Low-Water Bleach Dispersion for Temperature-Stable Cleaning Agents
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Solution Overview
Problem
Bleaching agents in dosing systems for dishwashers and washing machines face stability issues due to temperature fluctuations, leading to phase separation and loss of activity, especially when exposed to temperatures between 10°C to 75°C, affecting their cleaning performance.
Innovation Solution
A chemically and physically stable bleach dispersion is achieved by formulating a cleaning agent with a water content below 5% using 1,3-propanediol as an organic solvent and suspended agents, which stabilizes the bleach against temperature fluctuations, incorporating oxygen bleaching agents like sodium percarbonate and controlling particle sizes below 100 μm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If bleach preparations are stored in dosing systems exposed to temperature fluctuations (10°C to 75°C), then the cleaning agent can be used for multiple wash cycles, but the bleach undergoes phase separation and loss of activity
Solution Approach 1:
The patent changes the physical-chemical parameters of the bleach preparation by reducing water content to below 5% and formulating it in an organic solvent system. This parameter change makes the bleach resistant to phase separation and activity loss under temperature fluctuations between 10°C to 75°C, enabling stable storage for multiple wash cycles.
Solution Approach 2:
The patent creates a composite bleach preparation by combining oxygen bleach (sodium percarbonate or sodium perborate) with organic solvents (1,3-propanediol, ethanol, or isopropanol) and suspending agents. This composite formulation achieves both chemical stability and physical stability against phase separation under varying temperature conditions.
2Stability of the object's composition
If water content in bleach preparations is reduced to below 5%, then temperature stability is improved, but formulation complexity increases
Solution Approach 1:
The patent applies parameter changes by drastically reducing water content to below 5% and substituting with organic solvents. This simplifies the formulation by eliminating the need for complex stabilization systems required in aqueous bleach, while achieving superior temperature stability.
3Stability of the object's composition
If oxygen bleach particle size is controlled below 100 μm, then dispersion stability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent changes the particle size parameter of oxygen bleach to below 100 μm, which improves dispersion stability in the organic solvent system. The low water content formulation naturally supports this fine particle dispersion without requiring complex stabilization mechanisms.
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 formulation maintains the cleaning agent's activity and stability over multiple wash cycles, ensuring effective bleaching performance without significant loss, even at high temperatures, and simplifies production with low recipe complexity.
Implementation Method 1
low-water or water-free bleach preparations can be stabilized in a matrix of organic solvents and suspended matter
Implementation Method 2
low-water or water-free bleach preparations can be stabilized in a matrix of organic solvents and suspended matter
Implementation Method 3
oxygen bleaching agents with perborates and percarbonates being used in particular in the area of automatic textile and dishwashing
Data Source
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AI summary
the invention relates to cleaning agents with a water content of less than 5 wt. %, comprising; a) 10 to 45 wt. % oxygen bleaching agent,b) 10 to 89.5 wt. % organic solvent, c) 0.5 to 5 wt.% suspension agent and dishwasher powder method using said cleaning agent.