Bio-Based Plasticizer Acyl Composition for PVC Processing
Solution Overview
Problem
Current bio-based plasticizers for polyvinylchloride lack improved properties such as plasticizing efficiency, substitution factor, and processing characteristics like hardness, flexibility at lower temperatures, and heat stability, which are crucial for polymer processing and safety, especially in applications like medical devices and food packaging.
Innovation Solution
A bio-based plasticizer comprising at least 95% by weight of a compound with specific acyl groups, providing enhanced plasticizing efficiency, reduced migration, and improved processing characteristics like tensile strength, heat stability, and flexibility, suitable for polyvinylchloride, polyvinylacetate, polyamide, and rubber polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional phthalate plasticizers are used to achieve good plasticizing efficiency and processing characteristics, then the polymer processing is improved, but health safety and environmental compatibility deteriorate due to physiological abnormalities and toxicity
Solution Approach 1:
The invention changes the chemical parameters of plasticizers by using alternative ester structures (citrate, adipate, sebacate esters of C12-C18 fatty alcohols) with specific molecular weight ranges (350-500 g/mol) and acyl group compositions (at least one C2 and one C12 acyl group). These parameter changes maintain plasticizing efficiency while eliminating the harmful phthalate structure, thus resolving the contradiction between productivity and health safety
Solution Approach 2:
The invention creates composite plasticizer formulations by mixing multiple ester components in specific ratios (e.g., citrate ester 20-40%, adipate ester 30-50%, sebacate ester 10-30%). This composite approach combines the advantages of different ester types to achieve both good plasticizing efficiency and improved health safety profile, non-toxicity, and environmental compatibility
2Object-affected harmful factors
If vegetable based plasticizers are used to replace phthalates for improved health safety, then health compatibility is improved, but plasticizing efficiency, substitution factor, and processing characteristics deteriorate
Solution Approach 1:
The invention optimizes the molecular parameters of vegetable-based plasticizers by selecting esters with specific molecular weights (350-500 g/mol) and controlled viscosity ranges (50-200 cSt at 40°C). The specific acyl group composition (C2 and C12 groups) and chain length are tuned to achieve van der Waals interactions that enhance plasticizing efficiency while maintaining the health benefits of vegetable-based origins
Solution Approach 2:
The invention introduces local structural features into the plasticizer molecules, specifically the combination of short-chain (C2) and long-chain (C12) acyl groups. This local quality differentiation creates optimal intermolecular interactions with PVC chains, improving plasticizing efficiency at specific molecular locations while maintaining the overall health compatibility of the vegetable-based structure
3Object-affected harmful factors
If existing bio based plasticizers are used to achieve environmental friendliness, then environmental compatibility is improved, but processing characteristics such as hardness, flexibility at lower temperature, and heat stability deteriorate
Solution Approach 1:
The invention adjusts key physical parameters of bio-based plasticizers including viscosity (50-200 cSt at 40°C), molecular weight (350-500 g/mol), and glass transition temperature (Tg below -50°C). These parameter optimizations ensure proper flow during processing, adequate flexibility at lower temperatures, and improved heat stability, while maintaining environmental compatibility through bio-based origins
Solution Approach 2:
The invention creates dynamic adaptability in processing characteristics by using plasticizers with Tg well below the processing temperature range. This dynamic property allows the plasticizer to remain flexible and mobile during processing, enabling ease of operation, while its bio-based structure ensures environmental compatibility. The specific acyl group composition provides optimal chain mobility across a wide temperature range
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 bio-based plasticizer offers improved plasticizing efficiency, reduced migration, increased hardness, and enhanced heat stability, making it suitable for use in food packaging, medical devices, and toys, while being non-toxic and edible, with improved mechanical properties and flexibility at lower temperatures.
Implementation Method 1
The polyvinylchloride plasticizer must act as a solvent for the crystalline part of the polyvinylchloride at flexible processing temperatures
Data Source
AI summary
A bio based plasticizer with improved properties and processing characteristics of polymer comprising at least 95% by weight compound of formula 1, [Formula should be inserted here] wherein R1 R2 and R3 represent each an acyl group or a hydrogen atom, said acyl group comprises at least one with 2 carbon atoms and one with 12 carbon atoms, the acyl group having 2 carbon atoms is present in an amount, on an average, of up to 2 mole per mole of glycerine.