Terephthalate Ester Plasticizer Composition for PVC
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Solution Overview
Problem
Current ester-based plasticizers, such as di(2-ethylhexyl) phthalate and diisodecyl phthalate, pose environmental concerns and have limitations in improving physical properties like volatility, migration resistance, and processibility in PVC resin applications, necessitating the development of environmentally friendly alternatives with enhanced performance.
Innovation Solution
A terephthalate-based ester plasticizer composition is prepared through transesterification, comprising di-(2-ethylhexyl) terephthalate, isobutyl(2-ethylhexyl)terephthalate, and diisobutyl terephthalate, which provides improved migration resistance, tensile strength, and elongation rate when used in resin compositions, along with a method for their production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional phthalate-based plasticizers (DEHP, DINP, DPHP, DIDP) are used, then processibility and absorption rates are improved, but environmental harm and endocrine disruption occur
Solution Approach 1:
The invention changes the chemical structure parameters of the plasticizer by using terephthalic acid instead of phthalic acid, and by controlling the alcohol chain length (C8-C12) and branching structure. This structural parameter change maintains the desired processibility while eliminating the harmful endocrine-disrupting properties of conventional phthalates.
Solution Approach 2:
The invention creates a composite plasticizer system by formulating mixtures of different terephthalate esters (di(C8-C12) terephthalate, di(C10-C14) terephthalate, and/or di(C12-C16) terephthalate) in specific ratios. This composite approach combines the advantages of different chain lengths to achieve both environmental friendliness and optimal processibility.
2Object-affected harmful factors
If di(2-ethylhexyl) terephthalate is used as an environmental-friendly alternative, then environmental harm is reduced, but migration resistance and stress resistance remain insufficient
Solution Approach 1:
The invention optimizes the alkyl chain parameters by using C8-C12 alcohols with specific branching structures (such as 2-ethylhexyl, isobutyl combinations). This parameter optimization enhances the molecular weight and intermolecular forces, thereby improving migration resistance while maintaining environmental friendliness.
Solution Approach 2:
The invention formulates composite plasticizer compositions containing multiple terephthalate esters with different chain lengths in specific ratios (e.g., di(C8-C12) terephthalate 30-70 wt%, di(C10-C14) terephthalate 20-50 wt%, di(C12-C16) terephthalate 10-40 wt%). This composite structure provides synergistic effects that improve migration and stress resistance compared to single-component alternatives.
3Temperature
If ester compounds with longer alkyl chains are used to improve thermal stability, then thermal stability increases, but volatility loss and migration loss may worsen
Solution Approach 1:
The invention carefully controls the alkyl chain length parameters within specific ranges (C8-C12, C10-C14, C12-C16) and optimizes the branching structure. This parameter control achieves an optimal balance where the chains are long enough to provide thermal stability but not so long that they increase volatility loss, unlike linear chains of similar molecular weight.
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 terephthalate-based ester plasticizer composition exhibits superior physical properties, including reduced volatility and migration loss, enhanced tensile strength, and improved processibility, making it suitable for various applications such as automotive interior materials, films, and toys, while minimizing environmental impact.
Implementation Method 1
conducting transesterification of an ester-based compound represented by the following Chemical Formula 3 and an alcohol represented by the following Chemical Formula 4
Data Source
AI summary
The present invention relates to an ester-based plasticizer composition, a method for preparing the same and a resin composition comprising the same. The ester-based plasticizer composition according to one embodiment of the present invention is a novel terephthalate-based ester compound for a plasticizer prepared through transesterification. When the ester-based plasticizer composition is used in a resin composition, it is capable of providing excellent resistance for stress, and excellent physical properties such as migration resistance and volatility resistance as well as tensile strength and elongation rate.