Multi-unit Hindered Phenol Antioxidant for Low Migration
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Solution Overview
Problem
Traditional hindered phenolic antioxidants migrate easily from polymer materials, leading to reduced performance and environmental/ecological harm, and simply increasing molecular weight does not necessarily achieve both anti-migration and antioxidant properties.
Innovation Solution
A low-migration hindered phenol antioxidant compound with an optimized ratio of hindered phenol units to molecular weight, greater than 1, is developed using a specific chemical structure and synthesis method, such as esterification or transesterification reactions, to enhance retention within the polymer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hindered phenolic antioxidants are used, then antioxidant capacity is provided, but migration from polymer occurs leading to performance loss and environmental harm
Solution Approach 1:
The patent changes the molecular weight parameter and structural parameters of hindered phenolic antioxidants by creating multi-unit compounds (2-unit, 3-unit, 4-unit structures). This parameter change increases molecular weight while maintaining antioxidant functionality, thereby reducing migration from the polymer matrix while preserving antioxidant capacity.
Solution Approach 2:
The patent merges multiple hindered phenolic units into single multi-unit antioxidant molecules. By combining 2, 3, or 4 hindered phenolic units into one molecule, the patent creates compounds that provide enhanced antioxidant capacity while the increased molecular weight and complex structure reduce migration from the polymer.
2Loss of substance
If molecular weight of hindered phenol antioxidants is increased, then migration resistance is improved, but antioxidant properties may be compromised
Solution Approach 1:
The patent optimizes the molecular weight parameter by creating multi-unit structures with specific configurations. Rather than simply increasing molecular weight, the patent designs 2-unit, 3-unit, and 4-unit hindered phenolic compounds where the molecular weight increase is balanced with structural organization, maintaining antioxidant properties while achieving migration resistance.
Solution Approach 2:
The patent segments the antioxidant function into multiple independent hindered phenolic units within a single molecule. Each unit contributes to the overall antioxidant capacity, and the segmented structure with specific linkages maintains the necessary properties for antioxidant activity while the overall molecular weight provides migration resistance.
Data Source
AI summary
Disclosed are a low-migration hindered phenol antioxidant compound, a preparation method and a composition. During production, processing or use, polymers experience degradation due to factors such as light, oxygen and heat. The oxidation resistance thereof is often increased by adding one or more common antioxidants, thereby inhibiting and delaying the rate if oxidative degradation thereof. The structures of traditional hindered phenolic antioxidant compounds migrate in polymers. The hindered phenolic antioxidant compound of the present invention has more hindered phenol units, and can achieve the objectives of low extraction and low migration.