Heat-stable iron oxide yellow pigments

Iron oxide pigment contains a specified amount of iron and has heat stability sufficient for coloring plastic films. Iron oxide pigment contains ≥ 58 wt.% iron and has a Silking index of ≤ 5. Color values at pigment volume concentrations of 10% in the test lacquer, are brightness (L asterisk ) of 54...

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Bibliographische Detailangaben
Hauptverfasser:	WILFRIED BUROW, WOLFGANG OEHLERT
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F CONCRETE CORRECTING FLUIDS DYES FILLING PASTES IMPREGNATING OR COATING OF PAPER INKS INORGANIC CHEMISTRY LIME, MAGNESIA METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES PREPARATION OF CARBON BLACK PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS REFRACTORIES SLAG TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES TREATMENT OF NATURAL STONE USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	Iron oxide pigment contains a specified amount of iron and has heat stability sufficient for coloring plastic films. Iron oxide pigment contains ≥ 58 wt.% iron and has a Silking index of ≤ 5. Color values at pigment volume concentrations of 10% in the test lacquer, are brightness (L asterisk ) of 54-65 CIELAB units, saturation (C asterisk ) of 38-65 CIELAB units and has red component (a asterisk ) of 8-15 CIELAB units, a yellow component (b asterisk ) of 37-55 CIELAB units and heat resistance for at least 5 minutes of ≥ 220 degrees C in polyethylene An Independent claim is also included for the preparation of a pigment, in which iron is dissolved by oxidizing metallic iron with nitrobenzene in an acid medium in presence of compounds of group III and IV.