Encapsulated Benefit Agent Purification for Low Formaldehyde Residue
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Solution Overview
Problem
Encapsulated benefit agents in personal care and fabric care compositions often contain residual formaldehyde by-products, which are difficult to completely remove and can increase over time, leading to formulation complexity and incompatibility with other components.
Innovation Solution
A process involving centrifugation and decantation to reduce the percentage of shell particles in benefit agent delivery compositions, combined with desolvation processes to manage by-product levels, resulting in compositions with dramatically lower residual formaldehyde levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If scavenger materials are introduced to remove residual formaldehyde, then formaldehyde levels are reduced, but formulation complexity increases and incompatibility with other raw materials occurs
Solution Approach 1:
The patent removes shell particles containing residual formaldehyde through centrifugation and decantation processes, extracting the harmful component physically rather than using chemical scavengers. This eliminates formaldehyde to below detectable levels without adding scavenger materials to the formulation.
Solution Approach 2:
The patent replaces chemical scavenging mechanisms with mechanical separation processes (centrifugation and decantation). Instead of using chemical reactions to remove formaldehyde, the invention uses physical separation to remove the shell particles that contain the formaldehyde, avoiding chemical incompatibility issues.
2Productivity
If encapsulated benefit agents are used to improve delivery efficiency, then benefit agent effectiveness is maximized, but residual formaldehyde from encapsulation materials accumulates over time
Solution Approach 1:
The patent performs formaldehyde removal through centrifugation and decantation before the encapsulated benefit agents are used in final products. This preliminary action prevents formaldehyde accumulation from occurring in the first place, rather than dealing with it after encapsulation.
Solution Approach 2:
The patent changes the physical parameters of the encapsulation slurry through centrifugation (applying centrifugal force) and decantation (separating based on density differences) to remove shell particles. These parameter changes enable separation and removal of formaldehyde-containing materials while preserving the encapsulated benefit agents.
3Stability of the object's composition
If shell particles are present in benefit agent delivery compositions, then encapsulation structure is maintained, but by-product levels increase and stability decreases
Solution Approach 1:
The patent applies partial removal of shell particles through centrifugation and decantation, achieving sufficient formaldehyde reduction without completely eliminating all encapsulation materials. This partial action is sufficient to stabilize formaldehyde levels while maintaining the benefit of encapsulation.
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 process effectively reduces formaldehyde levels in encapsulated benefit agents, improving their stability and compatibility within consumer products, enhancing their delivery efficiency and effectiveness.
Implementation Method 1
A process involving centrifugation and decantation to reduce the percentage of shell particles in benefit agent delivery compositions
Implementation Method 2
A process involving centrifugation and decantation to reduce the percentage of shell particles in benefit agent delivery compositions
Implementation Method 3
combined with desolvation processes to manage by-product levels, resulting in compositions with dramatically lower residual formaldehyde levels
Data Source
AI summary
The present application relates to encapsulated benefit agents, compositions comprising such encapsulated benefit agents and processes for making and using compositions comprising such encapsulated benefit agents that do not require or require a reduced amount of scavenger materials. Such encapsulated benefit agents, compositions comprising such encapsulated benefit agents are processed such that no or lower levels of scavenger materials are required.