Triester Plasticizer Composition for Low Migration Resin Processing
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Solution Overview
Problem
Existing plasticizers, such as di(2-ethylhexyl) terephthalate (DEHTP) and tri(2-ethylhexyl) trimellitate, face issues with high volatility, thermal instability, mechanical property degradation, and compatibility with resins, leading to unpredictable physical property changes and increased production costs, while eco-friendly alternatives like triisononyl trimellitate require excessive amounts for effective plasticization.
Innovation Solution
A triester-based plasticizer composition derived from the esterification of a hexanoic acid isomer mixture and benzoic acid, with specific weight ratios and branching, improves mechanical properties, absorption rate, stress migration, and plasticization efficiency while maintaining migration resistance and volatile loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If DEHTP plasticizer is used, then cost is reduced and hardness is improved, but absorption rate is slow and migration resistance is poor
Solution Approach 1:
The patent changes the chemical structure parameters of the plasticizer by using transesterification with butanol to modify DEHTP, creating a new plasticizer composition that improves absorption rate while maintaining cost-effectiveness
Solution Approach 2:
The patent creates a composite plasticizer system by combining DEHTP with its transesterification product, achieving synergistic effects that improve both absorption rate and migration resistance while maintaining commercial viability
2Reliability
If trimellitate-based plasticizer is used, then migration resistance is improved, but plasticization efficiency is degraded and unit price increases
Solution Approach 1:
The patent modifies the chemical structure by controlling the transesterification degree and molecular weight of the DEHTP derivative, achieving optimal balance between migration resistance and plasticization efficiency without requiring high amounts of expensive materials
3Productivity
If transesterification product with butanol is used, then plasticization efficiency is improved, but volatile loss increases and thermal stability decreases
Solution Approach 1:
The patent applies partial transesterification rather than complete conversion, controlling the degree of reaction to achieve sufficient plasticization efficiency improvement while limiting volatile loss and thermal stability degradation
Solution Approach 2:
The patent optimizes the transesterification reaction parameters including catalyst type, temperature, and time to achieve the desired balance between plasticization efficiency and thermal stability
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 triester-based plasticizer composition achieves balanced physical properties, including improved tensile strength, elongation rate, and reduced volatile loss, making it suitable for mass production and environmentally friendly applications.
Implementation Method 1
one or more triesters which are products derived from the esterification of a carboxylic acid composition comprising a hexanoic acid isomer mixture, benzoic acid, and a trihydric alcohol
Data Source
AI summary
The present invention relates to a triester-based plasticizer composition including a product derived from the esterification of a carboxylic acid composition having a hexanoic acid isomer mixture and benzoic acid, and a trihydric alcohol. If the plasticizer composition is applied to a resin, migration resistance and volatile loss may be maintained at equal levels, and mechanical properties, absorption rate, stress migration and plasticization efficiency may be markedly improved in contrast to a conventional plasticizer.