Terephthalate Plasticizer Composition for Low Migration Resins
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Solution Overview
Problem
Existing plasticizers, such as di(2-ethylhexyl) terephthalate, face issues with high hardness, slow absorption rate, migration, stress degradation, and environmental toxicity, necessitating the development of eco-friendly alternatives with improved mechanical properties and cost-effectiveness.
Innovation Solution
A plasticizer composition comprising 2-ethylhexyl(2-hydroxyethyl) terephthalate and di(2-ethylhexyl) terephthalate, derived from recycled polyethylene terephthalate, with controlled ratios and inclusion of dimer compounds, prepared through a trans-esterification reaction, to enhance migration resistance and absorption rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If di(2-ethylhexyl) terephthalate (DEHTP) is applied as a plasticizer, then cost-effectiveness is improved, but mechanical properties, absorption rate, and migration resistance deteriorate
Solution Approach 1:
The patent uses a composite plasticizer system combining DEHTP with dioctyl adipate (DOA) and/or dibutyl adipate (DBA). This composite approach allows the mixture to achieve better mechanical properties, absorption rate, and migration resistance compared to pure DEHTP, while maintaining cost-effectiveness through the use of relatively inexpensive components.
2Ease of manufacture
If phthalate-based plasticizers are used, then cost-competitiveness is improved, but environmental safety and health effects deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by replacing phthalate-based plasticizers with terephthalate-based (DEHTP) and adipate-based (DOA, DBA) plasticizers. This substitution maintains cost-competitiveness while improving environmental safety and health effects, as the alternative plasticizers have better eco-friendly profiles without sacrificing performance.
3Speed
If trans-esterification reaction with butanol is applied to improve plasticization efficiency, then absorption rate is improved, but mechanical properties and stress resistance deteriorate
Solution Approach 1:
The patent employs a composite plasticizer system where DEHTP is combined with DOA and/or DBA in specific ratios. This composite formulation achieves improved absorption rate while maintaining mechanical properties and stress resistance, overcoming the limitations of using trans-esterification products alone.
4Object-affected harmful factors
If plasticizer composition is optimized for eco-friendliness, then environmental safety is improved, but cost-competitiveness may deteriorate
Solution Approach 1:
The patent optimizes the compositional parameters by selecting a specific ratio range of DEHTP to DOA and/or DBA. This parameter optimization ensures that the plasticizer mixture achieves both eco-friendliness and cost-competitiveness, as the adipate-based components provide environmental benefits while the overall formulation remains economically viable.
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 composition provides an eco-friendly plasticizer with improved mechanical properties, reduced migration and volatility, and cost-competitiveness by utilizing waste materials, while maintaining performance equal to or exceeding traditional plasticizers.
Implementation Method 1
a plasticizer composition including 2-ethylhexyl(2-hydroxyethyl) terephthalate, and di(2-ethylhexyl) terephthalate, wherein the content of the 2-ethylhexyl(2-hydroxyethyl) terephthalate is 20 wt % or less based on the total plasticizer composition
Data Source
AI summary
The present invention relates to a plasticizer composition including 2-ethylhexyl(2-hydroxyethyl) terephthalate and di(2-ethylhexyl) terephthalate, wherein the content of the 2-ethylhexyl(2-hydroxyethyl) terephthalate is 20 wt % or less based on the total plasticizer composition, and when the plasticizer composition is applied to a resin, mechanical properties, migration resistance, and loss properties may be improved.