Rosin-Based Polyester Toner for Sustainable Emulsion Aggregation
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Solution Overview
Problem
Current toner compositions rely on petroleum-based sources and bisphenol-A, lacking sustainability, and face challenges in achieving high yield, small particle size, controlled morphology, and core-shell structure while maintaining good fusing and electrical performance.
Innovation Solution
Development of polyester resins derived from rosin-based diacids, diesters, or diols through polycondensation, which are used to create emulsion aggregation toners with optional crystalline or amorphous structures and colorants, allowing for bio-based, cost-effective production with improved particle size control and morphology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If petroleum-based sources and bisphenol-A are used for toner composition, then conventional toner performance is achieved, but sustainability and environmental friendliness deteriorate
Solution Approach 1:
The invention changes the chemical composition parameters by using rosin-based diacids, diesters, or diols as feedstock instead of petroleum-based sources and bisphenol-A. This substitution maintains toner performance while improving sustainability and reducing environmental harm.
Solution Approach 2:
The invention creates composite polyester resin compositions that combine rosin-based components with other compatible materials to achieve both performance reliability and environmental sustainability. The composite structure allows optimization of both functional and ecological properties.
2Productivity
If conventional emulsion aggregation methods are used, then toner production is achieved, but particle size control and morphology precision deteriorate
Solution Approach 1:
The invention optimizes emulsion aggregation process parameters including resin composition, emulsifier selection, pH control, and aggregation kinetics to achieve precise particle size control and morphology while maintaining high production efficiency.
3Reliability
If conventional resin compositions are used, then basic fusing performance is achieved, but electrical performance and controlled morphology deteriorate
Solution Approach 1:
The invention modifies resin composition parameters by incorporating rosin-based polyester with specific molecular weight, functional groups, and compositional ratios to simultaneously improve electrical performance, fusing characteristics, and morphology control.
Solution Approach 2:
The invention develops composite resin systems combining rosin-based polyester with complementary materials to achieve synergistic effects that enhance both fusing performance and electrical properties while enabling precise morphology control.
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 rosin-based toner compositions achieve high yield, small particle size, controlled morphology, and core-shell structure, offering improved fusing and electrical performance while reducing environmental impact by utilizing renewable resources and eliminating bisphenol-A.
Implementation Method 1
a polyester resin comprising the polycondensation product of: (a) at least one diacid, acid ester, or diester; and (b) at least one diol
Data Source
AI summary
Disclosed is a polyester resin comprising the polycondensation product of (a) at least one diacid, acid ester, or diester; and (b) at least one diol; wherein either (i) at least one diacid, acid ester, or diester comprises a rosin diacid, rosin acid ester, or rosin diester; or (ii) at least one diol comprises a rosin diol. Also disclosed is a toner composition comprising particles which comprise the disclosed polyester resin and an optional colorant.