Magnetic recording medium
US5512373A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1994 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Mar 9, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The problem of rusting relating to a magnetic recording medium composed of a non-magnetic base and a magnetic recording layer of a ferromagnetic metal layer formed thereon is overcome by a magnetic recording medium comprising a non-magnetic support, a ferromagnetic metal thin film as a magnetic recording layer and a lubricating layer, wherein the lubricating layer contains a mixture of a first lubricant having a polar perfluoro radial and a second lubricant expressed by the following formula: ##STR1## where R is a divalent radical having 2 or fewer carbons atoms; PA1 D is a polar radical selected from phosphorus-containing radical, hydroxyl, carboxyl and esterified carboxyl; PA1 R.sup.1 is selected from F, CF.sub.3 and C.sub.2 F.sub.5 ; and PA1 R.sup.2 and R.sub.3 are selected from F, CF.sub.3 and C.sub.2 F.sub.5, CF(CF.sub.3).sub.2 and C(CF.sub.3).sub.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.