Aqueous Ink Jet Composition Dispersion Stability
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Solution Overview
Problem
Ink jet compositions containing disperse dyes like C.I. Solvent Yellow 160:1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184 suffer from poor long-term dispersion stability and storage stability, leading to issues such as foreign material generation and nozzle clogging during ink ejection.
Innovation Solution
An aqueous ink jet composition comprising at least one dye selected from C.I. Solvent Yellow 160:1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184, combined with a material A (such as ethylene oxide adducts of tristyrylphenol or polyalkylene glycols) and an anionic dispersant, which improves dispersion stability and prevents foreign material generation and nozzle clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If disperse dyes or solvent dyes are used in ink jet composition, then coloring property is improved, but storage stability deteriorates due to inferior long-term dispersion stability
Solution Approach 1:
The patent introduces a specific dispersant as an intermediary substance to mediate between the dye particles and the aqueous medium. This dispersant forms a protective interface around the dye particles, preventing aggregation and maintaining stable dispersion over time, thus resolving the contradiction between good coloring properties and poor storage stability
Solution Approach 2:
The patent modifies the chemical composition parameters of the ink jet system by selecting specific dispersants with particular molecular structures and properties. By changing the dispersant type and concentration parameters, the system achieves both excellent coloring performance and long-term storage stability, transforming the unfavorable parameter combination into a favorable one
2Illumination intensity
If specific disperse dyes or solvent dyes are used, then yellow-base coloring property is improved, but foreign material generation increases during long-term storage
Solution Approach 1:
The dispersant acts as an intermediary that prevents direct interaction between dye particles and other ink components, reducing the formation of foreign materials. By maintaining physical separation and chemical stability through the dispersant layer, the system preserves yellow coloring intensity while minimizing foreign material generation during storage
3Illumination intensity
If disperse dyes or solvent dyes are used, then coloring capability is improved, but ejection stability deteriorates due to head filter clogging and nozzle clogging
Solution Approach 1:
The dispersant serves as a protective intermediary that prevents dye particle aggregation and adhesion to nozzle surfaces. This intermediary layer ensures smooth ink flow through the head filter and nozzles, maintaining ejection stability while preserving the coloring capability of the disperse or solvent dyes
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition ensures stable ink ejection over time, enhances the quality of recorded matter, and prevents adverse effects on sublimation dyeing, with improved storage stability and reduced foreign material generation.
Implementation Method 1
an anionic dispersant
Implementation Method 2
long-term dispersion stability
Data Source
AI summary
An aqueous ink jet composition of the present disclosure includes: at least one dye selected from the group consisting of C.I. Solvent Yellow 160:1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of an ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of a polyalkylene glycol; and an anionic dispersant.