Invention Grant
- Patent Title: C.I. pigment yellow 74 (insoluble AZO pigment), and coloring composition using same
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Application No.: US14363180Application Date: 2012-12-19
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Publication No.: US09657176B2Publication Date: 2017-05-23
- Inventor: Ryo Hoshino , Shigeyuki Nagasato , Masahiro Takayama , Shigeru Inoue , Satoru Matsuzaki
- Applicant: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
- Current Assignee: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: JP2011-288579 20111228
- International Application: PCT/JP2012/082899 WO 20121219
- International Announcement: WO2013/099730 WO 20130704
- Main IPC: C09B51/00
- IPC: C09B51/00 ; G03G9/09 ; C09B67/00 ; C09D7/00 ; C09D11/322 ; C09B67/48

Abstract:
A C.I. Pigment Yellow 74 as an insoluble azo pigment is provided. This C.I. Pigment Yellow 74 is crystalline particles. The ratio (26.6°/11.7°) of a diffraction intensity of a peak at 26.6° to a diffraction intensity of a peak at 11.7° in terms of Bragg angle (2θ±0.2°) as measured by powder X-ray diffraction using CuK α-radiation is 0.85 to 1.12, and the average primary particle size is 20 to 130 nm. The use of this C.I. Pigment Yellow 74 as a colorant in a coloring composition enables to provide the coloring composition with excellent dispersibility and good particle size stability and storage stability compared with conventional pigments. The use of this coloring composition enables the formation (recording) of images having excellent clarity and transparency of such high levels that have not been achievable by conventional technologies.
Public/Granted literature
- US20140335358A1 C.I. PIGMENT YELLOW 74 (INSOLUBLE AZO PIGMENT), AND COLORING COMPOSITION USING SAME Public/Granted day:2014-11-13
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