Interpenetrating Polymer Network Moisturizer for Non-Sticky Hydration
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Solution Overview
Problem
Traditional skin hydration methods, such as occlusive agents and humectants, face issues like comedogenicity, stickiness, and limited water attraction, failing to provide significant and immediate hydration, especially in dry weather conditions, and there is a need for a cosmetically suitable preparation with high humectant delivery to address dry and irritated skin.
Innovation Solution
The development of an interpenetrating polymer network (IPN) comprising a crosslinked polypeptide or polysaccharide, a branched polymer with a hydrophobic modification, and a linear polypeptide or polysaccharide, which forms a thixotropic gel with enhanced water binding and sensorial properties, allowing for high humectant delivery without stickiness, and is used to treat and prevent dry and irritated skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional occlusive agents and humectants are used for skin hydration, then skin moisture is improved, but comedogenicity and stickiness occur
Solution Approach 1:
The patent employs a composite material system consisting of an interpenetrating polymer network (IPN) formed by crosslinked polypeptide or polysaccharide combined with linear polypeptide or polysaccharide. This composite structure provides effective skin hydration while avoiding the comedogenicity and stickiness associated with traditional occlusive agents and humectants, as the IPN architecture enables controlled moisture delivery without forming a sticky film on the skin surface.
Solution Approach 2:
The patent utilizes parameter changes through the crosslinking degree and molecular weight of the polypeptide or polysaccharide components to optimize hydration performance. By adjusting the crosslinking parameters and polymer chain length, the formulation achieves high moisture retention without the stickiness characteristic of conventional humectants, transforming the physical-chemical parameters of the hydrating agents to eliminate harmful effects.
2Quantity of substance
If high concentration of humectants is used to provide immediate hydration, then skin moisture binding is improved, but stickiness and cosmetically unsuitable properties occur
Solution Approach 1:
The patent combines crosslinked polypeptide or polysaccharide with linear polypeptide or polysaccharide in an interpenetrating network structure. This composite material system enables high water binding capacity through the hydrophilic nature of the polymer chains while the crosslinked network architecture prevents the stickiness that would otherwise result from high humectant concentration, providing cosmetically suitable texture.
Solution Approach 2:
The patent applies local quality by creating regions of high water binding capacity within the IPN structure through the distribution of hydrophilic groups on the polymer chains, while the overall network maintains a non-sticky surface character. The crosslinked regions provide structural integrity and moisture retention, while the linear polymer regions provide hydration without stickiness, achieving localized optimization of different properties.
3Duration of action of stationary object
If traditional hydration methods are used, then skin moisture is maintained, but the effects are limited and do not provide significant hydration in dry weather
Solution Approach 1:
The patent uses a composite IPN material system that simultaneously achieves high hydration intensity and extended duration of action. The crosslinked polypeptide or polysaccharide provides long-term moisture retention through its stable network structure, while the linear polypeptide or polysaccharide delivers immediate hydration benefits, creating a dual-phase hydration effect that overcomes the limitations of traditional single-function moisturizers.
Solution Approach 2:
The patent creates a multi-functional hydration system where the IPN structure performs multiple functions: immediate surface hydration through linear polymer chains, long-term moisture retention through crosslinked network, and protection against transepidermal water loss. This universal hydration approach provides both significant immediate effects and sustained long-term benefits, addressing both hydration intensity and duration requirements.
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 IPN composition provides superior hydration, improves skin elasticity, and maintains moisture for extended periods, reducing the appearance of fine lines and wrinkles, while offering a comfortable and non-sticky application, effectively addressing the limitations of traditional hydration methods.
Implementation Method 1
The IPN composition provides superior hydration... while maintaining moisture for extended periods
Implementation Method 2
an interpenetrating polymer network made up of a crosslinked polypeptide or polysaccharide; a branched polymer with a hydrophobic modification; and a linear polypeptide or polysaccharide
Implementation Method 3
forms a thixotropic gel with enhanced water binding and sensorial properties, allowing for high humectant delivery without stickiness
Implementation Method 4
adding a mono-valent ion, di-valent ion or a combination thereof to the third phase to crosslink one or more polypeptide, polymer, or polysaccharide to form an interpenetrating polymer network moisturizing composition
Data Source
AI summary
Embodiments herein are directed to moisturizing compositions comprising interpenetrating polymer networks, methods of making moisturizing compositions and methods of using moisturizing compositions.