Stable Silica Capsule Formulation for Fragrance Delivery
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Solution Overview
Problem
Existing fragrance delivery technologies, such as encapsulation in polymeric shells, often fail to significantly enhance the performance of fragrance materials in consumer products, leading to ongoing needs for improved delivery methods that provide sustained and effective release in personal care and fabric care products.
Innovation Solution
A flowable, stable silica capsule formulation is developed, incorporating core-shell silica capsules encapsulating fragrance materials and a polymeric adjuvant like polydiallyldimethylammonium chloride or vinyl pyrrolidone/dimethylaminoethyl methacrylate copolymer, which maintains stability for at least 4 weeks with minimal separation, enhancing the delivery and sensory performance of fragrances in various consumer products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymeric encapsulation is used to protect fragrance material, then fragrance degradation and loss are prevented, but fragrance performance enhancement is insufficient
Solution Approach 1:
The invention uses a composite capsule structure with an inner polymeric shell for protection and an outer silica shell for enhanced performance. This dual-layer composite material approach combines the protective benefits of polymeric encapsulation with the performance-enhancing properties of silica, resolving the contradiction between stability and performance enhancement.
2Reliability
If silica encapsulation is used to prevent active ingredient release, then ingredient containment is improved, but delivery and release mechanisms are insufficient
Solution Approach 1:
The invention applies local quality by creating different functional zones within the capsule structure. The inner polymeric layer provides containment and protection, while the outer silica layer provides enhanced delivery and controlled release properties. Each layer has localized qualities optimized for its specific function, resolving the contradiction between containment and delivery.
3Productivity
If encapsulated fragrance is deposited in consumer products, then fragrance delivery is improved, but formulation stability and flowability are compromised
Solution Approach 1:
The invention employs parameter changes by carefully controlling the particle size, surface properties, and composition ratios of the dual-layer capsules. These parameter optimizations ensure that the capsules maintain both their fragrance delivery capability and their stability within the consumer product formulation, preventing aggregation and maintaining flowability.
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 stable silica capsule formulation ensures prolonged fragrance stability and improved deposition, maintaining fragrance intensity and performance in personal care, fabric care, and home care products, offering enhanced consumer experience and product efficacy.
Implementation Method 1
the adjuvant is a polydiallyldimethylammonium chloride, vinyl pyrrolidone/dimethylaminoethyl methacrylate copolymer, or a combination thereof
Implementation Method 2
polydiallyldimethylammonium chloride
Data Source
Figure 1~2
AI summary
A flowable, stable silica capsule formulation composed of a silica capsule suspension and an adjuvant for use in a personal care product, a beauty care product, a fabric care product, a home care product, a personal hygiene product, an oral care product is provided.