Neue Chinacridone

1285610 Quinacridone pigments XEROX CORP 29 Oct 1969 [1 Nov 1968] 52998/69 Heading C4P The invention comprises the quinacridone pigments having the general formula wherein each R is CH 3 , C 2 H 5 , OCH 3 , OC 2 H 6 or halogen, and each R1 is COOCa/2, SO 3 H, or SO 2 Ca/2. The calcium salts are prep...

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Bibliographische Detailangaben
1. Verfasser:	WEINBERGER,LESTER
Format:	Patent
Sprache:	ger
Schlagworte:	ADHESIVES CHEMISTRY CINEMATOGRAPHY DYES ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY LAKES MAGNETOGRAPHY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PHOTOGRAPHY PHYSICS POLISHES
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Beschreibung
Zusammenfassung:	1285610 Quinacridone pigments XEROX CORP 29 Oct 1969 [1 Nov 1968] 52998/69 Heading C4P The invention comprises the quinacridone pigments having the general formula wherein each R is CH 3 , C 2 H 5 , OCH 3 , OC 2 H 6 or halogen, and each R1 is COOCa/2, SO 3 H, or SO 2 Ca/2. The calcium salts are prepared by reacting the corresponding free acid with CaO and the compound where R1 is SO 3 H is prepared by reacting a quinacridone of the formula where R is as above with formaldehyde and the compound in concentrated sulphuric acid. The pigments are used in electrophoretic imaging processes.