Multi-Phase Skin Care Composition for Sensory Balance
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Solution Overview
Problem
Current skin care products often fail to provide a smooth spreadability and fresh in-use sensory feeling due to the presence of non-volatile oils, which reduce the volatility of volatile oils, leading to an unpleasant greasy texture and decreased consumer acceptance.
Innovation Solution
A skin care composition comprising at least two immiscible oil phases dispersed in a continuous aqueous phase, with a volatile oil phase making up at least 80% of one oil phase, along with non-volatile silicone and hydrocarbon oils, to enhance sensory benefits and stability while maintaining a translucent appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-volatile silicones are increased to provide stable oil film formation and pleasant skin feel, then skin film stability is improved, but volatility of the oil phase decreases and fresh in-use feeling is lost
Solution Approach 1:
The oil phase is segmented into multiple components with different volatility characteristics. The composition includes volatile oils (cyclic silicone oils, hydrocarbon oils) that evaporate quickly to provide fresh feeling, and non-volatile silicones that remain to form a stable protective film. This segmentation allows both rapid evaporation and sustained film formation to coexist.
Solution Approach 2:
The patent optimizes the concentration parameters of different oil components. Specifically, it controls the ratio of volatile to non-volatile oils within specific ranges (e.g., cyclic silicone oil 1-20%, hydrocarbon oil 1-15%, non-volatile silicone 2-30%) to achieve the right balance between evaporation speed and film stability, transforming the quantitative composition to resolve the contradiction.
2Ease of operation
If volatile oils are used to provide quick evaporation and fresh cool feel, then in-use sensory feeling is improved, but the presence of non-volatile oils reduces their volatility and evaporation speed
Solution Approach 1:
The oil phase is divided into volatile components (cyclic silicone oils like cyclomethicone, hydrocarbon oils like isododecane) and non-volatile components (dimethicone, other silicones). The volatile segments evaporate quickly to provide immediate fresh cooling sensation, while the non-volatile segments provide sustained moisturizing and film-forming benefits without significantly impeding the evaporation of volatile components when used in optimized ratios.
Solution Approach 2:
The patent creates a composite oil phase system combining multiple oil types with complementary properties. The cyclic silicone oils provide volatility and spreadability, hydrocarbon oils enhance feel and volatility, and non-volatile silicones provide film stability. This composite approach allows the system to exhibit both rapid evaporation and sustained protective effects.
3Reliability
If skin care products contain oily compounds to improve skin health and appearance, then skin conditioning benefit is improved, but unpleasant oily or tacky feel is generated
Solution Approach 1:
The patent transforms the sensory properties by changing the physical parameters of the oil phase. It uses low-viscosity volatile oils (viscosity < 100 cSt at 25°C) that spread easily and evaporate quickly, converting the typical heavy oily feel into a light, refreshing sensation. The composition parameters are optimized to ensure smooth spreadability and a dry-down to a silky finish, eliminating tackiness while maintaining skin conditioning benefits.
Solution Approach 2:
The patent utilizes the phase transition from liquid to vapor of the volatile oil components. The cyclic silicone oils and hydrocarbon oils transition from liquid state during application to vapor state after application, providing an immediate fresh cooling sensation during the phase change. This phase transition mechanism allows the product to deliver oily compounds for skin conditioning while avoiding the unpleasant persistent oily feel through complete or near-complete evaporation.
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 composition provides a pleasant, smooth, and silky after-feel, improving skin and hair appearance, while maintaining stability and avoiding significant skin irritation, thus enhancing consumer acceptance and product aesthetics.
Implementation Method 1
Volatile oils such as low viscosity cyclic silicone oils are commonly used in cosmetic compositions for their good cosmetic properties, such as their pleasant feel on contact with the skin due to quick evaporation after they have been applied to skin
Implementation Method 2
non-volatile silicones are widely used in skin care products because of their pleasant skin feel qualities as well as their stable oil film formation on the skin which can prevent moisture evaporation from the skin
Data Source
AI summary
The present invention relates to a skin care composition comprising at least two oil phases dispersed in a continuous aqueous phase comprising a thickening agent, wherein a first oil phase of the oil phases has different composition from the other oil phase, and wherein the composition contains an emulsifier no more than 1.0%. The present invention also relates to a method of preparing a skin care composition comprising dispersing a first oil phase in a continuous aqueous phase comprising a thickening agent; and dispersing a second oil phase in the continuous aqueous phase; wherein composition of said first oil phase differs from composition of said second oil phase, and wherein the composition contains an emulsifier no more than 1.0%.