Ester-Based Plasticizer Composition for PVC Thermal Stability
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Solution Overview
Problem
Existing ester-based plasticizers, such as phthalate compounds, face issues with thermal stability, migration resistance, and heating loss, while non-phthalate alternatives lack sufficient physical properties and compatibility with polyvinyl chloride resins.
Innovation Solution
An ester-based plasticizer composition is formulated with specific weight ratios and molecular structures, satisfying Relations 1 and 2, enhancing thermal stability, migration resistance, and compatibility, and including a polyvinyl chloride resin composition with additives for improved mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ester-based plasticizers (phthalate compounds) are used, then compatibility with polyvinyl chloride resin is improved, but thermal stability and migration resistance deteriorate
Solution Approach 1:
The patent uses a composite plasticizer system combining multiple ester-based compounds (cyclohexane diester, adipate, sebacate, and polymer-type ester) in specific weight ratios. This composite approach leverages the complementary properties of each component: cyclohexane diester provides base compatibility, while the other esters contribute to thermal stability and migration resistance, achieving overall improvement in both compatibility and thermal stability that single compounds cannot provide.
Solution Approach 2:
The patent optimizes the weight ratios of different ester-based compounds as key parameters. Specifically, it controls cyclohexane diester at 10-80 wt%, adipate at 10-60 wt%, sebacate at 10-60 wt%, and polymer-type ester at 1-30 wt%. By adjusting these compositional parameters within specific ranges, the patent achieves the optimal balance between compatibility and thermal stability, demonstrating parameter optimization to resolve the contradiction.
2Object-affected harmful factors
If non-phthalate ester-based plasticizers are used, then environmental hormone problems are reduced, but physical properties and thermal stability deteriorate
Solution Approach 1:
The patent replaces single non-phthalate plasticizer compounds with a composite system of multiple ester-based compounds. This composite approach restores the physical properties and thermal stability that were lost when transitioning from phthalate to non-phthalate plasticizers, while maintaining the environmental benefits. The synergistic effect of the composite components achieves performance comparable to or exceeding conventional phthalate plasticizers.
Solution Approach 2:
The patent optimizes the compositional parameters of the non-phthalate ester-based plasticizer system by controlling the weight ratios of cyclohexane diester, adipate, sebacate, and polymer-type ester within specific ranges. This parameter optimization ensures that the non-phthalate plasticizer composition achieves sufficient physical properties, tensile strength, and thermal stability, making it a viable replacement for phthalate-based alternatives.
3Device complexity
If single ester-based plasticizer compounds are used, then simplicity of composition is maintained, but thermal stability and migration resistance are insufficient
Solution Approach 1:
The patent transitions from single compound plasticizers to a multi-component ester-based plasticizer composition. This composite structure, while more complex than single compounds, provides superior thermal stability and migration resistance through the synergistic effects of the different ester components, each contributing specific properties that complement the others.
Solution Approach 2:
The patent manages compositional complexity by establishing specific weight ratio parameters for each component: cyclohexane diester (10-80 wt%), adipate (10-60 wt%), sebacate (10-60 wt%), and polymer-type ester (1-30 wt%). These defined parameter ranges provide a systematic framework that balances composition complexity with performance requirements, making the multi-component system manageable and reproducible.
4Ease of operation
If plasticizer content is increased to improve flexibility, then processability is enhanced, but heating loss and volatility increase
Solution Approach 1:
The patent optimizes the plasticizer composition parameters (weight ratios of different esters) to achieve high processability with reduced heating loss. The specific composition parameters control the volatility and thermal stability characteristics, allowing the plasticizer to maintain flexibility and processability while minimizing substance loss during heating and processing operations.
Solution Approach 2:
The composite ester-based plasticizer composition reduces heating loss and volatility compared to single compound plasticizers. The combination of different ester components creates a more thermally stable system that maintains flexibility and processability while reducing the overall volatility and substance loss during high-temperature processing.
Data Source
AI summary
The present invention relates to an ester-based plasticizer composition and use thereof. Since the synergistic effect is provided to the improvement of thermal stability such as migration resistance and loss-on-heating to contribute to the improvement of the physical properties of a molded product, and compatibility with polyvinyl chloride resin and processability are excellent, the present invention can provide molded products with excellent mechanical properties as well as thermal stability.