C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 67/22 (2006.01) C09B 67/00 (2006.01) C09B 67/10 (2006.01)
Patent
CA 2362088
The invention relates to a crimson-colored pigment composition containing 1,4- diketo-2,5-dihydro-3,6-diaryl-pyrrolo[3,4c]pyrrol and quinacridone pigments in separate crystalline phases, which show high coloring power and other excellent applicational properties. The inventive pigments can be used in printing inks, especially in printing inks for polychrome printed products. An essential component of the inventive pigment mixtures is 1,4-diketo-2,5- dihydro-3,6-di-(4'-chlorophenyl)-pyrrolo[3,4c]pyrrol or 2,9- dichloroquinacridone, which have been subjected to kneading with a crystalline inorganic salt and a neutral organic liquid. The invention also relates to a method for producing said pigment compositions, to their use in the production of printing inks and to the printing inks themselves.
L'invention concerne des mélanges de pigments pourpres, contenant des pigments 1,4-dicéto-2,5-dihydro-3,6-diaryl-pyrrolo[3,4c]pyrrole et quinacridone en phases cristallines individuelles et présentant un pouvoir colorant élevé ainsi que d'autres propriétés d'application excellentes. On peut utiliser les pigments selon l'invention dans des encres d'impression, en particulier dans des encres d'impression pour produits d'impression polychromes. Un constituant essentiel des mélanges de pigments selon l'invention est 1,4-dicéto-2,5-dihydro-3,6-di-(4'-chlorophényl)-pyrrolo[3,4c]pyrrole ou 2,9-dichloroquinacridone, ayant été soumis à un pétrissage avec un sel anorganique cristallin et un liquide organique neutre. L'invention concerne également un procédé pour la production de compositions de pigments, leur utilisation pour la production d'encres d'impression, ainsi que ces encres d'impression elles-mêmes.
Grandidier Yves
Hauser Hanspeter
Ruf Klaus
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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