Cleavable Multi-Alcohol Microcapsules for Aggressive Detergent Bases
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Solution Overview
Problem
The perfumery industry faces challenges with the rapid loss of olfactive benefit due to volatility of odoriferous compounds, particularly top-notes, and the instability of microcapsules in aggressive consumer product bases like surfactant detergents, necessitating improved stability and controlled release systems.
Innovation Solution
The development of core-shell microcapsules using cleavable multi-alcohols as building blocks, forming a polymeric wall through covalent adaptable networks, which provide stability and controlled release of hydrophobic ingredients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microcapsules are used to protect and control release of volatile compounds, then olfactive performance is improved, but stability in aggressive consumer product bases deteriorates
Solution Approach 1:
The patent employs composite wall materials comprising polyurea, polyurethane, or polyisocyanurate polymers combined with specific surfactants and stabilizers to create microcapsules that maintain structural integrity in aggressive consumer product bases while controlling the release of volatile compounds. The composite structure combines the protective encapsulation properties of polymeric walls with the stability-enhancing properties of surfactant-detergent combinations.
2Duration of action of moving object
If polyurea and polyurethane-based microcapsules are used, then long lasting olfactory effect is achieved, but stability in challenging bases with high surfactant levels deteriorates
Solution Approach 1:
The patent modifies the chemical composition parameters of the microcapsule wall by incorporating specific ratios of polyisocyanates, polyols, surfactants, and stabilizers to adjust the wall's resistance to surfactant detergents while maintaining the controlled release properties necessary for long-lasting olfactory effects.
Solution Approach 2:
The patent creates composite wall structures combining polymeric materials (polyurea, polyurethane, polyisocyanurate) with surfactants and stabilizers to achieve both durability of scent release and stability in challenging bases containing high levels of aggressive surfactants.
3Productivity
If microcapsules are designed for controlled release, then release rate control is improved, but physical dissociation in challenging bases increases
Solution Approach 1:
The patent applies different local properties to different parts of the microcapsule structure, with the polymeric wall providing mechanical strength and controlled release properties, while embedded surfactants and stabilizers provide localized protection against physical dissociation in surfactant-rich environments.
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 maintain stability in challenging bases and effectively deliver olfactive performance by encapsulating hydrophobic materials, such as perfumes, while ensuring controlled release.
Implementation Method 1
by providing new microcapsules based on cleavable multi-alcohols using covalent adaptable networks based on reversible reactions
Implementation Method 2
adding at least one polyfunctional monomer in a hydrophobic material, preferably a perfume, to form an oil phase; preparing a dispersing phase, wherein the dispersing phase is not miscible with the oil phase
Data Source
AI summary
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.