Epoxidized Fatty Acid Ester Plasticizer Heat Stabilization
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Solution Overview
Problem
Phthalate plasticizers in PVC products face scrutiny due to environmental and health concerns, and epoxidized vegetable oils used as substitutes tend to exude and degrade at elevated temperatures, leading to brittleness and discoloration.
Innovation Solution
A polymeric composition comprising a vinyl chloride resin, an epoxidized fatty acid ester, and a heat stabilizing composition that includes a first metal salt, a second metal salt, and a β-diketone, which reduces or eliminates spew and thermally stabilizes the composition, preventing decomposition of the fatty acid ester.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If epoxidized vegetable oil is used as a plasticizer substitute for phthalates, then environmental safety and health benefits are improved, but the material tends to exude and degrade at elevated temperatures causing brittleness and discoloration
Solution Approach 1:
The patent introduces a heat stabilizing composition as an intermediary substance that mediates between the epoxidized fatty acid ester plasticizer and the polyvinyl chloride resin. This stabilizing composition prevents direct harmful interactions and protects the plasticizer from degradation at elevated temperatures, thereby maintaining both environmental safety and thermal reliability.
Solution Approach 2:
The invention creates a composite material system consisting of polyvinyl chloride resin, epoxidized fatty acid ester plasticizer, and heat stabilizing composition working together. This composite approach combines the environmental benefits of bio-based plasticizer with the thermal stability of specialized stabilizers, resolving the contradiction between safety and reliability.
2Ease of operation
If epoxidized vegetable oil is used as a plasticizer, then softness and flexibility are improved, but spew and exudation occur at elevated temperatures
Solution Approach 1:
The heat stabilizing composition acts as an intermediary that prevents the plasticizer from migrating and exuding at elevated temperatures. It forms a protective interaction that maintains the plasticizer in place within the polymer matrix, preserving flexibility while eliminating spew.
Solution Approach 2:
The patent extracts and isolates the harmful exudation behavior from the beneficial plasticizing effect. By using a specialized heat stabilizing composition, the harmful spew is prevented while the desired flexibility from the epoxidized fatty acid ester is maintained.
3Quantity of substance
If higher proportions of epoxidized vegetable oil are used to replace phthalates, then phthalate-free formulation is achieved, but exudation increases significantly
Solution Approach 1:
The invention changes the chemical and physical parameters of the plasticizer system by introducing a heat stabilizing composition. This allows higher concentrations of epoxidized fatty acid ester to be used without the detrimental exudation effects, as the stabilizer modifies the system's thermal and compositional parameters.
Solution Approach 2:
The patent creates a three-component composite material system that enables high plasticizer loading. The combination of PVC resin, epoxidized fatty acid ester, and heat stabilizing composition works synergistically to achieve phthalate-free formulation with minimal exudation.
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 bio-based, phthalate-free plasticizer that reduces or eliminates spew, is thermally stable, and suitable for wire and cable applications, offering environmental benefits and compliance with sustainability credits.
Implementation Method 1
The heat stabilizing composition stabilizes the polymeric composition during extrusion and/or heat aging by preventing decomposition of the fatty acid ester
Data Source
AI summary
The present disclosure is directed to a polymeric composition containing a vinyl chloride resin and an epoxidized fatty acid ester. The polymeric composition also includes a heat stabilizing composition. The heat stabilizing composition includes a first metal salt, a second metal salt, and a β-diketone. The epoxidized fatty acid ester is the primary, or the sole, plasticizer in the polymeric composition. The present polymeric composition finds advantageous application as a coating for wire and cable.