Amide-Based Oxygen Scavenging Polymer Compositions
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Solution Overview
Problem
Polymers used in packaging materials are permeable to oxygen, leading to oxidative damage of contents, necessitating the development of compounds with improved oxygen scavenging capacity to extend the shelf life and preserve freshness of oxygen-sensitive products.
Innovation Solution
The development of oxygen scavenging molecules and polymer compositions that incorporate amide compounds, such as N-allylic or N-benzylic amides, which can be polymerized or used in combination with transition metals to enhance oxygen scavenging properties, are integrated into packaging materials to reduce oxygen permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polymers are used in packaging materials, then the material is permeable to oxygen, but this leads to oxidative damage of contents
Solution Approach 1:
The patent extracts the oxygen scavenging function from separate packaging components and integrates it directly into the polymer matrix by incorporating oxygen scavenger compounds (such as phenolic antioxidants, amine-based scavengers, or metal complexes) within the polymer structure. This allows the polymer itself to actively consume permeating oxygen, converting the harmful oxygen permeability into a beneficial in-situ oxygen removal mechanism that protects packaged contents without requiring additional barrier layers.
Solution Approach 2:
The patent creates composite polymer materials by combining conventional polymers with oxygen scavenger compounds and potentially transition metal catalysts. These composite materials maintain the desirable mechanical and processing properties of the base polymer while adding active oxygen scavenging capability, effectively resolving the contradiction between oxygen permeability and protective function through material composition rather than structural complexity.
2Reliability
If oxygen scavengers are added to packaging materials, then oxidative damage is reduced, but the complexity of the composition increases
Solution Approach 1:
The patent merges the oxygen scavenging function with the polymer matrix by incorporating scavenger compounds during polymer synthesis or compounding. This integration approach combines multiple functions (structural integrity, processability, and oxygen scavenging) into a single homogeneous material system, eliminating the need for separate scavenger layers or complex multi-component assemblies, thereby reducing overall system complexity while maintaining extended shelf life.
Solution Approach 2:
The patent designs polymer compositions where the base polymer serves multiple functions: providing mechanical strength, enabling processing, and hosting oxygen scavenger compounds that actively protect contents. The scavenger compounds themselves may perform multiple roles, such as both oxygen scavenging and UV stabilization, reducing the total number of additives needed and simplifying the overall composition while achieving reliable shelf life extension.
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
These compositions effectively reduce oxidative damage by scavenging oxygen, thereby extending the shelf life and maintaining the freshness of packaged goods, with oxygen transmission rates significantly lower than conventional materials.
Implementation Method 1
oxygen scavenging molecules... amide compounds, such as N-allylic or N-benzylic amides, which can be polymerized or used in combination with transition metals to enhance oxygen scavenging properties
Data Source
AI summary
The disclosure relates to oxygen scavenging molecules, compositions, methods of making the compositions, articles prepared from the compositions, and methods of making the articles. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.