Perfluoropolyether compound, and lubricant and magnetic disk...

Details Perfluoropolyether compound, and lubricant and magnetic disk... Perfluoropolyether compound, and lubricant and magnetic disk...

2008-05-09

2011-10-18

Rickman, Holly (Department: 1785)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C508S422000

Reexamination Certificate

active

08039132

ABSTRACT:
A compound of the formula (I), and lubricant, and magnetic disk each using the samein-line-formulae description="In-line Formulae" end="lead"?A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A  (I)in-line-formulae description="In-line Formulae" end="tail"?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 C1-4fluoroalkyl, Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2—, x, y and z being each a real number of 0 to 50.

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P. H. Kasai, “Perfluoropolyethers: Intramolecular Disproportionation”, Macromolecules, vol. 25, No. 25, pp. 6791-6799, 1992.

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