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Water-based ink for ink jet recording

A technology of inkjet recording and water-based ink, which can be used in inks, applications, household appliances, etc., and can solve problems such as problems with ejection stability

Active Publication Date: 2011-08-03
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the above-mentioned water-based inks with poor redispersibility, when the above-mentioned water-based inks evaporate and dry near the ink flow channel or nozzle of the inkjet head, there will be problems with the ejection stability

Method used

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  • Water-based ink for ink jet recording
  • Water-based ink for ink jet recording
  • Water-based ink for ink jet recording

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～25 and comparative example 1～17

[0043] Components other than the aqueous dispersion of self-dispersing carbon black in the water-based ink composition (Table 1 and Table 3) were uniformly mixed to obtain an ink solvent. Then, the ink solvent described above was added to the aqueous dispersion of self-dispersing carbon black and uniformly mixed. Thereafter, the resulting mixture was filtered with a cellulose acetate membrane filter (pore diameter: 3.00 μm) manufactured by Toyo Filter Paper Co., Ltd., thereby obtaining water-based inks for inkjet recording of Examples 1 to 25 and Comparative Examples 1 to 17.

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PUM

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Abstract

A water-based ink for ink jet recording, contains: a coloring agent; water; and a water-soluble organic solvent. The coloring agent contains a phosphate group-modified self-dispersing pigment. The water-based ink further contains at least one selected from the group consisting of boric acid, diglycolic acid, and a chelating agent.

Description

technical field [0001] The present invention relates to an aqueous ink for inkjet recording. Background technique [0002] In the aqueous ink for inkjet recording, self-dispersing pigments are sometimes used. Since the self-dispersing pigment does not require a polymer pigment dispersant, the viscosity of the water-based ink can be prevented from increasing, and the ejection stability and storage stability are excellent. The self-dispersing pigment can be obtained by treating the pigment so that at least one hydrophilic group such as a phosphoric acid group, a carboxylic acid group or a sulfonic acid group or a salt thereof is bonded to the pigment. Among these hydrophilic groups, especially self-dispersing pigments treated with phosphoric acid groups (hereinafter sometimes referred to as "phosphoric acid group-modified self-dispersing pigments"), can obtain better self-dispersing pigments than those treated with carboxylic acid groups or sulfonic acid groups. High optical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/02B41J2/175B41J2/01
CPCC09D11/324
Inventor 青山美千子古贺成美东山俊一津田政之左合宏充后藤数摩谷口晶彦
Owner BROTHER KOGYO KK
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