Polyester Toner Resin with Titanium Catalyst for Low TVOC
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Solution Overview
Problem
Current polyester resins for toners face challenges in reducing Total Volatile Organic Compounds (TVOC) while maintaining high productivity, and they often have issues with non-offset properties, image stability, and durability due to poor compatibility with wax components.
Innovation Solution
A polyester resin for toners is developed using ethylene glycol, a hydrocarbon group with 12 carbon atoms or more, and titanium-based catalysts, which reduces TVOC to 380 ppm or less, enhances wax compatibility, and improves fixing performance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a large quantity of bisphenol A derivatives is used in polyester resin, then TVOC is reduced, but environmental safety is compromised and productivity is lowered due to poor reactivity
Solution Approach 1:
The patent changes the chemical composition parameters by limiting bisphenol A derivative content to 5 mass% or less while introducing specific functional groups (carboxyl, hydroxyl, glycidyl, isocyanate, or ester groups) at the molecular ends to maintain reactivity and productivity while reducing TVOC
Solution Approach 2:
The patent creates a composite polyester resin system combining limited bisphenol A derivatives with specific end-functional groups and other monomers (polyhydric alcohols, polybasic acids) to achieve both low TVOC and high productivity through synergistic effects
2Object-generated harmful factors
If polyester resin is used for toner, then TVOC is reduced compared to other binders, but non-offset property is poor due to poor peelability at fixing
Solution Approach 1:
The patent modifies the resin composition by incorporating specific functional groups (carboxyl, hydroxyl, glycidyl, isocyanate, ester) that enhance intermolecular forces and peelability during fixing, thereby improving non-offset property while maintaining low TVOC characteristics
Solution Approach 2:
The patent creates a composite resin system combining polyester base resin with specific functional end groups and compatible wax components to achieve both low TVOC and improved non-offset performance through enhanced intermolecular interactions
3Reliability
If wax is blended in toner to impart peelability, then fixing performance is improved, but dispersion state becomes uneven due to poor compatibility with polyester resin
Solution Approach 1:
The patent changes the resin composition by introducing specific functional groups (carboxyl, hydroxyl, glycidyl, isocyanate, ester) that enhance polarity and compatibility with wax components, enabling uniform dispersion while maintaining fixing performance
Solution Approach 2:
The patent creates a composite system where polyester resin with specific end-functional groups forms compatible interactions with wax components, achieving uniform dispersion state and stable fixing performance through enhanced intermolecular forces
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 achieves significantly reduced TVOC levels, high productivity, and improved fixing performance, non-offset properties, and image stability, while ensuring environmental safety and effective wax dispersibility.
Implementation Method 1
a polyester resin for toner which is a polycondensate of a polyhydric alcohol and a polybasic acid
Implementation Method 2
a polyester resin for toner which is a polycondensate of a polyhydric alcohol and a polybasic acid, and has a glass transition temperature of 40°C to 85°C
Data Source
AI summary
There are provided a polyester resin for toner which has a sufficiently low TVOC, can be produced with high productivity, and can produce toner having excellent durability; and toner containing the polyester resin for toner. The polyester resin for toner has a TVOC of 380 ppm or less and includes a component derived from ethylene glycol, a hydrocarbon group having 12 carbon atoms or more, and a titanium element.