Oxazolidine Fragrance Precursors for Dishwasher Odor Control
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Solution Overview
Problem
Automatic dishwashers experience unpleasant odors due to food residues and bacterial degradation products, which current dishwashing detergents fail to effectively combat, especially during long periods of non-use or when dirty dishes are stored.
Innovation Solution
Incorporating oxazolidine fragrance precursors into automatic dishwashing detergents that release fragrance aldehydes or ketones upon hydrolysis, effectively masking or neutralizing bad odors over several days by reacting with β-amino alcohols under typical dishwasher conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional fragrances are used in dishwashing detergents, then the dishwasher has a pleasant smell during use, but the bad odors develop again after long periods of non-use
Solution Approach 1:
The oxazolidine fragrance precursors are incorporated into the dishwasher detergent or care product in advance. These precursors remain dormant during normal operation and only activate when the dishwasher is not used for an extended period, automatically releasing the fragrance to mask odors before they become problematic.
Solution Approach 2:
The fragrance delivery system changes its chemical state from inactive precursor (oxazolidine) to active fragrance compound through hydrolysis. This parameter change is triggered by environmental conditions in the idle dishwasher, allowing the system to adapt its fragrance release characteristics based on operational status.
2Duration of action of stationary object
If oxazolidine fragrance precursors are added to detergents, then odor control duration is extended, but the detergent formulation becomes more complex
Solution Approach 1:
The detergent formulation integrates oxazolidine fragrance precursors as composite components within the existing detergent matrix. These precursors are chemically stable in the detergent formulation but become active under specific dishwasher conditions, combining multiple functions in a single material addition.
3Illumination intensity
If fragrances are released continuously, then bad odors are masked effectively, but the fragrance becomes less potent over time
Solution Approach 1:
The fragrance release occurs periodically rather than continuously. The oxazolidine precursors remain dormant during active dishwasher use and only release fragrance during extended idle periods when odors are likely to develop, creating a periodic activation pattern that maintains effectiveness.
Solution Approach 2:
The oxazolidine precursors automatically activate and release fragrance in response to environmental conditions in the idle dishwasher without requiring external triggers. The system self-regulates its fragrance release based on the operational status and environmental conditions within the dishwasher.
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 oxazolidine precursors significantly reduce or eliminate unpleasant odors in dishwashers, providing a longer-lasting fragrance and improved odor control, as demonstrated by reduced bad smell intensities in tests.
Implementation Method 1
Oxazolidine precursors capable of releasing a fragrance aldehyde or fragrance ketone upon hydrolysis
Implementation Method 2
The fragrance can be released again from these oxazolidine precursor compounds through hydrolysis. The conditions for the release are the typical environmental conditions that one encounters in an automatic dishwasher.
Data Source
AI summary
The invention relates to the use of oxazolidine odoriferous substance precursors, in particular in the form of automatic dishwasher detergents containing said oxazolidine odoriferous substance precursors, for indicating the presence of and/or controlling bad odors in dishwashers. The invention further relates to agents that are for use in dishwashers and contain said oxazolidone compounds as well as to methods for automatically washing dishes using said agents.