Aqueous ink jet composition
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Solution Overview
Problem
Aqueous ink jet compositions containing disperse dyes like C.I. Disperse Yellow 54, C.I. Disperse Blue 359, and C.I. Disperse Red 60 suffer from poor storage stability and clogging issues in ink jet methods due to weak flocculation, leading to instability in long-term storage and discharge.
Innovation Solution
Incorporating a styrene maleic acid-based dispersing agent with specific molecular weight and ratio, along with an acetylene-based surfactant and anionic dispersing agent, to stabilize the disperse dyes and prevent weak flocculation, ensuring stable long-term storage and discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If disperse dyes (C.I. Disperse Yellow 54, C.I. Disperse Blue 359, C.I. Disperse Red 60) are used in aqueous ink jet composition, then color developing property is improved, but storage stability deteriorates and clogging occurs during discharge
Solution Approach 1:
A styrene maleic acid-based dispersing agent is introduced as an intermediary substance between the disperse dye and water. This dispersing agent has specific molecular structure characteristics (copolymer of styrene and maleic acid with particular graft ratios) that enable it to effectively stabilize the disperse dye particles, preventing flocculation and maintaining storage stability while allowing the dye to retain its excellent color developing properties
Solution Approach 2:
The patent changes the chemical parameters of the dispersing agent by controlling the graft ratio of maleic acid units in the styrene maleic acid copolymer. By adjusting this parameter (y/x ratio between 0.2-1.0), the patent optimizes the balance between storage stability and color developing property, resolving the contradiction between these two features
2Illumination intensity
If disperse dyes are used in aqueous ink jet composition, then color developing property is improved, but discharge stability deteriorates due to weak flocculation
Solution Approach 1:
The styrene maleic acid-based dispersing agent acts as a mediator that prevents weak flocculation of disperse dye particles. The specific copolymer structure with controlled graft ratio provides optimal steric and electrostatic stabilization, ensuring discharge stability while maintaining the dye's color developing properties
Solution Approach 2:
The patent creates a composite system combining disperse dye with styrene maleic acid copolymer dispersing agent. This composite approach leverages the synergistic effects of the dye and dispersing agent, where the dispersing agent's specific copolymer structure (with y/x ratio 0.2-1.0) provides enhanced stabilization that maintains both discharge stability and color developing property
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 solution effectively prevents weak flocculation and clogging, maintaining stable ink jet performance and quality over time, with improved storage stability and discharge efficiency.
Implementation Method 1
Incorporating a styrene maleic acid-based dispersing agent with specific molecular weight and ratio, along with an acetylene-based surfactant and anionic dispersing agent, to stabilize the disperse dyes and prevent weak flocculation
Implementation Method 2
Incorporating a styrene maleic acid-based dispersing agent with specific molecular weight and ratio, along with an acetylene-based surfactant and anionic dispersing agent, to stabilize the disperse dyes and prevent weak flocculation
Implementation Method 3
Incorporating a styrene maleic acid-based dispersing agent with specific molecular weight and ratio, along with an acetylene-based surfactant and anionic dispersing agent, to stabilize the disperse dyes and prevent weak flocculation
Data Source
AI summary
An aqueous ink jet composition contains at least one disperse dye selected from the group consisting of C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 359, and a styrene maleic acid-based dispersing agent represented by Formula (1).