Cleavable Multi-Alcohol Microcapsules for Stable Perfume Release
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Solution Overview
Problem
The perfumery industry faces challenges in maintaining the stability of microcapsules containing odoriferous compounds in aggressive consumer product bases, leading to rapid loss of olfactive benefit due to volatility and physical dissociation.
Innovation Solution
The development of core-shell microcapsules using cleavable multi-alcohols as building blocks for the polymeric wall, incorporating covalent adaptable networks to enhance stability and controlled release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If polyurea and polyurethane-based microcapsules are used, then long lasting olfactory effect is achieved, but stability in aggressive consumer product bases deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the shell material by using polyesters with specific hydroxyl values (50-150 mg KOH/g) and controlled molecular weights (500-5000 g/mol). These parameter adjustments optimize both the durability for long-lasting olfactory effect and the chemical resistance to aggressive bases, resolving the contradiction between duration and stability.
Solution Approach 2:
The invention creates a composite shell structure combining polyester polymers with specific functional groups and controlled cross-linking densities. This composite approach integrates the mechanical strength needed for durability with the chemical resistance required for stability in aggressive environments, achieving both long-lasting effect and base stability simultaneously.
2Productivity
If microcapsules are designed for controlled release, then olfactive performance is improved, but physical dissociation in challenging bases increases
Solution Approach 1:
The patent employs flexible polyester shell films with controlled thickness and mechanical properties that can withstand the stresses of aggressive bases while maintaining controlled release functionality. The shell's flexibility allows it to adapt to environmental conditions without dissociating, preserving both delivery performance and structural integrity.
Solution Approach 2:
By adjusting shell thickness, cross-linking density, and polymer molecular weight parameters, the invention optimizes the balance between permeability for controlled release and mechanical strength for resistance to physical dissociation. These parameter changes enable simultaneous achievement of good delivery performance and stability in challenging bases.
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 microcapsules provide enhanced stability in challenging bases while maintaining effective delivery and olfactive performance of perfumes.
Implementation Method 1
The present invention is proposing a solution to the above-mentioned problem, by providing new microcapsules based on cleavable multi-alcohols using covalent adaptable networks based on reversible reactions.
Data Source
AI summary
Described herein is a process for a preparation of microcapsules based on cleavable multi-alcohols. Also described herein are cleavable multi-alcohol-based microcapsules. Also described herein are perfuming compositions and consumer products including such capsules, in particular perfumed consumer products in the form of home care or personal care products.