公开(公告)号：CA2565700A1

公开(公告)日：2006-01-05

申请号：CA2565700

申请日：2005-06-28

Applicant: CANON KK

Inventor： KITAMURA YUI ,  SANADA MIKIO ,  OGASAWARA MASASHI ,  WATANABE TOMONARI ,  TAKIZAWA YOSHIHISA ,  SUGAMA SADAYUKI ,  HAKAMADA SHINICHI ,  NITO YASUHIRO ,  IWATA TETSU ,  IMAI TAKASHI

IPC: C09D11/00 ,  B41J2/01 ,  B41M5/00

Abstract: Disclosed is an aqueous ink comprising at least water, a plurality of water-soluble organic solvents and a coloring material. The coloring material is a pigment, and, it contains a pigment particle having at least one ionic group bonded to a surface of the pigment particle directly or via another atomic group. The plurality of water-soluble organic solvents have a good medium or good mediums for the pigment and a poor medium or poor mediums for the pigment. The poor medium does not solvate perfectly or substantially the pigment. The ionic group undergoes perfectly or substantially no ionic dissociation in the poor medium. Also, among the respective Ka values of the plurality of water-soluble organic solvents as determined by the Bristow method, the Ka value of the poor medium is maximum.

公开(公告)号：CA2565700C

公开(公告)日：2010-05-04

申请号：CA2565700

申请日：2005-06-28

Applicant: CANON KK

Inventor： KITAMURA YUI ,  SANADA MIKIO ,  TAKIZAWA YOSHIHISA ,  OGASAWARA MASASHI ,  WATANABE TOMONARI ,  IMAI TAKASHI ,  NITO YASUHIRO ,  IWATA TETSU ,  HAKAMADA SHINICHI ,  SUGAMA SADAYUKI

IPC: C09D11/00 ,  B41J2/01 ,  B41M5/00

Abstract: Disclosed is an aqueous ink comprising at least water, a plurality of water-soluble organic solvents and a coloring material. The coloring material is a pigment, and, it contains a pigment particle having at least one ionic group bonded to a surface of the pigment particle directly or via another atomic group. The plurality of water-soluble organic solvents have a good medium or good mediums for the pigment and a poor medium or poor mediums for the pigment. The poor medium does not solvate perfectly or substantially the pigment. The ionic group undergoes perfectly or substantially no ionic dissociation in the poor medium. Also, among the respective Ka values of the plurality of water-soluble organic solvents as determined by the Bristow method, the Ka value of the poor medium is maximum.

公开(公告)号：BRPI0511981A

公开(公告)日：2008-01-22

申请号：BRPI0511981

申请日：2005-06-28

Applicant: CANON KK

Inventor： KITAMURA YUI ,  SANADA MIKIO ,  TAKIZAWA YOSHIHISA ,  OGASAWARA MASASHI ,  WATANABE TOMONARI ,  IMAI TAKASHI ,  NITO YASUHIRO ,  IWATA TETSU ,  HAKAMADA SHINICHI ,  SUGAMA SADAYUKI

IPC: C09D11/00 ,  B41J2/01 ,  B41M5/00

Abstract: Disclosed is an aqueous ink comprising at least water, a plurality of water-soluble organic solvents and a coloring material. The coloring material is a pigment, and, it contains a pigment particle having at least one ionic group bonded to a surface of the pigment particle directly or via another atomic group. The plurality of water-soluble organic solvents have a good medium or good mediums for the pigment and a poor medium or poor mediums for the pigment. The poor medium does not solvate perfectly or substantially the pigment. The ionic group undergoes perfectly or substantially no ionic dissociation in the poor medium. Also, among the respective Ka values of the plurality of water-soluble organic solvents as determined by the Bristow method, the Ka value of the poor medium is maximum.

公开(公告)号：EP1764396A4

公开(公告)日：2009-06-10

申请号：EP05755739

申请日：2005-06-28

Applicant: CANON KK

Inventor： KITAMURA YUI ,  SANADA MIKIO ,  TAKIZAWA YOSHIHISA ,  OGASAWARA MASASHI ,  WATANABE TOMONARI ,  IMAI TAKASHI ,  NITO YASUHIRO ,  IWATA TETSU ,  HAKAMADA SHINICHI ,  SUGAMA SADAYUKI

IPC: C09D11/00 ,  B41J2/01 ,  B41M5/00

CPC classification number: C09D11/326

Abstract: Disclosed is an aqueous ink containing water, a plurality of water-soluble organic solvents and a colorant. The colorant is composed of a pigment, and at least one ionic group is bonded to the surface of a pigment particle directly or via an other atomic group. The water-soluble organic solvents contain a good solvent and a poor solvent for the pigment. The poor solvent does not solvate the pigment at all or does not substantially solvate the pigment. The ionic group is not dissociated at all or is not substantially dissociated in the poor solvent. Furthermore, a poor solvent has the largest Ka value, which is determined by the Bristow method, among the water-soluble organic solvents.