HASE Emulsion Encapsulation for Odor Persistence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for encapsulating odorous active ingredients are limited in their ability to protect these substances from environmental degradation and ensure prolonged persistence, as they often require additional steps, are not compatible with all chemical structures, or rely on volatile and expensive compounds.
Innovation Solution
A method using Hydrophobically Alkali Swellable Emulsions (HASE) with a pH greater than 5 to encapsulate odorous active ingredients, which creates solvation cages that protect and slow the release of these ingredients, allowing for their use in both liquid and solid formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If odorous active ingredients are applied directly to skin or surface, then immediate scent effect is achieved, but chemical stability deteriorates and persistence is reduced
Solution Approach 1:
The patent encapsulates odorous active ingredients inside polymer microcapsules, creating a nested structure where the active ingredient is trapped within the polymer matrix. This nesting protects the ingredient from environmental degradation while enabling controlled release over time, thereby improving both persistence and chemical stability simultaneously.
Solution Approach 2:
The patent employs polymer shells (microcapsules) as flexible containment structures that enclose the odorous active ingredients. These thin film encapsulations provide protective barriers against oxidation and other environmental attacks while allowing gradual diffusion of the active ingredient, resolving the contradiction between protection and release.
2Reliability
If encapsulation techniques are used to protect active ingredients, then chemical stability improves, but additional manufacturing steps and complexity are required
Solution Approach 1:
The patent combines the encapsulation function and the thickening/stabilization function into a single polymer system (HASE or HEUR). This merging eliminates the need for separate encapsulation materials and thickening agents, reducing manufacturing complexity while maintaining protection and controlled release capabilities.
Solution Approach 2:
The patent uses polymers that simultaneously serve multiple functions: they act as encapsulation matrices, thickening agents, and stability protectants. This multi-functionality reduces the number of components and steps required in the formulation process, addressing the complexity issue while maintaining effective protection.
3Object-generated harmful factors
If volatile compounds are used to achieve scent effect, then immediate olfactory impact is achieved, but persistence is reduced and toxicological risks increase
Solution Approach 1:
The patent changes the physical state and release parameters of odorous active ingredients by encapsulating them in polymer matrices. This transformation converts rapidly evaporating volatile compounds into controlled-release systems, extending persistence while reducing the intensity and potential toxicity of vapor exposure.
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 method effectively traps odorous active ingredients, enhancing their stability and persistence by slowing down evaporation and release, making them suitable for various applications while avoiding the limitations of previous encapsulation techniques.
Implementation Method 1
containing hydrophobic groups. These emulsions make it possible to trap odorous active ingredients by encapsulation
Implementation Method 2
creates solvation cages that protect and slow the release of these ingredients
Implementation Method 3
slowing down their release kinetics, which will result in an increase in the duration of the effectiveness of the perfume
Data Source
AI summary
The invention relates to a novel method for formulating odoriferous active ingredients in order to protect them and slow down the evaporation process of said active ingredients. The method comprises using acrylic and thickening emulsions having a pH higher than 5 and containing hydrophobic groups in order to trap said active ingredients. The invention also relates to different embodiments of the active ingredients thus formulated: a mixture of said active ingredients with thickening emulsions in water, a dispersion of solid particles of said polymers and said active ingredients after acidification, and the dry solid particles obtained after water is removed. The invention further relates to the use of these different formulations in order to protect an active ingredient and to slow down the evaporation kinetics thereof.