Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1986-02-04
1988-04-26
Lusignan, Michael R.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
51304, 427220, 428404, C09K 314, B05D 700, B32B 516, B32B 900
Patent
active
047404230
ABSTRACT:
When an abrasive having an oleophilic surface used in a magnetic recording medium obtained by subjecting an inorganic powder having a Mohs hardness of 5 or above and an average particle size of 2 .mu.m across or below to a dry contact treatment with a dispersing agent having an oleophilic group under grinding conditions giving an impact value of 1G or greater is used in combination with a magnetic powder as a magnetic recording layer of magnetic recording medium, the wear at a magnetic head can be prevented and still characteristics can be improved.
REFERENCES:
patent: 3619263 (1971-11-01), Bremer et al.
patent: 4330600 (1982-05-01), Kawasumi et al.
patent: 4379809 (1983-04-01), Matsufuji et al.
Kadokura Hidekimi
Murakami Hideaki
Umezaki Hiroshi
Lusignan Michael R.
Sumitomo Chemical Company Limited
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