Antimicrobial Polymer Composition That Avoids Acid Depolymerization
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Solution Overview
Problem
High-performance thermoplastics like acetal and TPU are susceptible to acid hydrolysis and depolymerization when using acidic additives, posing challenges for microbial control and processing issues.
Innovation Solution
A composition comprising GRAS additives such as organic acids (e.g., benzoic acid, citric acid) and 3-phenylpropanol or phenylpropanoid family members, in specific ratios, is used to provide antimicrobial properties and lower processing temperatures, forming a compounded material for thermoplastics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acidic additives are used for microbial control in high-performance thermoplastics, then antimicrobial effectiveness is improved, but polymer stability deteriorates due to acid hydrolysis and depolymerization
Solution Approach 1:
The patent uses a masterbatch as an intermediary carrier to deliver antimicrobial agents into the polymer matrix. The masterbatch acts as a buffer medium that allows controlled release of antimicrobial components without direct contact between concentrated acidic additives and the sensitive polymer, thereby reducing acid hydrolysis while maintaining microbial control effectiveness.
Solution Approach 2:
The patent changes the concentration parameters of antimicrobial agents in the masterbatch formulation. By controlling the amount of antimicrobial additive in the masterbatch (typically 1-5% by weight) and the masterbatch concentration in the final polymer (0.1-5% by weight), the system achieves effective microbial control while keeping the actual acidic additive concentration low enough to prevent polymer degradation.
2Reliability
If conventional antimicrobial additives are used, then microbial control is achieved, but processing temperature remains high causing potential polymer degradation
Solution Approach 1:
The masterbatch serves as a thermal intermediary that facilitates more efficient heat distribution during processing. The carrier materials and additives in the masterbatch create a composite structure that improves thermal conductivity and heat uniformity, allowing for reduced processing temperatures while maintaining effective antimicrobial function.
3Reliability
If high concentrations of antimicrobial additives are used to ensure effectiveness, then microbial control reliability is improved, but manufacturing complexity increases due to handling and processing difficulties
Solution Approach 1:
The patent segments the antimicrobial formulation into two separate components: the masterbatch (containing concentrated antimicrobial agents) and the polymer matrix. This segmentation allows the antimicrobial components to be pre-mixed and optimized in the masterbatch stage, then easily incorporated into the polymer at controlled concentrations, simplifying overall manufacturing while ensuring effective microbial control.
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 synergistic effect of these additives achieves effective microbial control with reduced processing temperatures, enabling the production of antimicrobial articles without depolymerization.
Implementation Method 1
a synergistic antimicrobial effect between a GRAS antimicrobial/preservative and 3-phenylpropanol
Implementation Method 2
adding 3-phenylpropanol or a member of the phenylpropanoid family into a thermoplastic polymer thereby reducing the processing temperature of the thermoplastic polymer
Data Source
AI summary
A composition having an additive or component having an antimicrobial or a preservative property, and 3-phenylpropanol or a member of the phenylpropanoid family is provided. A composition having a polymer, an organic acid, and 3-phenylpropanol or a member of the phenylpropanoid family is provided as well as a method(s) of using.