Skin Cleansing Composition with Segmented Oil Agents
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Solution Overview
Problem
Conventional makeup removers fail to effectively remove oil content from the skin and can leave residues, leading to a lack of freshness and reduced foamability of subsequent face washes, especially when dealing with persistent makeup cosmetics like foundations and waterproof mascaras.
Innovation Solution
A skin cleansing composition comprising specific oil agents with varying viscosities, nonionic surfactants with specific HLB values, polyhydric alcohols, and water ratios, which allows for complete removal of oil content without impairing the foamability of subsequent face washes, providing a fresh skin feel and excellent rinsability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high oil content makeup remover is used to remove persistent makeup cosmetics, then the makeup cosmetic can lift off the skin, but the oil content cannot be sufficiently washed off with water
Solution Approach 1:
The oil agent is divided into two components with different viscosities: component (A) with viscosity >30 mPa·s and component (B) with viscosity ≤30 mPa·s. This segmentation allows the higher viscosity component to provide strong makeup removal capability while the lower viscosity component ensures complete washing off, resolving the contradiction between effective removal and complete rinsability.
Solution Approach 2:
The patent changes the viscosity parameter of the oil agent by using a mixture of oil agents with different viscosities in specific ratios (A/B ratio from 0.05 to 30). This parameter change enables the formulation to achieve both strong detergency for persistent makeup removal and complete washing off without residue.
2Ease of operation
If excessive force is applied to extend the makeup remover, then the remover can be extended further, but a load is applied on the face and blending is insufficient
Solution Approach 1:
The patent optimizes the viscosity parameters of the oil agent components to achieve the right balance between extendability and blending. Component (A) with higher viscosity provides adequate extension, while component (B) with lower viscosity ensures smooth blending without requiring excessive force, thus resolving the contradiction between ease of extension and blending sufficiency.
3Reliability
If a makeup remover is used to remove persistent makeup cosmetics, then the makeup can be removed, but the skin lacks freshness and subsequent face wash foamability is reduced
Solution Approach 1:
The oil agent is segmented into two viscosity components that work together to ensure complete removal of oil content while maintaining skin freshness. Component (A) handles the tough persistent makeup removal, while component (B) ensures complete washing off without leaving residues that would reduce subsequent face wash foamability.
Solution Approach 2:
The patent uses a composite oil agent system combining two different oil agents with complementary properties. This composite approach ensures both effective removal of persistent makeup and complete rinsability, preventing the harmful effects of residue and foamability reduction while maintaining skin freshness.
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 effectively removes oil content from the skin, maintaining foamability and providing a fresh skin feel, while ensuring excellent detergency and rinsability.
Implementation Method 1
from 1 to 15% by mass of a nonionic surfactant having an HLB of 10 or more and having a residue obtained by removing a hydrogen atom from at least one hydroxyl group in sugar, reducing sugar, or polyglycerin as a hydrophilic group (C), from 1 to 15% by mass of a nonionic surfactant having an HLB of 8 or less (D)
Implementation Method 2
from 10 to 60% by mass of a polyhydric alcohol (E)
Data Source
AI summary
A skin cleansing composition comprising the following components (A), (B), (C), (D), (E), (F), and (G):(A) from 0.5 to 20% by mass of an oil agent having a viscosity at 30° C. of more than 30 mPa·s,(B) from 0.5 to 20% by mass of an oil agent having a viscosity at 30° C. of 30 mPa·s or less,(C) from 1 to 15% by mass of a nonionic surfactant having an HLB of 10 or more and having a residue obtained by removing a hydrogen atom from at least one hydroxyl group in sugar, reducing sugar, or polyglycerin as a hydrophilic group,(D) from 1 to 15% by mass of a nonionic surfactant having an HLB of 8 or less,(E) from 10 to 60% by mass of a polyhydric alcohol,(F) from 10 to 50% by mass of water, and(G) from 4 to 45% by mass of a nonionic surfactant having an HLB of 10 or more and having a polyoxyethylene chain as a hydrophilic group,wherein the mass ratio of the component (A) to the components (B), (A)/(B), is from 0.05 to 30, andthe ratio of the total mass of the components (A) and (B) to the total mass of the components (C), (D), and (G), ((A)+(B))/((C)+(D)+(G)), is from 0.1 to 1.5.