Oil-In-Water Cleansing Cosmetic for Rapid Phase Inversion
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Solution Overview
Problem
Existing oil-in-water cleansing cosmetic compositions face issues with slow blending with makeup grime, reduced stability, and inferior makeup removal performance due to phase inversion requirements and high oil content.
Innovation Solution
An oil-in-water cleansing cosmetic composition containing carboxylic acid-modified silicone, 3 to 80% oil agent, water, and a basic compound, with limited ionic surfactant content, allowing for quick phase inversion upon skin contact and enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high amount of oil is blended to facilitate phase inversion, then the blending speed with makeup grime is improved, but the stability and feel during use are reduced
Solution Approach 1:
The patent changes the chemical parameters of the oil phase by using specific oil agents (hydrocarbon oils, silicone oils, or fatty acid esters) with controlled molecular structures and properties. This allows achieving rapid phase inversion with lower oil content (3-80 mass%) compared to conventional formulations, thereby maintaining stability while improving blending speed.
Solution Approach 2:
The patent creates a composite system by combining specific oil agents with water and optional surfactants in an oil-in-water emulsion framework. This composite structure enables controlled phase inversion behavior and maintains compositional stability, resolving the contradiction between fast blending and stability.
2Speed
If a high amount of oil is blended to facilitate phase inversion, then the blending speed with makeup grime is improved, but the feel during use is reduced
Solution Approach 1:
The patent optimizes the physical parameters of the oil phase by selecting oil agents with specific viscosity ranges and molecular characteristics. This enables rapid phase inversion with reduced oil content, thereby achieving fast blending speed while maintaining a comfortable, non-sticky feel during use.
Solution Approach 2:
The patent applies different oil agent types (hydrocarbon oils, silicone oils, fatty acid esters) with locally optimized properties to specific functional requirements. This allows the formulation to achieve rapid phase inversion where needed while maintaining pleasant sensory characteristics in other aspects.
3Ease of operation
If oil-in-water cleansing cosmetic composition is used to provide refreshing feel, then the feel during use is improved, but the makeup removing effect is reduced
Solution Approach 1:
The patent changes the chemical composition parameters of the oil phase by using specific oil agents (hydrocarbon oils, silicone oils, or fatty acid esters) with optimized molecular structures. This enables the oil-in-water formulation to effectively dissolve and remove water-resistant makeup while maintaining the refreshing feel associated with water-based formulations.
Solution Approach 2:
The patent creates a composite emulsion system that combines water with specifically selected oil agents. This composite structure provides both the refreshing feel of water-based formulations and the effective makeup removal capability of oil-based formulations, resolving the contradiction between sensory comfort and cleaning performance.
4Reliability
If phase inversion is required for makeup removal, then the makeup removing effect is improved, but the time required for blending is increased
Solution Approach 1:
The patent optimizes the chemical parameters of the formulation by using specific oil agents with controlled polarity and molecular structure. This enables rapid phase inversion upon contact with skin moisture, reducing the time required for makeup removal while maintaining effective cleaning performance.
Solution Approach 2:
The patent formulates the product as a pre-stabilized oil-in-water emulsion with optimized composition ratios. This preliminary preparation allows the formulation to undergo rapid phase inversion when applied to the skin, eliminating the need for prolonged mixing time while ensuring effective makeup removal.
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 quickly blends with makeup, provides high makeup removal efficacy, and maintains stability without stickiness, offering a refreshing feel during use.
Implementation Method 1
The oil-in-water cleansing cosmetic composition mixes with oily makeup grime by phase inverting from an O/W type to a W/O type due to water evaporation during rubbing to remove the grime
Implementation Method 2
phase inverting from an O/W type to a W/O type due to water evaporation during rubbing
Data Source
AI summary
The present invention relates to an oil-in-water cleansing cosmetic composition, containing: (A) carboxylic acid-modified silicone that is liquid at 50°C; (B) 3 to 80 mass% of an oil agent relative to the total mass of the cosmetic composition; (C) water; and (D) a basic compound; where an amount of an ionic surfactant other than the carboxylic acid-modified silicone (A) that is liquid at 50°C is 10 mass% or less relative to the total mass of the cosmetic composition. The cleansing cosmetic composition according to the present invention quickly blends with makeup grime, has a high makeup removing effect, and has excellent stability.