Magnetic recording medium

Stock material or miscellaneous articles – Structurally defined web or sheet – Weight per unit area specified

Reexamination Certificate

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Details

C428S421000, C428S690000, C428S690000

Reexamination Certificate

active

06969550

ABSTRACT:
There is provided a magnetic recording medium which exhibits superior lubricating properties and superior tape-transport properties as well as superior robustness even in a low-temperature environment. A magnetic layer containing a ferromagnetic metal is formed on a nonmagnetic support, and a protecting film is formed on the magnetic layer. A lubricant auxiliary coating composition comprising an aromatic alcohol is applied to the protecting film to form a lubricant auxiliary layer, and a lubricant coating composition comprising a compound represented by the formula (1) below is applied to the lubricant auxiliary layer to form a lubricant layer.in-line-formulae description="In-line Formulae" end="lead"?R1CH(COOR2)CH2COOR3  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein R1represents an aliphatic alkyl group, an aliphatic alkenyl group, or a hydrogen atom, and each of R2and R3independently represents a fluoroalkyl group, a fluoroalkenyl group, a fluoropolyether group, or a hydrogen atom.

REFERENCES:
patent: 4735848 (1988-04-01), Kondo et al.
patent: 5188747 (1993-02-01), Kai et al.
patent: 5492764 (1996-02-01), Okita et al.
patent: 5578387 (1996-11-01), Kai et al.
patent: 07-133253 (1995-05-01), None
patent: 2001-216662 (2001-08-01), None

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