DPHP Citrate Plasticizer Composition for PVC
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Solution Overview
Problem
There is a need for a plasticizer that can improve physical properties such as plasticizing efficiency, migration, and gelling properties in PVC resin compositions, particularly to replace diisononyl phthalate (DINP) due to environmental regulations, while maintaining or exceeding its performance in applications requiring heat and cold resistance.
Innovation Solution
A plasticizer composition comprising di(2-propylheptyl) phthalate and a citrate-based material at specific weight ratios, along with optional additives like epoxidized esters, to enhance the physical properties of PVC resin compositions, including improved tensile strength, elongation rate, and resistance to volatility and temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diisononyl phthalate (DINP) is used as a plasticizer, then plasticizing efficiency and processing performance are improved, but environmental harm increases due to regulatory restrictions
Solution Approach 1:
The patent replaces regulated phthalate plasticizers (DINP) with a combination of DPHP and citrate-based materials. DPHP is not subject to environmental regulations and provides similar plasticizing efficiency, while the citrate-based material enhances environmental compatibility. This substitution maintains processing performance without the environmental harm associated with DINP.
2Ease of operation
If conventional plasticizers are used to achieve desired physical properties, then processing performance is improved, but migration and volatility increase
Solution Approach 1:
The patent employs a composite plasticizer system combining DPHP and citrate-based materials in specific ratios (3:7 to 7:3). This composite approach leverages the complementary properties of both components: DPHP provides thermal stability and low volatility, while citrate-based materials contribute to plasticizing efficiency and reduced migration. The synergistic effect achieves superior processing performance with minimized substance loss.
3Device complexity
If single-component plasticizers are used, then formulation simplicity is maintained, but physical properties such as tensile strength and elongation rate are insufficient
Solution Approach 1:
The patent merges DPHP and citrate-based materials into a unified plasticizer composition with optimized weight ratios (3:7 to 7:3). This combination integrates the thermal stability and low migration characteristics of DPHP with the high plasticizing efficiency of citrate-based materials, achieving enhanced tensile strength and elongation rate while maintaining formulation practicality through a defined compositional range.
4Object-affected harmful factors
If DPHP is used alone to replace DINP, then environmental compliance is improved, but plasticizing efficiency and gelling properties are insufficient
Solution Approach 1:
The citrate-based material acts as an intermediary enhancer that amplifies the plasticizing efficiency of DPHP. While DPHP provides environmental compliance and thermal stability, the citrate-based material contributes hydroxyl groups that form hydrogen bonds with PVC, improving plasticizing efficiency and gelling properties. The synergistic interaction between the two components achieves DINP-equivalent performance with superior environmental compliance.
Data Source
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AI summary
The present invention relates to a plasticizer composition, a resin composition, and preparation methods therefor, and can provide: a plasticizer capable of improving physical properties such as plasticizing efficiency, migration, tensile strength, elongation, stress migration and light resistance, which are required in sheet formulation, when used as a plasticizer of a resin composition by improving inferior physical properties generated because of structural limitations; and a resin composition containing the same.