PREPARATION OF BETA QUINACRIDONE PIGMENTS

A novel method for the preparation of a beta quinacridone pigment is described by the oxidation of 6,13-dihydroquinacridone in the presence of polyvinyl pyrrolidone, a catalyst and optionally a particulate quinacridone or particle growth inhibitor using hydrogen peroxide as the oxidant.

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Bibliographische Detailangaben
1. Verfasser:	BAEBLER, FRIDOLIN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMISTRY DYES LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS POLISHES
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Beschreibung
Zusammenfassung:	A novel method for the preparation of a beta quinacridone pigment is described by the oxidation of 6,13-dihydroquinacridone in the presence of polyvinyl pyrrolidone, a catalyst and optionally a particulate quinacridone or particle growth inhibitor using hydrogen peroxide as the oxidant.