Electrophotographic Toner Copper Complex Dye Stability
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Solution Overview
Problem
Current electrophotographic toners face challenges in achieving high transparency, light fastness, and thermal resistivity, with organic dyes being prone to sublimation and contamination, and organic pigments having poor dispersibility and transparency issues, which affect color reproduction and image quality.
Innovation Solution
An electrophotographic toner containing a specific copper complex compound and a dye with a particular structure dispersed in a thermoplastic resin, enhancing stability and image quality by improving light fastness and thermal resistivity without relying on liquid properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If organic dyes are used in electrophotographic toner, then transparency and chromaticness are improved, but light fastness and thermal resistivity deteriorate due to sublimation and contamination
Solution Approach 1:
The invention uses a composite colorant system combining organic dye and metal complex compound in specific proportions (0.1-10 wt% metal complex to 99.9-90 wt% organic dye). This composite approach allows the dye to provide transparency and chromaticness while the metal complex compound suppresses sublimation and improves light fastness, resolving the contradiction between transparency and reliability.
2Reliability
If organic pigments are used in electrophotographic toner, then light fastness and thermal resistivity are improved, but transparency and chromaticness deteriorate due to poor dispersibility and high covering power
Solution Approach 1:
The invention applies local quality by using ultrafine metal complex compound particles (0.1-10 μm) that can be uniformly dispersed throughout the toner matrix. This ultrafine dispersion allows the metal complex to provide reliability benefits locally without creating the aggregation and covering power problems that plague conventional pigment systems, thus maintaining transparency.
Solution Approach 2:
The invention changes the particle size parameter of the metal complex compound to the ultrafine range (0.1-10 μm), which fundamentally alters its behavior. At this scale, the metal complex compounds disperse uniformly rather than aggregating, providing reliability without the transparency-predicting covering power issues of conventional pigments.
3Stability of the object's composition
If pigment particles are dispersed in toner, then colorant stability is improved, but transparency is lowered due to particle aggregation and insufficient dispersibility
Solution Approach 1:
The invention changes the particle size parameter to ultrafine dimensions (0.1-10 μm) and controls the dispersion state to prevent aggregation. This parameter optimization allows the colorant to maintain stability while achieving uniform dispersion that preserves transparency, avoiding the aggregation problem that plagues conventional pigment systems.
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 toner achieves excellent chromaticness, light fastness, and thermal resistivity, ensuring high transparency and color reproducibility, reducing the risk of dye sublimation and contamination, and maintaining stability across various environmental conditions.
Implementation Method 1
a means by using a specific anthraquinone dye or a chelate dye is proposed
Implementation Method 2
an electrophotographic toner which contains a compound represented by the following Formula X-1 and a copper complex compound represented by the following Formula (1)
Data Source
AI summary
An electrophotographic toner is disclosed. The toner contains a compound of Formula X-1 and a copper complex compound represented by the following Formula (1), which are defined detain in the specification.