HEAT-STABLE IRON OXIDE YELLOW PIGMENTS
Pure-coloured iron oxide yellow pigments having a silking index of less than 5 a nd a heat resistance of greater than 220.degree.C in polyethylene for at least 5 minu tes are obtained by oxidation of metallic iron with nitrobenzene in an acid medium in th e presence of compounds of elements chosen f...
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Zusammenfassung: | Pure-coloured iron oxide yellow pigments having a silking index of less than 5 a nd a heat resistance of greater than 220.degree.C in polyethylene for at least 5 minu tes are obtained by oxidation of metallic iron with nitrobenzene in an acid medium in th e presence of compounds of elements chosen from main groups 3 and 4 of the periodi c table. |
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