Alkaline Detergent Scale Control via Threshold System
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Solution Overview
Problem
Conventional high alkaline detergents used in vehicle care and warewashing industries face challenges with heavy scale formation in hard water conditions, which is difficult to control, leading to undesirable effects such as calcium carbonate precipitation on surfaces.
Innovation Solution
A threshold system comprising a sulfonate/acrylate copolymer, an acrylate homopolymer, and a phosphonoalkane carboxylic acid is used to prevent scale formation, precipitation, and adhesion, integrated with an alkalinity source and surfactant system in a detergent composition, maintaining a pH of at least 10.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional alkaline detergents are used in hard water conditions, then cleaning effectiveness is achieved, but heavy scale formation occurs on surfaces
Solution Approach 1:
The patent introduces a threshold system comprising three components (sulfonate/acrylate copolymer, acrylate homopolymer, and phosphonoalkane carboxylic acid) that acts as an intermediary between the alkaline detergent and hard water minerals. This threshold system prevents direct interaction between calcium, magnesium, and iron salts with the detergent surface, thereby eliminating scale formation while preserving cleaning effectiveness.
Solution Approach 2:
The patent employs a composite threshold system made of three specific components working together: a sulfonate/acrylate copolymer, an acrylate homopolymer, and a phosphonoalkane carboxylic acid. This composite approach provides synergistic effects where each component contributes to different aspects of scale prevention, achieving superior performance compared to single-component systems.
2Object-generated harmful factors
If chelating agents and threshold agents are added to control scale, then scale formation is reduced, but the detergent composition becomes more complex
Solution Approach 1:
The patent applies local quality by concentrating the threshold control function in a specific, well-defined combination of three components rather than using multiple different types of agents throughout the formulation. This localized approach to scale control maintains simplicity in the overall detergent composition while effectively addressing scale formation.
3Reliability
If calcium, magnesium and iron salts precipitate in high alkaline detergent, then scale control is achieved, but crystals attach to cleaned surfaces causing undesirable effects
Solution Approach 1:
The patent converts the potential harm of mineral precipitation into a benefit by using the threshold system to control and direct the precipitation process. The threshold system ensures that calcium, magnesium, and iron salts remain in solution or precipitate in a controlled manner that does not adhere to cleaned surfaces, transforming a harmful process into a beneficial scale control mechanism.
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 detergent composition effectively reduces and inhibits scale formation and adhesion on surfaces, providing effective cleaning while being environmentally friendly by being substantially free of aminocarboxylates like NTA and EDTA, suitable for various cleaning applications.
Implementation Method 1
Chelating agents and/or threshold agents are often used in high alkaline detergents because of their ability to solubilize metal slats and/or prevent calcium, magnesium and iron salts from precipitating
Implementation Method 2
Chelating agents and/or threshold agents are often used in high alkaline detergents because of their ability to solubilize metal slats
Data Source
AI summary
A detergent composition for preventing scale on various surfaces includes a threshold system, a caustic and a surfactant system. The threshold system includes a sulfonate/acrylate copolymer, an acrylate homopolymer and a phosphonoalkane carboxylic acid with a sulfonate/acrylate copolymer to acrylate homopolymer weight ratio of between about 2:1 to about 1:2. The pH of the detergent composition is between about 10 and about 13.