Perfume Microcapsule Deposition Polymer Coating
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Solution Overview
Problem
Existing benefit agents in consumer products, such as perfumes and fabric softening agents, face challenges in delivery efficiency due to physical or chemical characteristics, leading to aggregation and uneven deposition on surfaces, resulting in reduced effectiveness.
Innovation Solution
The development of perfume microcapsules with a specific deposition polymer coating and a process that adjusts the pH of the slurry to optimize the combination of cationic and anionic charges, reducing aggregation and enhancing even deposition across various surfaces like hair and fabrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cationic charged species are employed to increase deposition of encapsulates onto clothes, then deposition efficiency is improved, but aggregation level increases leading to visible clumps and inhomogeneous deposition
Solution Approach 1:
The patent introduces a specific deposition polymer as an intermediary substance that mediates between the cationic charged species and the encapsulates. This polymer coating on the encapsulates acts as a controlled interface that facilitates deposition onto fabric while preventing direct aggregation between encapsulates, thus resolving the contradiction between improving deposition efficiency and maintaining composition stability
Solution Approach 2:
The patent modifies the surface parameters of the encapsulates by coating them with a deposition polymer that has specific charge characteristics. This changes the electrostatic parameters at the encapsulate surface, enabling controlled interaction with fabric surfaces while preventing uncontrolled aggregation, thereby achieving both improved deposition and reduced clumping
2Reliability
If benefit agents are encapsulated to improve delivery efficiency, then delivery efficiency is improved, but agents may still be lost before or after application due to mechanical or chemical interactions
Solution Approach 1:
The patent creates a composite structure consisting of the benefit agent core, encapsulation shell, and deposition polymer coating. This multi-layer composite design provides both protection during storage and handling (reducing premature loss) and controlled delivery upon application (maintaining delivery efficiency), as each layer serves specific protective and functional purposes
3Reliability
If benefit agents are employed at high levels in consumer products, then effectiveness is increased, but cost increases and delivery efficiency decreases due to physical or chemical characteristics
Solution Approach 1:
The patent changes the physical parameters of the benefit agent by encapsulating it and coating with deposition polymer, which improves its delivery characteristics. This allows the same amount of benefit agent to be more effective, or achieves the same effectiveness at lower levels, thereby reducing the quantity needed and associated costs while maintaining or improving effectiveness
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
This approach results in high and even deposition profiles for benefit agents, minimizing aggregation and leakage, thereby maximizing their effectiveness and longevity on treated surfaces.
Implementation Method 1
adjusts the pH of the slurry to optimize the combination of cationic and anionic charges, reducing aggregation
Implementation Method 2
the aggregation problem is due to uncoated encapsulate attraction due to Van der Waals forces and bridging flocculation
Implementation Method 3
the aggregation problem is due to uncoated encapsulate attraction due to Van der Waals forces and bridging flocculation
Data Source
AI summary
The present application relates to particles and compositions, such as consumer products, comprising such particles as well as processes for making and using such particles and compositions comprising such particles. Such particles and compositions provide enhanced benefit agent delivery to a situs that is treated with such particles and compositions without the major aggregation issues that other particles can be subject to.