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Title:
INTERMEDIATE CHEMICAL SUBSTANCE IN PIGMENT CRYSTAL PRODUCTION STAGE, PROCESS FOR PRODUCING PIGMENT CRYSTAL FROM THE SAME, AND CRYSTALLINE PIGMENT
Document Type and Number:
WIPO Patent Application WO/2006/028285
Kind Code:
A1
Abstract:
A process for producing pigment crystals which have an extremely high purity and have been regulated with respect to crystal form, particle diameter, susceptibility to aggregation, and dispersibility and which are necessary for obtaining a crystalline pigment advantageously usable in both a solid phase and a liquid phase. The process for pigment crystal production comprises using a reverse Diels-Alder reaction to obtain pigment crystals (S3) from a pigment precursor (S0) at least via a first displacement structure (S1) and a second displacement structure (S2) which are different from the pigment precursor (S0) and the pigment crystals (S3) and are different from each other.

Inventors:
ISHIKAWA TAKAYUKI (JP)
NAGASHIMA AKIRA (JP)
KAWABE MINAKO (JP)
SUGAMA SADAYUKI (JP)
Application Number:
PCT/JP2005/017004
Publication Date:
March 16, 2006
Filing Date:
September 08, 2005
Export Citation:
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Assignee:
CANON KK (JP)
ISHIKAWA TAKAYUKI (JP)
NAGASHIMA AKIRA (JP)
KAWABE MINAKO (JP)
SUGAMA SADAYUKI (JP)
International Classes:
C09B67/48; B41J2/01; B41M5/00; C09B7/10; C09B48/00; C09B67/52; C09D11/00; G03G9/09
Foreign References:
JP2003327588A2003-11-19
JP2004262820A2004-09-24
Other References:
SHADAN HOJIN SHIKIZAI KYOKAI: "Shikizai Kogaku Hand Book", 1989, ASAKURA SHOTEN, pages: 333, XP002998173
UNO H. ET AL: "Thioindigo precursor: control of polymorph of thioindigo", TETRAHEDRON LETTERS, vol. 45, no. 49, November 2004 (2004-11-01), pages 9083 - 9086, XP004627462
Attorney, Agent or Firm:
Okabe, Masao (Fuji Bldg. 2-3, Marunouchi 3-chome, Chiyoda-k, Tokyo 05, JP)
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