Colored Resin Particle Dispersion Abrasion Resistance
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Solution Overview
Problem
Existing methods for producing polymer particle dispersions struggle with achieving satisfactory abrasion resistance, water resistance, and marker resistance in printed images, and the stability of these dispersions is challenging, especially when stored under high-temperature conditions, leading to potential changes in color tone.
Innovation Solution
A colored resin particle dispersion is developed, comprising colored resin particles, a basic dispersant, and a non-aqueous solvent, where the particles include a colorant, a solid resin, and a liquid organic compound with an acidic group, maintaining an oxidation-reduction potential of 300 mV or less to enhance stability and prevent color tone changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin is used to improve abrasion resistance, water resistance and marker resistance, then the image quality is improved, but the dispersion stability deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the oxidation-reduction potential within a specific range (300-600 mV) and adjusting the glass transition temperature of the resin (30-150°C). These parameter optimizations enable the resin to provide both improved abrasion resistance and maintained dispersion stability, resolving the technical contradiction between image quality and dispersion stability.
2Reliability
If a resin with high glass transition temperature is used to improve abrasion resistance, then the image quality is improved, but the dispersion stability at high temperature deteriorates
Solution Approach 1:
The patent optimizes the glass transition temperature parameter within the range of 30-150°C to achieve the desired balance. By selecting resins with appropriate Tg values and controlling the oxidation-reduction potential, the formulation maintains both abrasion resistance and high-temperature dispersion stability, resolving the contradiction between these two properties.
3Reliability
If the colorant amount is increased to improve color development, then the image density is improved, but the viscosity increases making dispersion preparation difficult
Solution Approach 1:
The patent controls the oxidation-reduction potential parameter (300-600 mV) which influences the interaction between colorant and resin. This parameter optimization allows for effective color development while maintaining manageable viscosity levels during dispersion preparation, resolving the contradiction between image density and ease of manufacture.
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 provides excellent abrasion resistance, prevents color tone changes, and improves the stability and uniformity of the dispersion, ensuring consistent color reproduction even under varying storage conditions.
Implementation Method 1
a liquid organic compound having an acidic group... a basic dispersant... the oxidation-reduction potential of the colored resin particle dispersion is 300 mV or less
Data Source
AI summary
A colored resin particle dispersion and an ink are provided which yield excellent abrasion resistance and prevent change in the color tone. Moreover, a colored resin particle dispersion and an inkjet ink are provided which exhibit excellent abrasion resistance, together with excellent water resistance and marker resistance. Specifically provided is a colored resin particle dispersion containing colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles include a colorant, a solid resin and a liquid organic compound having an acidic group, and the oxidation-reduction potential of the colored resin particle dispersion is 300 mV or less. Also provided is an inkjet ink containing this colored resin particle dispersion.