.0 mass %,
- wherein the ionic liquid has a melting point of −20° C. or less, and
- wherein the anion of the ionic liquid is at least one selected from the group consisting of bis(perfluoroalkylsulfonyl)imide, (trifluoromethylsulfonyl)(heptafluoropropylsulfonyl)imide, and tris(perfluoroalkyl)trifluorophosphate, and
- wherein the cation of the ionic liquid is at least one selected from the group consisting of ethylmethyl imidazolium, butyldimethyl imidazolium;
- and propyldimethyl isooxazolium.
The lubricant composition comprising:
- (A) an ionic liquid selected from the group consisting of:
- 1-butyl-2,3-dimethyl imidazolium bis(trifluoromethylsulfonyl)imide,
- 1-(2-methoxyethyl)-1-methyl pyrrolidinium bis(trifluoromethylsulfonyl)imide, triethyloctyl phosphonium bis(trifluoromethylsulfonyl)imide, and
- 1-ethyl-3-methyl imidazolium (trifluoromethylsulfonyl) (hepta-fluoropropylsulfonyl) imide, and
- (B) a fatty acid amine salt in an amount of 0.1 to 5.0 mass %.
Dependencies are inferred from the claim text.