Compositions – Magnetic – With wax – bitumen – resin – or gum
Patent
1978-09-21
1981-04-28
Edmundson, F.
Compositions
Magnetic
With wax, bitumen, resin, or gum
427220, 4272556, H01F 136, B05D 500
Patent
active
042644623
ABSTRACT:
A finely divided magnetite pigment such as is used in magnetic tapes is stabilized against oxidation by contact with a heterocyclic nitrogen compound such as morpholine, triazole, piperazine or substitution products thereof. The heterocyclic compound can be applied as a solution or in vapor form.
REFERENCES:
patent: 2914424 (1959-11-01), Murray
patent: 3795539 (1974-03-01), Dimino
patent: 3852069 (1974-12-01), Van Paeschen et al.
patent: 4073977 (1978-02-01), Koester et al.
Buxbaum Gunter
Hund Franz
Schroeder Gerhard
Stephan Bernd
Bayer Aktiengesellschaft
Edmundson F.
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