Lubricant composition and magnetic recording medium using the same
AssigneesWako Pure Chemical Industries, Ltd., TDK Corporation
InventorsTsunehiko Ikarashi, Koji Kobayashi, Hiromichi Kanazawa, Takahiro Hayashi, Takehiko Iritani
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Abstract
A lubricant composition comprising (A) a compound of the formula: R1—COO—R2 wherein R1 is a higher aliphatic hydrocarbon residue and R2 is an aliphatic hydrocarbon residue which may contain fluorine atom(s) and/or oxygen atom(s), and (B) a compound of the formula: wherein R3 is a higher aliphatic hydrocarbon residue; R4 and R5 are independently a hydrogen atom or an aliphatic hydrocarbon residue which may contain fluorine atom(s) and/or oxygen atom(s), gives a lubricant layer in a magnetic recording medium having good running durability, still life and weather resistance.
Claims20
A lubricant composition comprising
- (A) a compound of the formula:
- R1—COO—R2 (1)
- wherein R1 is an aliphatic hydrocarbon residue having 6-24 carbon atoms and which may have one or more fluorine atoms;
- and R2 is an aliphatic hydrocarbon residue which may have one or more fluorine atoms or oxygen atoms or both, and
- (B) a compound of the formula:
- wherein R3 is an aliphatic hydrocarbon residue having 6 to 24 carbon atoms and which may have one or more fluorine atoms;
- and R4 and R5 are independently a hydrogen atom or an aliphatic fluorohydrocarbon residue which may have one or more oxygen atoms and represented by the formula:
- —R6—Y (3)
- wherein R6 is a methylene chain which may have one or more oxygen atoms;
- and Y is a fluoroalkyl group, provided that at least one of R4 and R5 is an aliphatic fluorohydrocarbon residue which may have one or more oxygen atoms.
A process according to claim 9, wherein the magnetic recording medium is a thin metal film magnetic recording medium.
Dependencies are inferred from the claim text.