Plasticizer Composition for PVC Processability and Mechanical Strength
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Solution Overview
Problem
Current plasticizers, such as di(2-ethylhexyl)terephthalate (DEHTP), face challenges with inferior plasticization efficiency, migration, and mechanical properties, necessitating the development of a more effective and environmentally friendly alternative for use in vinylchloride-based resin compositions.
Innovation Solution
A plasticizer composition combining terephthalate-based, dibenzoate-based, and citrate-based materials, with specific weight ratios and formulations, to enhance absorption rate, processability, and mechanical properties, including improved tensile strength and elongation rate, while reducing volatile loss and migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional plasticizers like DEHTP are used, then environmental friendliness is improved, but plasticization efficiency and mechanical properties deteriorate
Solution Approach 1:
The patent applies composite materials by combining three different plasticizer types (terephthalate-based, dibenzoate-based, and citrate-based) into a single composition. This composite approach allows the mixture to exhibit superior mechanical properties and plasticization efficiency compared to individual conventional plasticizers, while maintaining environmental friendliness through the selection of non-phthalate components.
Solution Approach 2:
The patent utilizes parameter changes by carefully controlling the weight ratios of the three plasticizer components within specific ranges (terephthalate: 60-90 parts, dibenzoate: 5-30 parts, citrate: 5-20 parts). By optimizing these compositional parameters, the invention achieves both improved mechanical properties and maintained environmental safety.
2Ease of operation
If conventional plasticizers are used, then processability is maintained, but absorption rate and plasticization efficiency deteriorate
Solution Approach 1:
The patent improves absorption rate and plasticization efficiency by changing the compositional parameters of the plasticizer mixture. The specific weight ratios of terephthalate, dibenzoate, and citrate components create a synergistic effect that enhances the plasticizer's ability to be absorbed by PVC and exert plasticizing action, thereby improving productivity without compromising processability.
3Strength
If plasticizer amount is increased to improve mechanical properties, then tensile strength improves, but volatile loss and migration increase
Solution Approach 1:
The composite plasticizer composition achieves enhanced tensile strength through the synergistic interaction of three plasticizer types. The citrate-based component contributes to strength enhancement while the dibenzoate-based component reduces migration tendencies. This composite approach allows achieving desired mechanical properties with lower total plasticizer content, thereby reducing volatile loss.
Solution Approach 2:
The patent converts the potential harm of plasticizer migration and volatility into a benefit by selecting components with inherently low migration and volatility characteristics. The dibenzoate and citrate components are chosen specifically for their low migration tendencies, transforming what could be a harmful effect into a beneficial reduction in plasticizer loss.
Data Source
AI summary
The present invention relates to a plasticizer composition and a resin composition including the same. When the plasticizer composition is used as a plasticizer in the resin composition, the plasticizer composition may be environmentally friendly, may be improved in processability due to an enhanced absorption rate and enhanced plasticization efficiency, may reduce the total amount of the plasticizer to be applied due to improved physical properties such as migration and volatile loss, and may also have excellent mechanical properties due to improved tensile strength and an improved elongation rate as a plasticizer.