Oil-Based Solid Cosmetic Formulation for Cleansing and Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing oil-based solid cleansing cosmetics are not satisfactory in terms of refreshing feeling after washing and cleansing property, and they lack quality stability while maintaining the properties of conventional oil-based solid cleansing cosmetics.
Innovation Solution
An oil-based solid cosmetic formulation containing a solid oil component with a high melting point, a liquid oil component, a nonionic surfactant with a specific HLB value, fumed silica, and a powder, where the components are balanced within specific ratios to enhance cleansing power, massage effect, and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oil-based solid cleansing cosmetic is formulated with conventional solid oils and surfactants, then it provides good compatibility with makeup and excellent stain removal, but it fails to provide satisfactory refreshing feeling after washing and has insufficient cleansing property
Solution Approach 1:
The patent applies parameter changes by carefully controlling the melting point of the solid oil component within 50-120°C and the HLB value of the nonionic surfactant within 5-13. These specific parameter ranges optimize the balance between solid structure maintenance and washing-off properties, enabling both excellent cleansing power and refreshing feeling after washing that conventional formulations fail to achieve
Solution Approach 2:
The patent uses composite materials by combining specific components in defined ratios: solid oil (1-30%), liquid oil (50-95%), nonionic surfactant (3-40%), powder (0.1-10%), and fumed silica (0.01-10%). This composite formulation synergistically improves cleansing property, washing-off property, and refreshing feeling, resolving the contradiction between effective cleansing and refreshing sensation
2Ease of operation
If the cosmetic maintains a solid form at room temperature for easy application and massage, then it does not drip when applied, but it becomes difficult to wash off completely and provides less refreshing feeling
Solution Approach 1:
The patent applies parameter changes by optimizing the melting point of the solid oil component to be within 50-120°C. This parameter range ensures the cosmetic remains solid at room temperature for easy application and massage, while melting at body temperature or with warm water to facilitate complete washing off, thus resolving the contradiction between ease of operation and ease of washing off
Solution Approach 2:
The patent introduces liquid oil (50-95%) as an intermediary component that facilitates the transition between solid form for application and liquid state for washing off. The liquid oil acts as a mediator that allows the cosmetic to maintain solid structure at room temperature while enabling easy removal with water or lukewarm water, solving the contradiction between ease of application and ease of washing off
3Reliability
If the cosmetic contains powder components for enhanced cleansing effect, then it improves makeup removal capability, but it causes sedimentation and poor quality stability
Solution Approach 1:
The patent introduces fumed silica (0.01-10%) as an intermediary dispersing agent that prevents powder sedimentation. The fumed silica acts as a mediator between the powder components and the oil phase, ensuring uniform dispersion and maintaining quality stability while preserving the enhanced makeup removal capability provided by the powder components
Solution Approach 2:
The patent uses composite materials by formulating a specific combination of powder (0.1-10%) and fumed silica (0.01-10%) within the oil-based matrix. This composite approach ensures that powder components remain uniformly dispersed without sedimentation, maintaining both improved makeup removal capability and quality stability throughout the product's shelf life
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 formulation provides a high cleansing power, excellent washing-off property, refreshing feeling after washing, and quality stability, preventing sedimentation of powders and maintaining uniform dispersion, thus improving the cosmetic's performance and appearance.
Implementation Method 1
fumed silica...preventing sedimentation of powders and maintaining uniform dispersion
Implementation Method 2
a nonionic surfactant having an HLB value of 5 to 13...excellent washing-off property
Implementation Method 3
a solid oil component having a melting point of 50 to 120° C.
Data Source
AI summary
A solid cosmetic which contains 1 to 30% by mass of (A) a solid oil component having a melting point of 50 to 120° C., 50 to 95% by mass % of (B) a liquid oil component, 3 to 40% by mass % of (C) a nonionic surfactant having an HLB value of 5 to 13, 0.1 to 20% by mass % of (D) a powder having a volume average particle diameter of 1 to 200 μm, and 0.1 to 10% by mass of (E) fumed silica is excellent in cleansing property, washing-off property and refreshing feeling after washing, and is also excellent in quality stability such as appearance and uniformity of composition.