Composite Coloring Composition for Inkjet Stability and Fastness

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Solution Overview

Problem

Current inkjet recording methods face challenges in achieving high color saturation, adhesion, light fastness, ozone fastness, and moisture resistance while maintaining jetting stability, particularly in the dye field.

Innovation Solution

A coloring composition combining a compound represented by Formula (1) and an azo compound represented by Formula (D) is used, with specific alkyl and ionic hydrophilic groups, to enhance adhesion and image fastness without compromising inkjet stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If dye concentration is increased to improve color saturation and adhesion, then printing density improves, but jetting stability deteriorates

Engineering Contradiction:

Improveprinting densityVSAvoidjetting stability

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The patent combines a xanthene compound (Formula 1) with an azo compound (Formula D) to create a composite coloring composition. This composite approach allows achieving high printing density and color saturation without requiring excessive total dye concentration, thereby maintaining jetting stability. The synergistic effect of the two different coloring agent mother nuclei enables both high image quality and stable ink jetting performance.

Inventive Principle:

Principle #40Composite materials

2Manufacturing precision

If high dye concentration is used to achieve excellent color saturation and adhesion, then image quality improves, but light fastness and ozone fastness deteriorate

Engineering Contradiction:

Improvecolor saturationVSAvoidlight fastness

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

By combining xanthene compound (Formula 1) and azo compound (Formula D) in specific proportions, the patent achieves high color saturation while maintaining excellent light fastness. The physicochemical interaction between these two different coloring agent mother nuclei prevents deterioration of light fastness even at optimized dye concentrations, resolving the contradiction between color saturation and light fastness.

Inventive Principle:

Principle #40Composite materials

3Manufacturing precision

If high dye concentration is used to improve adhesion, then printing density improves, but moisture resistance deteriorates

Engineering Contradiction:

ImproveadhesionVSAvoidmoisture resistance

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent utilizes the composite structure of xanthene compound (Formula 1) and azo compound (Formula D) to achieve high adhesion and printing density while maintaining moisture resistance. The specific combination of these two coloring agents with different molecular characteristics provides both strong adhesion to the recording medium and resistance to moisture, eliminating the trade-off between adhesion and moisture resistance.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentEP3421549B1Coloring composition, inkjet recording ink, inkjet recording method, and inkjet printer cartridge

Publication Date: 2023.08.16 FUJIFILM CORP

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AI summary

Provided are a coloring composition including a compound represented by Formula (1) shown in this specification and a compound represented by Formula (D) shown in this specification, an ink jet recording ink including the coloring composition, an ink jet recording method using the ink jet recording ink, and an ink jet printer cartridge that is filled with the ink jet recording ink.