Cationic Polysaccharide Stabilizes Borate Encapsulate Compositions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge lies in manufacturing liquid consumer product compositions that include borate compounds and encapsulates with polyvinyl alcohol, as aggregation occurs due to cross-linking, leading to poor stability and aesthetics, and existing methods fail to effectively prevent this aggregation.
Innovation Solution
Incorporating a cationic polysaccharide at specific stages during the formulation process to interact with hydroxyl sites of polyvinyl alcohol and borate compounds, reducing cross-linking and aggregation of encapsulates, thereby forming stable product compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If borate compounds and polyvinyl alcohol encapsulates are combined in liquid consumer product compositions, then enzyme stability and benefit agent delivery are improved, but aggregation occurs due to cross-linking between hydroxyl groups, resulting in poor product stability and aesthetics
Solution Approach 1:
The patent applies the intermediary principle by introducing a non-aqueous liquid carrier (such as glycol, glycerol, or propylene glycol) that acts as a mediator between the borate compound and the polyvinyl alcohol encapsulates. This liquid carrier interferes with the hydrogen bonding between hydroxyl groups of borate and polyvinyl alcohol, preventing cross-linking and aggregation while allowing the beneficial interactions to occur. The intermediary substance resolves the contradiction by enabling enzyme stability without causing product instability.
2Productivity
If borate compounds and polyvinyl alcohol encapsulates are combined, then benefit agent delivery is improved, but aggregation occurs leading to build-up on processing equipment and unacceptable product aesthetics
Solution Approach 1:
The non-aqueous liquid carrier serves as an intermediary that prevents direct interaction between borate compounds and polyvinyl alcohol encapsulates that would lead to aggregation. By disrupting the hydrogen bonding network, the intermediary allows the encapsulates to remain dispersed and functional, enabling effective benefit agent delivery without the harmful aggregation and equipment build-up that would otherwise occur.
3Reliability
If encapsulates with polyvinyl alcohol are used in borate-containing compositions, then enzyme stability is promoted, but cross-linking due to hydrogen bonding occurs between hydroxyl groups, resulting in poor product aesthetics
Solution Approach 1:
The non-aqueous liquid carrier acts as an intermediary that selectively interferes with the hydrogen bonding between borate hydroxyl groups and polyvinyl alcohol hydroxyl groups. This prevents the cross-linking that would cause aggregation and aesthetic defects, while still allowing the borate to perform its enzyme stabilizing function. The intermediary thus resolves the contradiction between maintaining enzyme stability and preserving product aesthetics.
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 use of cationic polysaccharides significantly reduces encapsulate aggregation, enhancing product stability and aesthetics by minimizing flocculation and allowing for the use of encapsulates with polyvinyl alcohol in borate-containing compositions without significant loss of performance.
Implementation Method 1
Without wishing to be bound by theory, it is believed that the aggregation is a result from cross-linking due to hydrogen bonding that can occur between hydroxyl groups (—OH) of the borate derivatives and hydroxyl groups of the polyvinyl alcohol.
Data Source
AI summary
Methods relating to making product compositions that include encapsulates, borate compounds, and a cationic polysaccharide, where the encapsulates include polyvinyl alcohol polymer. Compositions made from such methods. Encapsulate slurries.