Co-granules with Cellulose Ether Coating for Low-Temperature Bleaching
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Solution Overview
Problem
Existing detergents and cleaning agents face challenges in maintaining bleaching performance and antimicrobial effectiveness at low temperatures, with sulfonimine and bleach activator granules often suffering from storage instability and discoloration, leading to reduced germ-killing efficacy below 30°C.
Innovation Solution
The development of co-granules coated with cellulose ether, containing cyclic sulfonimine and tetraacetylethylenediamine or decanoyloxybenzoic acid as bleach activators, which are stabilized by cellulose ether binders and coatings, allowing for stable storage and activation at low temperatures to produce peracetic acid for effective bleaching and antimicrobial action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If sulfonimine and bleach activator granules are used to achieve bleaching effect at low temperatures, then bleaching performance is improved, but storage stability deteriorates and granules discolor
Solution Approach 1:
The patent introduces a coating layer as an intermediary substance between the sulfonimine/bleach activator granules and the external environment. This coating acts as a protective barrier that prevents direct contact and chemical reactions between the granule components and moisture/oxygen, thereby maintaining storage stability while preserving the low-temperature bleaching activity of the core granule materials.
Solution Approach 2:
The invention creates a composite structure consisting of an inner core (sulfonimine and bleach activator granules) and an outer coating layer. This composite design allows the core to maintain its reactive properties for low-temperature bleaching while the outer coating provides stability and prevents discoloration during storage, effectively combining the benefits of both components.
2Reliability
If TAED together with percarbonate is used to achieve antimicrobial effect above 40°C, then germ-killing efficacy is improved, but effectiveness decreases significantly at lower temperatures
Solution Approach 1:
The patent modifies the chemical parameters of the antimicrobial system by introducing sulfonimine compounds that lower the temperature threshold for antimicrobial activity. This parameter change enables the TAED/percarbonate/sulfonimine system to effectively kill microbes at temperatures below 30°C, overcoming the temperature limitation of the conventional TAED/percarbonate system.
Solution Approach 2:
The invention creates a composite antimicrobial system combining TAED, percarbonate, and sulfonimine compounds. This composite formulation synergistically enhances the antimicrobial effect at low temperatures, where the sulfonimine compounds activate the percarbonate to form peracetic acid, which provides effective germ-killing action even below 30°C.
3Stability of the object's composition
If bleach activators are used in prefabricated granule form to ensure homogeneous incorporation, then formulation homogeneity is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the bleach activator into a separate granule core that can be independently manufactured and then coated. This segmentation allows for optimized formulation of the activator component while simplifying the overall manufacturing process, as the granule formation can be performed using standard wet granulation techniques followed by a coating step rather than complex multi-stage processing.
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 co-granules provide long-term storage stability, maintain bleaching performance, and ensure excellent antimicrobial effects even at temperatures below 30°C, significantly reducing microorganisms on treated surfaces.
Implementation Method 1
co-granules coated with cellulose ether... stabilised by cellulose ether binders and coatings
Implementation Method 2
activation at low temperatures to produce peracetic acid for effective bleaching and antimicrobial action
Data Source
AI summary
There are disclosed co-granules coated with hydroxymethyl cellulose and containing: b1) cyclic sulfonimine, b2) bleach activator selected from the group consisting of tetraacetylethylenediamine, decanoyloxybenzoic acid or mixtures thereof, and b3) carboxymethyl cellulose as binder, wherein the binder consists of the carboxymethyl cellulose of component b)3 which has a solubility of at least 1 g of carboxymethyl cellulose in 1 L of water at 25° C. and wherein the coating comprises hydroxymethyl cellulose in an amount of from 5 to 20 wt. % of the coated co-granules.