PROCESS FOR AQUEOUS MILLING OF QUINACRIDONE PIGMENT

PROBLEM TO BE SOLVED: To provide an environmentally friendly process that does not produce large amounts of waste in the milling or recrystatlization and that allows the reduction in particle size in two isomorphous crystal phases ( and γ crystal phases) of quinacridones without destroying the cryst...

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Bibliographische Detailangaben
Hauptverfasser:	CAMPBELL COLIN DENNIS, HE YINGXIA, CARTER RHONDA, SCHILLING GORDIAN
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING GLASS HETEROCYCLIC COMPOUNDS INKS JOINING GLASS TO GLASS OR OTHER MATERIALS LAKES METALLURGY MINERAL OR SLAG WOOL MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an environmentally friendly process that does not produce large amounts of waste in the milling or recrystatlization and that allows the reduction in particle size in two isomorphous crystal phases ( and γ crystal phases) of quinacridones without destroying the crystal structure of a pigment.SOLUTION: A - or γ-quinacridone crude pigment is added to 2,9-dichloro-quinacridone as a crystal phase inhibitor. Moreover, organic pigments are isolated after milling the crude pigment in the presence of a styrene copolymer dispersants, a defoamer, an additive, and greater than about 10 wt.% of water.