Porous Core Particle Delayed Release System
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Solution Overview
Problem
Current fragranced products for skin, scalp, and hair lose their scent quickly after application, despite efforts to extend fragrance duration through various carriers and microencapsulation systems, leaving a persistent need for continuous release over extended periods.
Innovation Solution
A delayed release delivery system comprising hydrophilic core particles with surface pores, encapsulated by a polymer with a hydrophobic backbone and hydrophilic pendant groups, which blocks pores in water and unblocks them in its absence, allowing for a sustained release of fragrance or active ingredients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional fragrance carriers and microencapsulation systems are used, then fragrance intensity is improved initially, but fragrance duration deteriorates as scent is lost within minutes after application
Solution Approach 1:
The patent utilizes particles with porous structures that can absorb and retain fragrance materials. The porous structure provides large surface area and volume for fragrance storage, enabling both intense initial scent and extended release duration through controlled diffusion from the porous matrix.
Solution Approach 2:
The patent employs composite particle structures combining hydrophilic and hydrophobic phases. The hydrophobic interior phases trap fragrance materials while hydrophilic exterior phases control water interaction, creating a multi-phase composite system that regulates fragrance release over extended periods while maintaining intensity.
2Duration of action of moving object
If fragrance load is increased to extend duration, then fragrance duration is improved, but fragrance intensity deteriorates due to saturation effects
Solution Approach 1:
The patent creates particles with spatially varying properties - hydrophobic interiors for fragrance storage and hydrophilic exteriors for water interaction. This local quality differentiation allows high fragrance loading in the interior while maintaining controlled release kinetics at the surface, preserving both intensity and duration.
Solution Approach 2:
The patent introduces water-interacting hydrophilic phases as intermediaries between the fragrance-loaded hydrophobic core and the external environment. This intermediary layer controls the rate at which fragrance diffuses out, enabling extended duration without sacrificing initial intensity by regulating the release kinetics.
3Duration of action of moving object
If coatings and microencapsulation systems are used to increase duration, then fragrance duration is improved, but device complexity deteriorates
Solution Approach 1:
The patent combines fragrance absorption, water interaction control, and release regulation functions into a single integrated particle structure. By merging these functions into one composite material system rather than separate coating layers and encapsulation systems, the patent achieves extended duration while minimizing structural complexity.
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 system maintains fragrance release for an extended duration by retaining liquid within the particles in aqueous environments and gradually releasing it as water evaporates, providing a prolonged scent experience on skin, scalp, and hair.
Implementation Method 1
a polymer having a hydrophobic backbone and a plurality of hydrophilic pendant groups. At least some of the surface pores adjacent the hydrophilic pendant groups are blocked in the presence of water
Implementation Method 2
the polymer has a hydrophobic backbone and a plurality of hydrophilic pendant groups. At least some of the surface pores adjacent the hydrophilic pendant groups are blocked in the presence of water and unblocked in the absence of water
Implementation Method 3
a hydrophilic core particle having surface pores and a liquid contained therein
Implementation Method 4
a porous core particle having a porous surface, and a liquid absorbed therein
Implementation Method 5
gradually releasing it as water evaporates
Data Source
AI summary
A delayed release delivery system comprises a hydrophilic core particle having surface pores and containing a liquid. The particle is encapsulated in a polymer having a hydrophobic backbone and hydrophilic pendant groups. At least some of the surface pores adjacent the hydrophilic pendant groups are blocked in the presence of water and unblocked in the absence of water. The treated particle contains liquid in a weight ratio of the liquid to the porous core particle of at least 400:1.