DIAZO COMPOUNDS, A PROCESS FOR THEIR PREPARATION AND THEIR USE AS COLORANTS

When a diamine of the formula in which n is 1 to 4, is bis-diazotized and the resulting bis-diazo compound is coupled with 2 moles of one or more coupling components of the formula in which R1 is hydrogen, chlorine, bromine, methyl or methoxy and R2 is hydrogen or, if R1 is hydrogen, also methyl or...

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Bibliographische Detailangaben
Hauptverfasser: KUEHNE, RUDOLF, HAMAL, HEINRICH
Format: Patent
Sprache:eng ; fre
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Zusammenfassung:When a diamine of the formula in which n is 1 to 4, is bis-diazotized and the resulting bis-diazo compound is coupled with 2 moles of one or more coupling components of the formula in which R1 is hydrogen, chlorine, bromine, methyl or methoxy and R2 is hydrogen or, if R1 is hydrogen, also methyl or ethyl, di?azo compounds are obtained which are colorants. Due to their high fastness to light and to migration and their heat stability and dispersibility, these compounds are useful for pigmenting high molecular weight materials, especially polyolefins.