Perfluoropolyether compound, and lubricant and magnetic disk each using the same
AssigneeMoresco Corporation
InventorsTsuyoshi Shimizu, Kazunori Shirai, Nagayoshi Kobayashi
Life of this patent
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Abstract
A compound of the formula (I), and lubricant, and magnetic disk each using the same A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A (I) wherein n is an integer of 1 to 4, A is a group of the formula (a) below, and B is a group of the formula (b) below, p being 1 or 2, R being C1-4 fluoroalkyl, Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)nCF2CF2—, x, y and z being each a real number of 0 to 50.
Claims6
A compound of the formula (I)
- A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A (I)
- wherein n is an integer of 1 to 4, A is a group of the formula (a) below, and B is a group of the formula (b) below, p being 1 or 2, R being C1-4 fluoroalkyl, Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2—, x, y and z being each a real number of 0 to 50.
A lubricant containing a compound of the formula (I)
- A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A (I)
- wherein n is an integer of 1 to 4, A is a group of the formula (a) below, and B is a group of the formula (b) below, p being 1 or 2, R being C1-4 fluoroalkyl, Rf is —CF2O(CF2CF2O)x (CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)nCF2CF2—, x, y and z being each a real number of 0 to 50.
A magnetic disk having at least a recording layer and a protective layer formed over a substrate, and a lubricant layer provided over a surface of the resulting assembly and comprising a compound containing a perfluoropolyether structure, the disk having a compound of the formula (I) as the lubricant layer
- A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A (I)
- wherein n is an integer of 1 to 4, A is a group of the formula (a) below, and B is a group of the formula (b) below, p being 1 or 2, R being C1-4 fluoroalkyl, Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2—, x, y and z being each a real number of 0 to 50.
Dependencies are inferred from the claim text.