Process for preparing alpha-phase metal phtalocyanine pigments

This invention relates to a process for preparing alpha-phase metal phthalocyanine pigments from crude metal phthalocyanine pigments comprising (a) acid pasting or acid swelling a crude metal phthalocyanine pigment; (b) dry milling the precipitated metal phthalocyanine pigment in the presence of a s...

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Bibliographische Detailangaben
Hauptverfasser:	SATTAR, ABDUL, GERSON, HERMAN
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:	This invention relates to a process for preparing alpha-phase metal phthalocyanine pigments from crude metal phthalocyanine pigments comprising (a) acid pasting or acid swelling a crude metal phthalocyanine pigment; (b) dry milling the precipitated metal phthalocyanine pigment in the presence of a stabilizer (c) finishing the milled metal phthalocyanine pigment and (d) isolating the alpha-phase metal phthalocyanine pigment.