Highly running-endurant magnetic recording medium
US4818606A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Dec 2, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium comprising a nonmagnetic support having thereon a magnetic recording layer comprising a magnetic layer containing ferromagnetic metal powder wherein the magnetic metal powder has a BET specific surface area of not less than 40 m.sup.2 /g and the magnetic recording layer contains a fatty acid having a neutralization value of not more than 250, an ester of fatty acid and a carbon black having a DBP oil absorption of not less than 110 ml/100 g and an average particle size of not more than 60 m.mu.. The magnetic recording medium is improved on the electromagnetic conversion property as well as on the running endurance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.