Lyotropic Liquid Crystalline Surfactant Phase Capsule Deposition
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Solution Overview
Problem
Fragrance capsules in personal rinse-off compositions face difficulty in deposition onto skin and hair due to strong interactions with surfactants, which alter the capsule surface and reduce deposition efficiency.
Innovation Solution
Dispersing fragrance-containing capsules into lyotropic liquid crystalline surfactant phases before incorporation into consumer products, utilizing an oil-continuous liquid crystalline phase composed of anionic and cationic surfactants, enhances deposition by minimizing surface alterations and leveraging electrostatic, hydrogen/dipole, and adhesive forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fragrance capsules are dispersed directly into consumer products, then the formulation process is simple, but the deposition onto skin and hair is poor due to strong interactions with surfactants
Solution Approach 1:
The patent introduces a liquid crystalline phase as an intermediary medium between the fragrance capsules and the consumer product. This liquid crystalline phase acts as a mediator that protects the capsule surface from direct interaction with surfactants in the final product, thereby maintaining deposition performance while still allowing for straightforward formulation processes.
2Reliability
If polymers are added to enhance capsule deposition, then deposition performance improves, but the extent of enhancement is affected by surfactant presence and types
Solution Approach 1:
The patent changes the physical state and organizational structure of the surfactant system by forming a liquid crystalline phase. This parameter change creates a unique intermediate state that provides consistent deposition enhancement across different surfactant types and formulations, overcoming the limitations of polymer-based approaches that are sensitive to surfactant variations.
3Reliability
If fragrance capsules are dispersed into lyotropic liquid crystalline surfactant phases, then deposition performance is significantly enhanced, but the formulation process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-forming the liquid crystalline phase before incorporating the fragrance capsules. This preliminary step creates a favorable environment for capsule deposition that persists through the formulation process and final application, ensuring enhanced performance without requiring complex adjustments during subsequent processing steps.
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
Significantly improves the deposition and retention of fragrance on skin and hair, achieving higher fragrance release and substantivity compared to capsules dispersed alone or in traditional formulations.
Implementation Method 1
This approach not only takes advantage of electrostatic and hydrogen/dipole interactions but also viscous/tacky adhesive forces.
Implementation Method 2
This approach not only takes advantage of electrostatic and hydrogen/dipole interactions but also viscous/tacky adhesive forces.
Implementation Method 3
This approach not only takes advantage of electrostatic and hydrogen/dipole interactions but also viscous/tacky adhesive forces.
Data Source
AI summary
The present invention is a fragrance containing capsule composition dispersed into a lyotropic liquid crystalline surfactant phase as well as a consumer product base containing the same.