Stabilized solid activated bleach composition and method of cleaning, sanitizing and/or bleaching
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Solution Overview
Problem
Existing solid bleach compositions with reactive components like peroxygen sources and bleach activators face stability issues, leading to premature reactions and reduced shelf life, especially when stored at elevated temperatures, making it challenging to formulate stable multi-use or multi-dispense products.
Innovation Solution
A stabilized solid activated bleach composition is developed using a binding system with an anionic surfactant and a sequestrant, which includes a peroxygen source, a bleach activating agent, and an alkaline solidification matrix, minimizing interaction between reactive components and maintaining stability by controlling water content below 0.5% to prevent premature reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If peroxygen source and bleach activating agent are combined in a single formulation, then convenience of use is improved, but stability deteriorates due to premature reaction
Solution Approach 1:
The formulation is segmented into distinct functional zones: hydrophobic domains containing the bleach activating agent (TAED) separated from aqueous domains containing the peroxygen source. This spatial segmentation prevents direct contact and premature reaction while maintaining both components in a single dispensable unit.
Solution Approach 2:
Surfactants act as intermediaries that mediate between the hydrophobic bleach activating agent and the aqueous peroxygen source. The surfactant molecules form bridges that allow controlled interaction only when water is introduced, preventing direct reaction during storage while enabling activation during use.
2Productivity
If reactive components are kept in close proximity for multi-dispensing, then productivity is improved, but loss of substance increases due to premature reaction
Solution Approach 1:
The formulation exhibits local quality variations with hydrophobic regions containing bleach activator and aqueous regions containing peroxide. This local differentiation allows the components to be in close proximity for multi-dispensing while preventing premature reaction through the hydrophobic-aqueous interface barrier.
3Ease of operation
If water content is increased to enable dispensing, then ease of operation is improved, but stability deteriorates due to premature reaction
Solution Approach 1:
The formulation utilizes parameter changes by maintaining very low overall water content (below 0.5%) while creating localized aqueous environments only when needed for dispensing. This parameter control allows the system to remain stable during storage but become dispensable when water is introduced at the point of use.
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 solution significantly enhances the shelf stability and availability of active oxygen in the composition, allowing it to remain effective for up to 2 weeks, even at elevated temperatures, and during multi-dispensing applications, ensuring prolonged stability and efficacy.
Implementation Method 1
The stabilized compositions employ a sequestrant and a binding system containing an anionic surfactant
Implementation Method 2
stabilized compositions employ a sequestrant and a binding system containing an anionic surfactant
Implementation Method 3
at least one alkaline solidification matrix including alkali metal carbonates and/or alkali metal silicates
Implementation Method 4
allowing multi-dispensing of the solid composition, containing a peroxygen source and a bleach activating agent
Data Source
Figure 1
AI summary
Stabilized compositions employing a sequestrant system and a binding system for improving shelf stability and dispensing stability of a solid activated bleach composition are disclosed. The compositions contain a peroxygen source and a catalyst activator which require generation of a peroxycarboxylic acid or other active oxygen sanitizing agent at a point of use. Stabilized compositions employ a sequestrant system including a phosphonic acid and/or dipicolinic acid sequestrant and a binding system comprising an anionic surfactant for a solid formulation of a catalyst activator and peroxygen source to provide shelf stability and dispensing stability for a activated bleach composition. Methods of formulating and use are further disclosed.