Polymorph of a yellow diarylide pigment

Details Polymorph of a yellow diarylide pigment Polymorph of a yellow diarylide pigment

C - Chemistry, Metallurgy

09

B

C09B 31/11 (2006.01) C09B 41/00 (2006.01) C09B 67/00 (2006.01)

Patent

CA 2197389

The present invention provides a novel polymorphic form of Colour Index Pigment Yellow 12 in a crystalline form which exhibits an X-ray diffraction pattern having three prominent X-ray diffraction lines corresponding to "d" spacings of 11.82, 7.71 and 3.32 x 10 -10 metres.

La présente invention revendique un nouvelle forme polymorphique de pigment Colour Index Jaune 12 sous une forme cristalline présentant un profil de diffraction des rayons X à trois lignes prononcées de diffraction X correspondant à des espacements "d" de 11,82, 7,71 et 3,32 x 10-10 mètres.

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