METHOD OF TREATMENT OF FERRIC GAMMA-OXIDE-BASED DISPERSED PRODUCT

An iron oxide pigment having a coating of a silane of the formula RnSi(OR')4-n wherein R is an, in some cases, branched or oxygen-bridge-containing alkyl or alkenyl moiety of 1 to 18 carbon atoms, or an aryl moiety, R' is an, in some cases, branched and, in some cases, oxygen-bridge-contai...

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Bibliographische Detailangaben
Hauptverfasser: EDUARD SHENAFINGER,DT, KLAUS-DITRIKH ZEJLER,DT, MANFRED OLINGER,DT, GELMUT YAKUSH,DT, OTTO AMBROS,DT, YURGEN AMORT,DT, PAUL DEJGNER,DT, GEJNTS NESTLER,DT
Format: Patent
Sprache:eng
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Zusammenfassung:An iron oxide pigment having a coating of a silane of the formula RnSi(OR')4-n wherein R is an, in some cases, branched or oxygen-bridge-containing alkyl or alkenyl moiety of 1 to 18 carbon atoms, or an aryl moiety, R' is an, in some cases, branched and, in some cases, oxygen-bridge-containing alkyl moiety of 1 to 8, n=1 to 3, or a hydrolysis product thereof; a magnetic tape containing such coated iron oxide pigment and a process for coating such iron oxide pigment. There is particularly disclosed the treatment of iron oxide magnetic pigments to thereby improve their wear resistance and dispersibility in organic mediums.