Toner Composition Dodecenylsuccinic Anhydride Blocking Temperature
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Solution Overview
Problem
Current toner compositions face challenges in achieving optimal fixing temperatures, blocking temperatures, gloss, cohesion, and particle size, with a need for economically viable solutions that reduce the use of costly monomers like dodecenylsuccinic anhydride while maintaining excellent fusing and triboelectric charging characteristics.
Innovation Solution
A toner composition comprising an amorphous polyester resin generated by catalytic polymerization of specific monomers, including terephthalic acid, fumaric acid, trimellitic acid, and dodecenylsuccinic anhydride or acid, combined with a crystalline polyester resin CPE 10:6, and a wax, optimized to reduce the amount of dodecenylsuccinic anhydride and improve properties such as blocking temperature and particle size through a core-shell structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two amorphous polyester resins are used to achieve acceptable blocking temperature and fusing characteristics, then the toner composition becomes more complex and costly, but the use of multiple resins increases manufacturing complexity and cost
Solution Approach 1:
The patent combines the functions of two separate amorphous polyester resins into a single amorphous polyester resin by incorporating dodecenylsuccinic anhydride (8-13 wt%) as a plasticizer and compatibility enhancer. This merging approach maintains the desired blocking temperature (52-60°C) and fusing characteristics while reducing formulation complexity from multiple resin components to one optimized resin system.
Solution Approach 2:
The patent changes the chemical composition parameters of the amorphous polyester resin by specifying precise amounts of dodecenylsuccinic anhydride (8-13 wt%) and particular monomer ratios (terephthalic acid, fumaric acid, trimellitic acid, bisphenol). This parameter optimization allows a single resin to achieve the performance previously requiring two resins, thereby reducing complexity while maintaining reliability.
2Ease of manufacture
If the amount of dodecenylsuccinic anhydride is reduced to lower cost, then the blocking temperature and cohesion characteristics deteriorate, but reducing this costly monomer increases economic viability
Solution Approach 1:
The patent optimizes the dodecenylsuccinic anhydride content to a specific range (8-13 wt%) where economic viability is improved through reduced monomer usage, while blocking temperature (52-60°C) and cohesion characteristics are maintained at acceptable levels. This parameter optimization balances cost reduction with performance requirements.
Solution Approach 2:
The patent creates a composite resin system combining amorphous polyester resin with controlled dodecenylsuccinic anhydride content (8-13 wt%) and crystalline polyester resin. This composite approach achieves the desired blocking temperature and cohesion while reducing reliance on expensive monomers, thereby improving economic viability without sacrificing reliability.
3Ease of manufacture
If the amount of wax component is reduced to improve economy, then the particle size consistency and gloss characteristics worsen, but reducing wax content enhances economic advantage
Solution Approach 1:
The patent reduces wax content to improve economic advantage while maintaining particle size consistency (1-15 microns) and gloss characteristics through optimized resin composition. The specific dodecenylsuccinic anhydride content (8-13 wt%) and monomer ratios compensate for reduced wax, allowing economic improvement without severe degradation of manufacturing precision.
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 toners with improved blocking temperatures, reduced wax content, and consistent small particle sizes, enhancing fusing performance and cohesion while being economically advantageous by minimizing the use of expensive monomers.
Implementation Method 1
an amorphous polyester resin, generated by the catalytic polymerization of monomers of a carboxylic acid, a dicarboxylic acid, a benzenetricarboxylic acid, at least one bisphenol, and a component selected from the group consisting of at least one of a dodecenylsuccinic anhydride and a dodecenylsuccinic acid
Data Source
AI summary
Disclosed are toner compositions that include an amorphous polyester resin, a crystalline polyester resin, a colorant and a wax, and where the amorphous polyester resin contains in excess of zero weight percent of dodecylsuccinic anhydride to less than 16 weight percent of dodecylsuccinic anhydride, or where the amorphous polyester resin contains in excess of zero weight percent of dodecylsuccinic acid to less than 16 weight percent of dodecylsuccinic acid.