Polysuccinimide Microcapsule Shell Stability in Surfactant Bases
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The perfumery industry faces challenges in maintaining the olfactory benefit of odoriferous compounds due to their volatility, particularly 'top-notes,' which require stable delivery systems that can survive in aggressive surfactant-containing consumer product bases without degrading.
Innovation Solution
A process for preparing core-shell microcapsules by reacting a polyfunctional monomer with a polysuccinimide derivative during interfacial polymerization, forming a stable oil-in-water emulsion that encapsulates hydrophobic materials like perfumes, ensuring effective deposition and longevity.
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 surfactant-containing bases deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the shell material by using polysuccinimide derivatives with specific functional groups (carboxylic acid, hydroxyl, or amine groups) instead of conventional polyurea/polyurethane compositions. This parameter change enables the shell to resist degradation by aggressive surfactants while maintaining encapsulation functionality.
Solution Approach 2:
The invention creates a composite shell structure by reacting polysuccinimide derivatives with polyfunctional monomers to form a cross-linked network. This composite material combines the benefits of polysuccinimide's stability in aggressive media with the encapsulation properties of traditional microcapsule materials.
2Quantity of substance
If conventional microcapsule delivery systems are used, then perfume encapsulation is achieved, but deposition performance in challenging bases deteriorates
Solution Approach 1:
The patent modifies the shell's chemical parameters by incorporating polysuccinimide derivatives with specific functional groups that enhance adhesion to substrates. The carboxylic acid, hydroxyl, or amine groups provide improved deposition characteristics on various surfaces while maintaining perfume encapsulation capacity.
3Adaptability or versatility
If microcapsules are exposed to aggressive surfactant detergents, then consumer product functionality is achieved, but microcapsule physical dissociation increases
Solution Approach 1:
The patent converts the harmful effect of aggressive surfactants into a beneficial interaction by designing a shell with polysuccinimide derivatives that are specifically resistant to surfactant degradation. The shell's chemical structure is engineered to withstand or even interact favorably with surfactant environments, transforming the challenging condition into a compatible system.
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 yields microcapsules with improved stability and deposition performance, maintaining the olfactory benefit of perfumes in challenging consumer product bases, such as detergents, while ensuring long-lasting fragrance release.
Implementation Method 1
performing a curing step to form core-shell microcapsules in the form of a slurry
Implementation Method 2
dispersing the oil phase obtained in step a) into an aqueous solution comprising a polysuccinimide derivative to form an oil-in-water emulsion
Data Source
AI summary
Described herein is a new process for the preparation of polysuccinimide derivatives-based core-shell microcapsules. Also described are microcapsules, as well as perfuming compositions and consumer products including these microcapsules, in particular perfumed consumer products in the form of home care or personal care products.