Inkjet composition, ink set, and dyeing method.

The inkjet composition with a compound of formula (1) and a sulfonic acid group dispersant stabilizes dispersion, addressing the chroma and color development issues of conventional fluorescent materials, achieving high-chroma red color and fluorescence properties.

JP7884713B2Active Publication Date: 2026-07-06SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SEIKO EPSON CORP
Filing Date
2022-08-31
Publication Date
2026-07-06

AI Technical Summary

Technical Problem

Conventional fluorescent coloring materials, such as C.I. Vat Red 41, exhibit a strong pink color and insufficient chroma and color development as red, and are challenging to stabilize in inkjet compositions.

Method used

An inkjet composition containing a compound represented by formula (1) with a dispersant having a sulfonic acid group, such as formalin condensates of aromatic sulfonic acids, stabilizes the dispersion and enhances storage stability, leading to high-chroma red color development and fluorescence properties.

Benefits of technology

The composition achieves improved storage stability, high-chroma red color development, and excellent fluorescence color reproducibility, with enhanced discharge stability and color reproducibility.

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Patent Text Reader

Abstract

To provide an ink jet composition with high chroma saturation in a red direction and excellent color developability of fluorescence.SOLUTION: An ink jet composition contains a compound represented by a Formula (1), a dispersant, and water. The dispersant contains a compound having a sulfonic acid group. In the Formula (1), R1 represents a hydrogen atom or a cyano group.SELECTED DRAWING: None
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Citation Information

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