Anhydrous Cosmetic Encapsulation Particles
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Solution Overview
Problem
Existing cosmetic formulations face challenges in creating anhydrous solid compositions that effectively encapsulate beneficial agents, such as perfumes, to prevent moisture exposure and ensure controlled release, while maintaining a light texture and compatibility with other ingredients.
Innovation Solution
The development of solid anhydrous compositions featuring particles with a hydrophobic modified polysaccharide envelope, specifically C5-C20-alkenyl starch succinate, and a water-soluble carbohydrate, maltodextrins with a Dextrose Equivalent ranging from 4 to 20, which are spherical, have a low density, and include a structuring agent, allowing for complete encapsulation and controlled release of the beneficial agent upon contact with water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encapsulation particles are used to protect beneficial agents from moisture, then protection and stability are improved, but the composition may become heavy or dense
Solution Approach 1:
The patent modifies the shell composition parameters by using hydrophobic modified polysaccharides with specific molecular weights and compositions, achieving both protection and low density. The shell is designed with controlled thickness and porosity parameters to maintain lightness while providing effective moisture barrier protection.
Solution Approach 2:
The patent uses composite shell materials combining hydrophobic modified polysaccharides with other biodegradable polymers to create a lightweight yet protective structure. This composite approach allows the shell to provide effective moisture protection while maintaining low density for a light texture in the final composition.
2Duration of action of moving object
If encapsulation particles are used to control release of beneficial agents, then controlled delivery is improved, but the particle structure becomes more complex
Solution Approach 1:
The patent employs porous shell structures with controlled pore sizes and distributions to achieve controlled release of beneficial agents. The porous structure allows simple particle design while enabling sustained delivery through diffusion control, avoiding the need for complex multi-layer or mechanically actuated release mechanisms.
Solution Approach 2:
The patent uses flexible thin-film shells made from biodegradable polymers that can respond to environmental stimuli such as moisture or pH changes to control release. This approach provides controlled delivery through simple shell design rather than complex internal structures or mechanisms.
3Stability of the object's composition
If anhydrous solid composition is used for ease of use and storage, then stability and convenience are improved, but the formulation becomes more difficult to develop
Solution Approach 1:
The patent uses encapsulation particles as intermediary carriers that simplify anhydrous formulation development. The particles pre-encapsulate beneficial agents in stable structures, acting as ready-to-use building blocks that can be easily incorporated into anhydrous matrices, thereby reducing formulation complexity while maintaining stability.
Solution Approach 2:
The patent modifies physical parameters such as particle size distribution, shell composition, and moisture content to optimize the balance between stability and ease of formulation. By controlling these parameters, the patent achieves stable anhydrous compositions that are straightforward to manufacture and formulate.
4Weight of moving object
If particles have low poured powder density for light texture, then sensory properties are improved, but the encapsulation protection may be compromised
Solution Approach 1:
The patent employs flexible thin-film shells that provide effective encapsulation protection despite the low density of the overall particle structure. The thin-film design maintains protective integrity while contributing minimally to overall particle weight, achieving both light texture and reliable encapsulation.
Solution Approach 2:
The patent uses composite shell materials with optimized density and protective properties to create particles that are both lightweight and highly protective. The composite structure allows the shell to provide robust encapsulation while maintaining low overall particle density for a light, pleasant texture in the final 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
These compositions provide complete encapsulation of fragile or volatile molecules, maintaining stability and preventing moisture exposure, while ensuring a light texture and compatibility with other formulation ingredients, enabling immediate, gradual, and repeatable release of the beneficial agent on the skin or hair.
Implementation Method 1
said shell comprising at least one hydrophobic modified polysaccharide selected from C5-C20-alkenyl succinate starch
Implementation Method 2
said particles simultaneously having a poured powder density ranging from 300.0g/l to 600.0g/l and an absolute density greater than 1.0; the particles being spherical, and having a number mean diameter ranging from 1 to 30μm, and a volume mean diameter ranging from 5 to 150μm
Data Source
AI summary
The invention relates to a solid anhydrous composition comprising: (1) at least particles comprising a core containing at least one beneficial agent and a casing surrounding the core, the casing comprising at least one hydrophobic modified polysaccharide and at least one hydrosoluble carbohydrate and/or hydrosoluble polyol, the particles simultaneously having a poured powder density ranging from 300.0 g/l to 600.0 g/l and an absolute density of more than 1.0; and (2) at least one structuring agent. The invention also relates to a cosmetic care and/or sanitary and/or conditioning and/or perfuming and/or make-up method for keratinic matter, consisting in applying to the keratinic matter a composition as defined above. The invention further relates to a cosmetic method for the treatment of body odours and optionally human perspiration consisting in applying to keratinic matter a composition as defined above comprising at least one deodorant and/or an antiperspirant in free form and/or in encapsulated form.