Bio-based Toner Composition with Polymer Shell for Offset Control
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Solution Overview
Problem
Current toner compositions, particularly those used in xerographic systems, often rely on fossil fuel-based materials like bisphenol A, which pose environmental and health risks, and there is a need for biodegradable, economically viable alternatives with improved properties such as low melting points, high yields, and reduced hot and cold offset issues.
Innovation Solution
A toner composition featuring a core of bio-based amorphous polyester resin and a phenol-free crystalline polyester resin, encased in a polymer shell, specifically using poly(bis-rosin-neopentylene-terephthalate) and poly(bis-rosin-neopentylene-succinate) with a styrene acrylate shell, which are prepared through specific reaction schemes and processes to achieve enhanced biodegradability and performance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fossil fuel-based materials like bisphenol A are used in toner compositions, then manufacturing cost and availability are improved, but environmental impact and health risks worsen
Solution Approach 1:
The patent substitutes the chemical composition parameters of the resin core by using bio-based materials (rosin, vegetable oils) instead of fossil fuel-based materials (bisphenol A). This changes the molecular structure and sourcing parameters while maintaining the functional properties needed for toner performance, thereby reducing environmental impact without sacrificing manufacturability
Solution Approach 2:
The patent creates a composite material system combining bio-based amorphous polyester resin with crystalline polyester resin and colorant. This composite approach allows the use of environmentally friendly bio-based materials while maintaining the functional performance required for toner operation, effectively replacing harmful fossil fuel-based components
2Object-affected harmful factors
If bio-based polymers are used to replace fossil fuel-based materials, then environmental biodegradability is improved, but manufacturing cost and complete biodegradability worsen
Solution Approach 1:
The patent applies local quality by using bio-based materials specifically in the resin core portion of the toner composition while maintaining compatibility with other toner components. This targeted application ensures environmental benefits where most needed (in the polymer matrix) without requiring complete biodegradability of all toner components, thus balancing environmental improvement with manufacturing feasibility
Solution Approach 2:
The patent employs bio-based polymers that are designed to be biodegradable under specific conditions, accepting that complete biodegradation may not occur in all environments. This approach prioritizes environmental friendliness over complete biodegradability, using economically viable bio-based materials that provide sufficient environmental benefit without requiring total decomposition
3Object-affected harmful factors
If toner compositions are formulated with improved biodegradability, then environmental impact is reduced, but melting point control and offset issues worsen
Solution Approach 1:
The patent formulates a composite resin system combining bio-based amorphous polyester with crystalline polyester resin. This composite structure allows the bio-based component to provide environmental benefits while the crystalline component contributes to thermal stability and controlled melting behavior, thereby maintaining reliable offset performance despite using biodegradable materials
Solution Approach 2:
The patent assigns different functional qualities to different components of the toner composition: the bio-based amorphous polyester resin core provides environmental biodegradability, while the crystalline polyester resin phase provides thermal control and melting point stability. This functional differentiation allows simultaneous achievement of environmental improvement and reliable melting point 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 solution provides toners with improved biodegradability, reduced environmental impact, low melting points, high yields, consistent particle sizes, and minimized hot and cold offset, while maintaining excellent gloss and cohesion properties, thus addressing the environmental and health concerns associated with traditional toners.
Implementation Method 1
Biodegradable (bio) polymers have been referred to as a group of materials that respond to the action of enzymes, and that chemically degrade by their interaction with living organisms
Implementation Method 2
a core of a bio-based amorphous resin, colorant, and a crystalline polyester resin
Implementation Method 3
a polymer shell thereover the core
Data Source
AI summary
Disclosed are toner compositions that contain a core of at least one bio-based amorphous polyester resin, at least one of a crystalline polyester resin, an optional colorant, and an optional wax, and where the core is coated with a polymeric shell.