Quat Disinfectant Composition for Hard Water Scale Control
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Solution Overview
Problem
Existing quaternary ammonium chloride-based disinfectants face challenges in maintaining efficacy while preventing scale formation when used with hard water, particularly in formulations requiring rapid tuberculocidal, mycobactericidal, and virucidal activity against pathogens like Mycobacterium tuberculosis, Adenovirus, and Polyomavirus.
Innovation Solution
Incorporating a biocidal quaternary ammonium compound, an antimicrobial amine, and an anionic scale inhibitor in a specific ratio, with the anionic scale inhibitor added in small amounts to prevent scale formation without compromising disinfecting activity, even when diluted with hard water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quaternary ammonium chloride-based disinfectants are used for rapid tuberculocidal and mycobactericidal activity, then disinfection efficacy is improved, but scale formation occurs when used with hard water
Solution Approach 1:
The patent introduces anionic scale inhibitors as intermediary substances that mediate between the quaternary ammonium chloride disinfectant and hard water. These scale inhibitors bind to calcium and magnesium ions in hard water, preventing them from reacting with the disinfectant to form scale, thereby maintaining both disinfection efficacy and preventing scale formation simultaneously
2Object-generated harmful factors
If anionic scale inhibitors are added to prevent scale formation, then scale inhibition is improved, but disinfecting activity may be compromised
Solution Approach 1:
The patent optimizes the concentration parameters of anionic scale inhibitors in the formulation. By carefully controlling the amount of scale inhibitor added and the ratio of active ingredients, the formulation achieves scale inhibition while maintaining sufficient disinfecting activity. The patent specifies particular concentration ranges that balance these two competing requirements
3Ease of operation
If quaternary ammonium chloride is used for broad-spectrum disinfection, then ease of operation is improved, but efficacy against mycobacteria and viruses is insufficient
Solution Approach 1:
The patent creates a composite disinfectant formulation that combines quaternary ammonium chloride with other biocidal agents having different mechanisms of action. This composite approach allows the formulation to maintain the ease of operation and broad-spectrum coverage of quats while adding specific efficacy against resistant pathogens like mycobacteria and viruses through the complementary actions of multiple active ingredients
Data Source
AI summary
The present invention relates to quaternary ammonium disinfecting cleaner compositions comprising a quaternary ammonium compound, an antimicrobial amine, and an anionic scale inhibitor. Beneficially, the compositions provide sanitizing efficacy without diminished performance and without scale formation when diluted with hard water. The compositions are suitable for inactivating and/or reducing infectious agents, particularly Norovirus, Adenovirus, and Polyomavirus.