Polyvinyl Alcohol Binder Co-Granules for Detergent Stability
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Solution Overview
Problem
Existing co-granules used in detergents and cleaning agents for textiles and surfaces are not stable in storage, tend to disintegrate after wet granulation, and may discolor over time, especially when containing cellulose ether as a binder.
Innovation Solution
The use of polyvinyl alcohol as the sole binder in co-granules, which allows for stable production through wet granulation and maintains the granules' color and structure during prolonged storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cellulose ether is used as a binder in co-granules, then the granules can be produced through wet granulation, but the granules are not stable in storage and tend to disintegrate
Solution Approach 1:
The patent changes the chemical composition parameters of the binder by replacing cellulose ether with polyvinyl alcohol. This parameter change maintains the wet granulation capability while fundamentally improving storage stability, as polyvinyl alcohol forms more stable granule structures that resist disintegration during storage.
Solution Approach 2:
The patent creates a composite granule structure where polyvinyl alcohol serves as the primary binder matrix, potentially combined with other stabilizing components. This composite approach leverages the adhesive properties of polyvinyl alcohol to achieve both manufacturability through wet granulation and long-term storage stability.
2Ease of manufacture
If cellulose ether is used as a binder in co-granules, then the granules can be produced through wet granulation, but the granules discolor over time during storage
Solution Approach 1:
The patent changes the chemical composition parameters of the binder by replacing cellulose ether with polyvinyl alcohol. This parameter change maintains the wet granulation capability while fundamentally improving storage stability, as polyvinyl alcohol forms more stable granule structures that resist disintegration during storage.
Solution Approach 2:
The patent creates a composite granule structure where polyvinyl alcohol serves as the primary binder matrix, potentially combined with other stabilizing components. This composite approach leverages the adhesive properties of polyvinyl alcohol to achieve both manufacturability through wet granulation and long-term storage stability.
3Strength
If siccative is added to co-granules with cellulose ether binder, then the granule structure is enhanced, but the mixture adheres to pipes and cannot be dosed properly
Solution Approach 1:
The patent changes the chemical composition parameters of the binder by replacing cellulose ether with polyvinyl alcohol. This parameter change maintains the wet granulation capability while fundamentally improving storage stability, as polyvinyl alcohol forms more stable granule structures that resist disintegration during storage.
Data Source
AI summary
Disclosed are coated or uncoated co-granules comprising the following:a) 10 to 40% by weight of cyclic sulfonimine,b) 20 to 60% by weight of bleach activator selected from the group consisting of tetraacetylethylenediamine, decanoyloxybenzoic acid or mixtures thereof,c) 0.1 to 5% by weight of organic acid in the form of the free acid and/or a salt thereof in partially neutralized form,d) 1 to 15% by weight of polyvinyl alcohol as a binder,e) 10 to 25% by weight of desicant selected from the group consisting of alkali metal sulfate, alkali metal carbonate, alkaline earth metal sulfate, alkaline earth metal carbonate, alkaline earth metal oxide, aluminum oxide, hydrates of these compounds or mixtures of two or more thereof,f) 0 to 0.5% by weight of dye and/or pigment, andg) 0 to 5% by weight of water,wherein the percentages relate to the sum of components a) to g) and the sum of components a) to g) is 100 percent.These co-granules are stable in storage over a longer period of time and contain ingredients which do not tend to discolor during storage or which, in the case of colored co-granules, do not tend to change color.