Mixed crystal pigments of the quinacridone series

Details Mixed crystal pigments of the quinacridone series Mixed crystal pigments of the quinacridone series

C - Chemistry, Metallurgy

09

B

C09B 48/00 (2006.01) C08K 5/3437 (2006.01) C09B 67/22 (2006.01)

Patent

CA 2244618

New quinacridone mixed crystal pigments consisting of a) from 85 to 99% by weight of unsubstituted .beta.-phase quinacridone of the formula (I) (see formula I) in which R1 and R2 are hydrogen atoms and b) from 1 to 15% by weight of one or more substituted quinacridones of the formula (I) in which the substituents R1 and R2 are identical or different and are chlorine, bromine or fluorine atoms or C1-C4 alkyl, C1-C4 alkoxy or carboxamido groups which can be substituted by C1-C6-alkyl groups, and R1 may additionally be hydrogen, are valuable quinacridones in the red-violet range.

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