Hydroxypropyl Cellulose Delivery Particles for Fabric Perfume Adherence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fabric treatment compositions face challenges in maintaining the longevity of perfume deposition on fabrics, particularly in surfactant-containing environments, where perfume can be washed off or leached from its carrier, and similar issues occur with other benefit agents, which are often expensive and used at low levels.
Innovation Solution
The use of hydroxypropyl cellulose as a delivery aid attached to particles via covalent bonds or entanglement, providing effective deposition on both cotton and polyester fabrics while resisting hydrolysis and enzyme attack, thereby enhancing the stability and longevity of the benefit agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If perfume is deposited onto fabric using conventional carrier systems, then the perfume can be delivered to the fabric surface, but the longevity of adherence is poor and the perfume can be washed off or leached during main wash
Solution Approach 1:
The invention uses a composite delivery system consisting of a particle core, a shell matrix containing the perfume, and a polysaccharide delivery aid coating. This multi-layer composite structure provides both deposition capability and wash fastness, resolving the contradiction between delivering perfume to fabric and maintaining its adherence during subsequent washing.
Solution Approach 2:
The polysaccharide delivery aid acts as an intermediary between the particle and the fabric surface. It facilitates deposition onto the fabric while also providing a protective layer that prevents leaching and washing off, thereby extending the duration of perfume adherence and improving reliability.
2Ease of manufacture
If cellulose-substantive polysaccharides are used as delivery aids, then deposition onto cellulose substrates is improved, but the polysaccharides are attacked by cellulase enzymes causing degradation
Solution Approach 1:
The invention modifies the chemical parameters of the polysaccharide by selecting specific types (such as hydroxypropyl methyl cellulose or carboxymethyl cellulose) that have different enzyme resistance properties compared to native cellulose. This parameter change allows the delivery aid to maintain deposition effectiveness on cotton while resisting degradation by cellulase enzymes.
3Ease of manufacture
If phthalate containing polymers are used as delivery aids for polyester, then deposition onto polyester is improved, but the polymers undergo hydrolysis causing degradation
Solution Approach 1:
The invention changes the chemical composition parameters of the delivery aid by selecting polysaccharides with different chemical stability profiles. These modified polysaccharides maintain the ability to deposit onto polyester fabrics but possess enhanced resistance to hydrolysis, preventing degradation and maintaining long-term stability in the fabric treatment composition.
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 hydroxypropyl cellulose-based delivery system ensures excellent deposition and soil release benefits on cotton and polyester blends, maintaining the longevity of the benefit agent and preventing hydrolysis and enzyme attack, thus improving the performance of perfume and other benefit agents in laundry applications.
Implementation Method 1
hydroxypropyl cellulose as a delivery aid attached to particles via covalent bonds or entanglement
Implementation Method 2
resisting hydrolysis and enzyme attack, thereby enhancing the stability and longevity of the benefit agent
Data Source
AI summary
The invention provides a benefit agent delivery particle comprising hydroxylpropyl cellulose. The benefit agent delivery particle may further comprise a non- polysaccharide polymer, preferably an aminoplast polymer. The benefit agent delivery particle may comprise a perfume. The invention also provides a process for the manufacture of the particles in which perfume oil is encapsulated using emulsion polymerization to form core-shell particles, (in the alternative the perfume may be adsorbed later) and, a further polymer layer is formed on the outer surface of the core shell-particles in the presence of the delivery aid.