Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1990-07-26
1992-06-09
Cooper, Jack
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
252 6256, 252 6258, 252 6259, 252 6262, 428694, B32B 516
Patent
active
051206048
ABSTRACT:
Disclosed herein are acicular magnetic iron oxide particles coated with double coating layers consisting of a Co compound layer as a lower layer and a spinel-type ferrite layer containing Mn-Zn, Ni-Zn or Mn-Ni-Zn as an upper layer, a process for producing the acicular magnetic iron oxide particles, and magnetic recording media produced by coating a substrate with a resin composition containing the acicular magnetic iron oxide particles.
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Smit, et al., "Ferrites" 1959 Philips' Technical Library, Eindhoven, The Netherlands, pp. 136-139.
Manslik, et al., "Ferric Oxide Particles . . . ", Chemmical Abstracts 106: 206526s (1987) Jun., No. 24, Columbus, Ohio, p. 696.
Cooper Jack
Toda Kogyo Corporation
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