Biorenewable Thermoplastic Elastomer Hardness and Bleeding Control
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Solution Overview
Problem
Developing thermoplastic elastomers (TPEs) from biorenewable materials that match the physical performance of fossil-fuel derived TPEs is challenging, as existing biorenewable materials fail to combine effectively to achieve commercially acceptable properties such as Shore A hardness and stability.
Innovation Solution
A unique combination of polyether/polyamide copolymer, epoxidized soybean oil, and vulcanized vegetable oil, where the vulcanized vegetable oil stabilizes the epoxidized soybean oil, preventing bleeding and adjusting the hardness to a commercially acceptable range, while maintaining biorenewable content above 70%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If epoxidized soybean oil is combined with COPA to reduce hardness, then Shore A hardness decreases to acceptable range, but oil bleeding occurs making the TPE unacceptable
Solution Approach 1:
Vulcanized vegetable oil acts as an intermediary substance between epoxidized soybean oil and COPA. It stabilizes the epoxidized soybean oil to prevent bleeding while maintaining the hardness reduction effect, effectively mediating between the conflicting requirements of hardness adjustment and bleeding prevention
2Object-generated harmful factors
If vulcanized vegetable oil is combined with COPA to stabilize the TPE, then oil bleeding is prevented, but the TPE becomes too hard for commercially acceptable uses
Solution Approach 1:
The invention merges vulcanized vegetable oil and epoxidized soybean oil in specific proportions (20-60% VVO and 10-40% ESO) to combine their complementary effects: VVO provides stability and bleeding prevention, while ESO provides hardness reduction, achieving both goals simultaneously
3Reliability
If biorenewable materials are used to create sustainable TPE, then environmental sustainability is improved, but physical performance properties become unacceptable compared to fossil-fuel derived TPEs
Solution Approach 1:
The invention creates a composite material system using biorenewable copolyamide, epoxidized soybean oil, and vulcanized vegetable oil. This composite approach allows each component to contribute specific properties, achieving a balance between sustainability and physical performance that matches conventional fossil-fuel derived TPEs
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 biorenewable TPE achieves commercially acceptable Shore A hardness ranging from 22 to 72, with minimal oil bleeding and retention of physical properties, enabling sustainable alternatives to conventional TPEs with high biorenewable content.
Implementation Method 1
the vulcanized vegetable oil, though a solid powder, contributes to the stability of the biorenewable TPE, minimizing bleeding of epoxidized soybean oil from the TPE
Implementation Method 2
A combination of only epoxidized soybean oil with COPA yields a totally unacceptable oil-bleeding TPE... the ESO bleeding from the COPA without blocking the performance of the ESO to reduce the hardness of the COPA
Data Source
AI summary
A thermoplastic elastomer compound is disclosed having polyether-polyamide copolymer, epoxidized soybean oil, and vulcanized vegetable oil. The compound has a biorenewable content of the compound of at least about 70 weight percent. The compound can be used to make a plastic article needing a Shore A hardness of from about 22 to about 72. The compound is a sustainable solution for extruded or molded articles.