Biocidal Agents Synergistic Mixture Reduces Foaming
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Solution Overview
Problem
Current biocidal agents containing 1,2-benzisothiazolin-3-one (BIT) and N-alkylguanidinium salts face issues such as foaming, high dosage requirements, and insufficient effectiveness against certain microorganisms, particularly in outdoor applications where water solubility leads to leaching, and there is a need for improved synergistic mixtures against bacteria, fungi, and algae.
Innovation Solution
Formulations combining BIT, 2-methyl-4-isothiazolin-3-one (MIT), and N-alkylguanidinium salts, specifically n-dodecylguanidinium salts, in varying ratios, along with optional additional biocides, to create strong, broad-spectrum biocidal agents for protecting technical materials from microbial infestation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If larger amounts of N-alkylguanidinium salts are used to achieve satisfactory antimicrobial results, then effectiveness against microorganisms is improved, but foaming occurs which makes use difficult or impossible
Solution Approach 1:
The patent combines N-alkylguanidinium salts with BIT and/or MIT to create a synergistic mixture. This merging of biocidal agents allows lower dosages of the guanidinium salt to be used while maintaining or enhancing antimicrobial effectiveness, thereby reducing foaming issues while achieving reliable microbial control.
Solution Approach 2:
The invention creates a composite biocidal system by formulating N-alkylguanidinium salts together with BIT and/or MIT. This composite approach leverages the complementary properties of each component: the broad-spectrum activity of BIT/MIT and the rapid action of guanidinium salts, achieving effective microbial protection at lower, non-foaming concentrations.
2Reliability
If very high dosage quantities of N-alkylguanidinium salts are used to achieve satisfactory antimicrobial results, then effectiveness against microorganisms is improved, but the cost and complexity of application increase
Solution Approach 1:
By merging N-alkylguanidinium salts with BIT and/or MIT in a formulated mixture, the patent achieves synergistic antimicrobial activity. This allows the use of lower dosage quantities compared to using high amounts of guanidinium salt alone, while maintaining or improving effectiveness against a broader range of microorganisms.
Solution Approach 2:
The invention changes the concentration parameters by formulating a mixture where BIT and/or MIT enable reduced dosages of N-alkylguanidinium salt. The synergistic interaction allows effective microbial control at optimized, lower concentrations, reducing the quantity of substance required while maintaining reliability.
3Ease of operation
If high water solubility of N-alkylguanidinium salts is utilized for easy application, then ease of operation is improved, but leaching occurs quickly in outdoor applications
Solution Approach 1:
The patent merges N-alkylguanidinium salts with BIT and/or MIT to create a balanced formulation. This combination allows the biocidal system to benefit from the water solubility and ease of application of the guanidinium salt while the BIT/MIT component provides enhanced stability and resistance to leaching, achieving both ease of operation and reliability in outdoor applications.
Data Source
AI summary
The invention relates to biocidal substances containing at least one isothiazolinone from the group consisting of 1,2-benzisothiazolin-3-one (BIT) and 2-methyl-4-isothiazolin-3-one (MIT) and at least one N-alkyl-guanidinium salt, to methods for the production thereof and to the use thereof for protecting against technical materials and products which can be infected by micro-organisms.