Ink Composition Titanium Dioxide Metal Oxide Dispersion Stability
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Solution Overview
Problem
Existing ink compositions containing titanium dioxide particles face challenges with dispersion stability and jettability, particularly when used in ink jet techniques, due to the large particle diameter and high specific gravity of titanium dioxide.
Innovation Solution
An ink composition comprising titanium dioxide particles with an average particle diameter of 100 nm or greater, metal oxide particles with a smaller average diameter, and a dispersant, which improves the dispersibility and stability of the titanium dioxide particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If titanium dioxide particles are used as a white pigment in ink composition, then the concealability and visibility of recorded images are improved, but the dispersion stability deteriorates due to large particle diameter and high specific gravity
Solution Approach 1:
The patent introduces metal oxide particles (such as zinc oxide, aluminum oxide, or silicon oxide) with smaller particle diameters as intermediary substances. These metal oxide particles act as mediators that improve the dispersion stability of titanium dioxide particles in the ink composition. The metal oxide particles interact with the polymer dispersant to form a stable dispersion system, resolving the contradiction between maintaining titanium dioxide's optical properties and achieving stable dispersion.
Solution Approach 2:
The patent changes the particle diameter parameter of the white pigment system by combining titanium dioxide particles (larger diameter for good concealability) with metal oxide particles (smaller diameter for good dispersion stability). This parameter combination allows the ink composition to simultaneously achieve excellent concealability from the titanium dioxide and stable dispersion from the metal oxide particles, resolving the technical contradiction.
2Stability of the object's composition
If polymer dispersant is added to disperse titanium dioxide particles, then the dispersibility is improved, but the jettability deteriorates due to thickening of ink composition
Solution Approach 1:
The patent changes the particle size parameters of the pigment system by introducing metal oxide particles with smaller diameters (0.01-10 μm) compared to titanium dioxide particles (1-100 μm). This parameter change allows the use of lower amounts of polymer dispersant while maintaining good dispersibility, thereby reducing the thickening effect and improving jettability.
Solution Approach 2:
The patent creates a composite pigment system consisting of titanium dioxide particles and metal oxide particles. This composite material approach allows the metal oxide particles to assist in the dispersion process, reducing the burden on the polymer dispersant and minimizing the thickening effect on the ink composition, thus maintaining good jettability.
3Illumination intensity
If titanium dioxide particles with large particle diameter are used, then the concealability is improved, but the dispersion stability deteriorates
Solution Approach 1:
The patent segments the white pigment function into two components: titanium dioxide particles (1-100 μm) that provide concealability and metal oxide particles (0.01-10 μm) that provide dispersion stability. This segmentation allows each component to specialize in its strength, with titanium dioxide focusing on optical performance and metal oxide particles focusing on dispersion stability, resolving the contradiction between concealability and dispersion stability.
Solution Approach 2:
The patent creates a composite pigment system where titanium dioxide particles and metal oxide particles work synergistically. The metal oxide particles with smaller diameters fill the spaces between larger titanium dioxide particles and interact with the dispersant, creating a stable dispersion structure that maintains the concealability benefits of titanium dioxide while adding dispersion stability.
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 ink composition achieves excellent dispersion stability and jettability, enabling the recording of images with improved concealability and visibility on various base materials.
Implementation Method 1
An ink composition contains titanium dioxide particles, metal oxide particles, a dispersant, and water... the dispersibility of the titanium dioxide particles is not necessarily sufficient
Implementation Method 2
the ink composition contains a dispersant... improves the dispersibility and stability of the titanium dioxide particles
Data Source
AI summary
An ink composition is an ink composition including titanium dioxide particles, metal oxide particles, a dispersant, and water, in which an average particle diameter of the titanium dioxide particles is 100 nm or greater, an average particle diameter of the metal oxide particles is smaller than the average particle diameter of the titanium dioxide particles, and the metal oxide particles are oxide particles of at least one metal selected from the group consisting of zirconium, aluminum, silicon, zinc, and iron.