Lubricant, recording medium and carboxylic acid compound

Details Lubricant, recording medium and carboxylic acid compound Lubricant, recording medium and carboxylic acid compound

2008-01-29

2008-01-29

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S835700, C428S843400, C428S843500

Reexamination Certificate

active

07323260

ABSTRACT:
The present invention provides a lubricant capable of holding an excellent lubricating property under various types of service conditions, maintaining a lubricating effect for a long period of time and providing excellent traveling property, abrasion resistance, durability and the like, a recording medium using the lubricant and a carboxylic acid type compound constituting the lubricant. The lubricant is formed by using a carboxylic acid type compound having at least two carboxyl groups and one ester bond as represented by the following general formula (1) (for example, a compound as represented by the following chemical formula (1)) as a constituting mixture and, then, the thus-formed lubricant is allowed to be contained on or in a recording layer of the recording medium:in which Rf represents a non-substituted or substituted, saturated or unsaturated, fluorine-containing hydrocarbon group or hydrocarbon group; Es represents an ester bond; and R may be omitted or represent a non-substituted or substituted, saturated or unsaturated hydrocarbon group.

REFERENCES:
patent: 3124533 (1964-03-01), Metro et al.
patent: 4205085 (1980-05-01), Shepherd
Machine translation of Furuya et al., JP 2001-055593, Japan, Feb. 2001.
Machine translation of Darsow et al., JP 09-020704, Japan, Jan. 1997.
Machine translation of Kai et al., JP 06-041561, Japan, Feb. 1994.

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