Modified gamma-quinacridone pigment

Details Modified gamma-quinacridone pigment Modified gamma-quinacridone pigment

1991-08-22

1993-06-29

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

106497, C09B 4800

Patent

active

052236242

ABSTRACT:
A new gamma quinacridone polytype having a yellowish-red color and a distinct X-ray diffraction pattern, said new form being prepared directly in high yield in pigmentary form by oxidation of 6,13-dihydroquinacridone in a basic dimethylsulfoxide medium.

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patent: 4857646 (1989-08-01), Jaffe
patent: 5093497 (1992-03-01), Schutze
Abstract Chem. Abstr. vol. 92 entry 112354z (1979) Japan 54-135821.
Abstract Chem. Abstr. vol. 113 entry 154271c (1990) German 3,834,748.

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