Colored Resin Particle Dispersion with Silane Crosslinking
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Solution Overview
Problem
Existing polymer particle dispersions for inks lack stability and abrasion resistance, particularly when used in printing on paper, and require additional production steps, limiting the types of resins that can be used for improved performance.
Innovation Solution
A colored resin particle dispersion comprising colored resin particles with a colorant, a solid resin having alkoxy groups and/or polysilsesquioxane, and a basic dispersant in a non-aqueous solvent, which enhances abrasion resistance and storage stability, and is suitable for use in inkjet inks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional resins (styrene-maleic acid copolymer, polyvinylpyrrolidone) are used to form polymer particle dispersions, then the dispersion stability is improved through charge formation, but the abrasion resistance and rub fastness of the printed image deteriorate
Solution Approach 1:
The invention changes the chemical composition parameters of the resin by incorporating silane-modified components and specific functional groups that provide both charge for stability and crosslinking capability for abrasion resistance. This parameter change allows the resin to simultaneously achieve dispersion stability and image durability
Solution Approach 2:
The invention creates a composite resin system combining organic polymer components with silane modifications, forming a multi-component resin structure that integrates the benefits of charge-based stability with crosslinking-based abrasion resistance, resolving the contradiction between these two properties
2Strength
If resins providing improved abrasion resistance and water resistance are used, then the ink performance is improved, but the dispersion stability becomes problematic and the types of usable resins are limited
Solution Approach 1:
The invention modifies the resin's chemical parameters by introducing silane groups and controlling functional group content, enabling the resin to maintain solubility and dispersion stability while providing crosslinking capability for improved abrasion and water resistance
Solution Approach 2:
The silane-modified resin acts as an intermediary that bridges the contradiction between stability and resistance properties, providing charge-based stability in the dispersed state while enabling crosslinking-based resistance in the dried film state
3Reliability
If additional production steps are added to improve dispersion stability and abrasion resistance, then the performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The invention merges the functions of dispersion stabilization and abrasion resistance enhancement into a single resin component with dual functionality, eliminating the need for separate additives and reducing production steps while maintaining reliability
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 dispersion provides excellent abrasion resistance and storage stability, particularly at high temperatures, and maintains the stability of the inkjet ink, allowing for improved performance in printing applications without the need for additional modifications.
Implementation Method 1
a silane-modified resin component, and a crosslinking catalyst, wherein the silane-modified resin component has a silane crosslinking structure and a gel fraction of 5% or more
Implementation Method 2
forming a dispersion composed of a dispersed phase containing the organic solvent B and a resin and a continuous phase containing the organic solvent A
Implementation Method 3
removing the organic solvent B from the dispersion under reduced pressure or heating
Data Source
AI summary
A colored resin particle dispersion and an ink are provided which exhibit excellent abrasion resistance of the printed items and excellent storage stability of the dispersion. Specifically provided is a colored resin particle dispersion comprising colored resin particles containing a colorant and a solid resin, a basic dispersant, and a non-aqueous solvent, wherein the solid resin is a resin having alkoxy groups and/or a polysilsesquioxane. The resin having alkoxy groups preferably has methoxy groups and/or ethoxy groups. Further, the resin having alkoxy groups preferably contains at least one of a polyamide resin having methoxymethyl groups, a methoxypolysilsesquioxane and an ethoxypolysilsesquioxane.