Oxygen-Absorbing Resin Composition with Trigger Catalyst
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Solution Overview
Problem
Current oxygen-absorbing resin compositions for packaging, such as those using iron powder or ethylenically unsaturated hydrocarbons, face issues like coloration, bad smell, and reduced moldability, limiting their application in transparent packaging and long-term storage due to insufficient oxygen absorption and stability.
Innovation Solution
A resin composition comprising a thermoplastic resin, a trigger resin for oxidation, and a transition metal catalyst, where the catalyst is incorporated into a masterbatch and then mixed with additional thermoplastic and trigger resins to prevent burning and enhance oxygen absorption without compromising transparency or moldability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If iron powder is incorporated into resin to absorb oxygen, then oxygen absorption ability is improved, but coloration occurs and transparency is lost
Solution Approach 1:
The patent extracts the harmful coloration effect from the oxygen absorption function by replacing iron powder with organic peroxide initiators and transition metal catalysts. This substitution removes the coloration problem while preserving the oxygen absorption capability through a different chemical mechanism (oxidation of organic compounds rather than iron oxidation).
Solution Approach 2:
The patent changes the chemical parameters of the oxygen absorption system by using organic peroxides and transition metal catalysts instead of iron powder. This parameter change allows the system to absorb oxygen without the characteristic coloration of iron oxide, maintaining resin transparency while achieving reliable oxygen absorption.
2Reliability
If ethylenically unsaturated hydrocarbon is increased to improve oxygen absorption, then oxygen barrier property is improved, but moldability and transparency deteriorate
Solution Approach 1:
The patent introduces transition metal catalysts as intermediaries that enable oxygen absorption through a controlled oxidation mechanism. This intermediary system allows the resin to absorb oxygen without requiring large amounts of ethylenically unsaturated hydrocarbon, thereby preserving both moldability and transparency while achieving adequate oxygen barrier properties.
Solution Approach 2:
The patent changes the mechanism of oxygen absorption from direct hydrocarbon oxidation to catalyst-mediated oxidation. This parameter change in the chemical reaction pathway allows for controlled oxygen absorption at lower concentrations of unsaturated hydrocarbons, maintaining the resin's moldability and transparency while improving oxygen barrier properties.
3Duration of action of stationary object
If resin composition is used for long-term storage, then storage duration is improved, but burning occurs during processing
Solution Approach 1:
The patent applies preliminary protective action by incorporating antioxidants and stabilizers into the resin composition before processing. These additives prevent burning during high-temperature processing while allowing the oxygen absorption system to function effectively during long-term storage. The protective agents are consumed during processing, preserving the oxygen absorption capability for later use.
Solution Approach 2:
The patent converts the potential harmful effect of oxidation (which could cause burning) into a beneficial controlled oxidation process for oxygen absorption. By using transition metal catalysts and antioxidants, the system channels oxidation reactions into controlled oxygen absorption rather than uncontrolled combustion, enabling both long-term storage stability and safe processing.
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 a high-quality oxygen-absorbing resin composition that effectively absorbs oxygen without burning, maintaining transparency and moldability, thus addressing the limitations of existing technologies in packaging applications.
Implementation Method 1
a transition metal catalyst in specific amounts can absorb oxygen gas because said trigger resin acts on the thermoplastic resin for the initiation of the oxidation thereof
Implementation Method 2
said trigger resin acts on the thermoplastic resin for the initiation of the oxidation thereof
Data Source
AI summary
A high-quality oxygen-absorbing resin composition which is obtained without suffering resin scorching. Also provided are pellets for the oxygen-absorbing resin composition which comprise a thermoplastic resin (A) and an oxidation catalyst. After the pellets are mixed with a trigger resin and a thermoplastic resin (C), the trigger resin functions as a trigger to cause the oxidation of the thermoplastic resins (A) and (C) to proceed. As a result, the resultant composition absorbs oxygen.