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Lubricant for Magnetic Recording Media

IP.com Disclosure Number: IPCOM000093200D
Original Publication Date: 1967-Jul-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Marchese, MA: AUTHOR

Abstract

Excessive frictional contact between magnetic recording media and magnetic read-write heads is undesirable. Friction causes signal distortion and signal noise. Friction also creates wear products which tend to have ..LAYOUT 4 deleterious effects on both the head and media.

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Lubricant for Magnetic Recording Media

Excessive frictional contact between magnetic recording media and magnetic read-write heads is undesirable. Friction causes signal distortion and signal noise. Friction also creates wear products which tend to have ..LAYOUT 4 deleterious effects on both the head and media.

The addition of highly stable poly tri halo alkyl methyl siloxane compounds to magnetic recording systems results in reduced friction between the media and the heads. The basic chemical structure of this type of compound is:

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Here X is an element selected from the group consisting of F, Cl and Br. N is an integer greater than two and n is any integer.

Degree of polymerization and molecular weight can be varied according to the viscosity desired. Complete halogen saturation of the terminal carbon in the alkyl group is responsible for the improved stability and resulting improved lubrication properties. A specific preferred siloxane is poly tri fluoro propyl methyl siloxane having the structure:

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This type of lubricant, incorporated into a magnetic composition before it is formed into recording media, results in diminished frictional contact. Alternatively, application of such a lubricant to the surface of a media or the contact surfaces of the drive system imparts suitable lubricity to the system.

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