C.I. PIGMENT YELLOW 74 (INSOLUBLE AZO PIGMENT), AND COLORING COMPOSITION USING SAME

World Intellectual Property Organization Patent

APP PUB NO WO-2013099730-A1
SERIAL NO

PCTJP2012082899

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Abstract

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Provided is a C.I. Pigment Yellow 74 which is an insoluble azo pigment and is characterized in that: the ratio (26.6°/11.7°) of a 26.6° peak diffraction intensity to an 11.7° peak diffraction intensity, in a Bragg angle (2θ±0.2°) measured by x-ray powder diffraction using a CuK α-ray, is 0.85-1.12; and the average primary particle diameter of crystalline particles thereof is 20-130nm. As a result, it is possible to provide a coloring composition that exhibits excellent dispersibility when used as a coloring agent, and favorable particle-diameter stability and storage stability, in comparison to conventional pigments. Furthermore, by using the coloring composition, it is also possible to achieve image formation (recording) that exhibits excellent clarity and transparency at a high level not attainable using the prior art.

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Patent Owner(s)

Patent OwnerAddress
DAINICHISEIKA COLOR CHEMJP〒1038383 東京都中央区日本橋馬喰町一丁目７番６号 TOKYO ?1038383

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Inventor(s)

Inventor Name Address
INOUE SHIGERU SAITAMA
MATSUZAKI SATORU OTA-KU TOKYO 145-8501
TAKAYAMA MASAHIRO OSAKA JAPAN OSAKA
HOSHINO RYO TOKYO JAPAN TOKYO METROPOLIS
NAGASATO SHIGEYUKI TOKYO

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