Succinic Acid Ester Mixtures for PVC Softening
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Solution Overview
Problem
Current phthalate-based plasticizers for plastics face restrictions due to environmental concerns and limited sustainability, and existing succinic acid esters do not fully meet requirements for plasticizing effect and processability.
Innovation Solution
Development of mixtures of succinic acid esters based on alkyl and benzyl alcohols, specifically formulated to provide improved plasticizing properties and processability, with a focus on low dissolution temperature for efficient PVC processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phthalate-based plasticizers are used to achieve good plasticizing effect, then plasticizing properties are improved, but environmental safety and sustainability deteriorate
Solution Approach 1:
The invention changes the chemical composition parameters by replacing phthalate esters with succinic acid esters having specific molecular structures (formulas I-III with R1-R6 definitions). This substitution maintains plasticizing effectiveness while eliminating the harmful environmental properties of phthalates, achieving both reliability and environmental safety simultaneously
Solution Approach 2:
The invention uses composite plasticizer formulations containing mixtures of different succinic acid esters (dialkyl succinates, alkylbenzyl succinates, and dibenzyl succinate) to achieve optimal plasticizing performance. This composite approach combines the advantages of different ester types to match or exceed phthalate performance while maintaining environmental safety
2Object-affected harmful factors
If succinic acid esters are used as alternative plasticizers, then environmental sustainability is improved, but plasticizing effectiveness and processability deteriorate
Solution Approach 1:
The invention optimizes molecular parameters of succinic acid esters by defining specific structural formulas (I-III) with controlled alkyl and benzyl groups. This parameter optimization enhances the plasticizing effectiveness and processability of succinic acid esters to match conventional plasticizers while maintaining environmental sustainability
Solution Approach 2:
The invention creates composite plasticizer systems using mixtures of dialkyl succinates, alkylbenzyl succinates, and dibenzyl succinate. This composite formulation synergistically improves plasticizing effectiveness, processability, and compatibility with PVC, overcoming the limitations of individual succinate esters
3Object-affected harmful factors
If conventional succinic acid esters are used, then environmental friendliness is improved, but dissolution temperature and processability deteriorate
Solution Approach 1:
The invention modifies the molecular structure parameters of succinic acid esters by incorporating specific alkyl and benzyl group combinations in formulas (I-III). This structural parameter change reduces the dissolution temperature of the plasticizer-PVC system, thereby improving processability while maintaining environmental friendliness
Solution Approach 2:
The invention formulates composite plasticizer mixtures containing dialkyl succinates, alkylbenzyl succinates, and dibenzyl succinate in optimized proportions. This composite formulation lowers the overall dissolution temperature compared to conventional succinic acid esters, enabling easier processing while preserving environmental benefits
Data Source
AI summary
The present invention relates to novel succinic acid ester mixtures and to the use thereof as plasticizers for plastic materials. The claimed mixtures are characterized by having good plasticizing effects with low dissolution temperatures.