Azo pigment, method for producing the azo pigment, and...

Details Azo pigment, method for producing the azo pigment, and... Azo pigment, method for producing the azo pigment, and...

C - Chemistry, Metallurgy

09

B

C09B 33/12 (2006.01) C09B 67/20 (2006.01) C09B 67/46 (2006.01) C09B 67/48 (2006.01)

Patent

CA 2738691

An object of the invention is to provide an azo pigment having extremely good dispersibility and dispersion stability and having excellent hue and tinctorial strength and, preferably, having a long axis observed with a transmission microscope of from 0.01 µm to 30 µm. An azo pigment which is represented by the following formula (1) and having characteristic peaks at Bragg angles (20~0.2°) of (i) 7.6° and 25.6°, (ii) 7.0°, 26.4°, and 27.3°, or (iii) 6.4°, 26.4°, and 27.2° in X-ray diffraction with characteristic Cu K.alpha. line, or a tautomer thereof: (see formula 1)

La présente invention concerne un pigment azoïque qui est particulièrement excellent en termes de dispersibilité et de stabilité de dispersion, et qui présente une bonne teinte et un pouvoir colorant élevé. De préférence, linvention porte sur un pigment azoïque qui possède une longueur dans la direction du grand axe de 0,01 µm à 30 µm lorsquil est observé sous un microscope de transmission. Linvention concerne en particulier un pigment azoïque représenté par la formule (1) qui présente des pics de diffraction de rayon X caractéristiques aux angles Bragg (2? ± 0,2o) de (i) 7,6o et 25,6o, (ii) 7,0o, 26,4o et 27,3o ou (iii) 6,4o, 26,4o et 27,2o en diffraction de rayon X avec une ligne CuKa caractéristique, ou un tautomère de celui-ci.

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