IPBC Biocidal Composition for Wet-State Bacterial Control
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Solution Overview
Problem
Existing coatings require multiple biocidal ingredients to protect against microbial attack in both wet and dry film states, and there is a need for biocidal compositions that are free of isothiazolinones, pyrithiones, and formaldehydes due to regulatory pressures.
Innovation Solution
A biocidal composition comprising iodopropynyl butylcarbamate (IPBC) enhanced with zinc oxide and 1,2-hexanediol, which synergistically provides broad-spectrum protection against bacteria and fungi in both wet and dry film states without additional biocides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple biocidal ingredients are used to protect against microbial attack in both wet and dry film states, then protection efficacy is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines IPBC (a fungicide) with zinc oxide and 1,2-hexanediol to create a single biocidal composition that provides both wet-state bacterial control and dry-film fungal protection, merging the functions of multiple separate biocidal products into one formulation
Solution Approach 2:
The biocidal composition achieves multi-functionality by protecting coatings in both wet and dry film states against different types of microorganisms (bacteria in wet state, fungi in dry film), allowing a single product to replace multiple specialized biocides
2Reliability
If multiple biocidal ingredients are used to achieve adequate protection, then protection efficacy is improved, but manufacturing and operational simplicity deteriorates
Solution Approach 1:
The patent merges the formulation process by combining IPBC, zinc oxide, and 1,2-hexanediol into a single biocidal composition that can be added to coatings in one step, eliminating the need for separate formulation and application of multiple biocidal products
3Reliability
If conventional biocidal products are used for wet-state and dry-film protection, then protection coverage is improved, but regulatory compliance worsens due to sensitizing and CMR preservatives
Solution Approach 1:
The patent changes the chemical composition parameters by selecting IPBC, zinc oxide, and 1,2-hexanediol as biocidal agents that provide effective protection without containing sensitizing or CMR preservatives, thereby improving regulatory compliance while maintaining protection coverage
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 composition offers reduced costs, simplified operations, and favorable regulatory compliance by providing single-product protection against microbial growth in coatings, while avoiding isothiazolinones and formaldehydes.
Implementation Method 1
zinc oxide enhances the bactericidal activity of IPBC in aqueous compositions, and the combination of IPBC and zinc oxide acts synergistically
Implementation Method 2
1,2-hexanediol is unexpectedly and exceptionally effective at controlling wet state bacterial growth, repurposing the fungicide IPBC to kill bacteria in the wet state
Data Source
AI summary
A biocidal composition, comprising an antibacterially effective combination of IPBC, zinc oxide, and bacterial membrane disrupting substances, and a working composition comprising water, one or more organic compounds, and a biocidal composition comprising IPBC, zinc oxide, and a bacterial membrane disrupting substance, effective for wet-state and dry-film preservation of the working composition. Also, a method of enhancing antibacterial activity of IPBC in a wet-state working composition comprising water and one or more organic compounds, comprising treating the working composition with IPBC in the presence of zinc oxide and bacterial membrane disrupting substances, and a method of treating an aqueous working formulation containing one or more organic compounds, to prevent, inhibit, or reduce wet-state bacterial contamination of the formulation, comprising treating the working formulation with a biocidal composition comprising an antibacterially effective combination of IPBC, zinc oxide, and a bacterial membrane disrupting substance.