Structured Cleansing Composition for Perfume Retention Without Ethoxylates
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Solution Overview
Problem
Existing personal cleansing compositions using ethoxylated surfactants face issues with unwanted impurities like 1,4-dioxane, and there is a need for formulations that provide scent during and after cleansing without ethoxylated surfactants, while maintaining stability and ease of use.
Innovation Solution
A personal cleansing composition comprising a mixture of C12 and C13 alkyl sulfate anionic surfactants, a hydric solvent, and a specific ratio of surfactant to hydric solvent, which forms a structured lamellar phase, enabling a stable gel and microemulsion phase, enhancing perfume delivery and lather stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ethoxylated surfactants are used in personal cleansing compositions, then solubility, mildness to skin, and lather quality are improved, but unwanted impurities like 1,4-dioxane are generated requiring additional treatment processes
Solution Approach 1:
The patent removes ethoxylated surfactants from the formulation entirely, extracting the source of the harmful 1,4-dioxane impurity while maintaining the desired cleansing performance through alternative non-ethoxylated surfactant combinations
Solution Approach 2:
The patent converts the problem of impurity generation into a benefit by using sulfation processes that inherently avoid 1,4-dioxane formation, achieving both clean formulation and effective cleansing without requiring additional vacuum stripping treatment
2Ease of operation
If perfume is added to cleansing compositions to provide scent during and after cleansing, then consumer satisfaction is improved, but perfume is wasted and expensive when not properly retained on skin
Solution Approach 1:
The patent changes the chemical parameters of the surfactant formulation to create a structured lamellar phase that enhances perfume retention, allowing perfume to be effectively delivered to and retained on the skin rather than washed away
Solution Approach 2:
The patent creates a composite system combining specific surfactants, cosurfactants, and hydric solvents in defined ratios to form a stable microemulsion phase that carries and retains perfume molecules on the skin surface
3Stability of the object's composition
If the composition is made to form a structured lamellar phase for stability and perfume delivery, then lather stability and gel structure are improved, but formulation complexity increases
Solution Approach 1:
The patent optimizes specific parameters including surfactant to hydric solvent ratio (greater than 2.7), surfactant composition ratios, and temperature conditions to achieve the structured lamellar phase without requiring complex additional agents or multi-step processes
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 delivers enhanced perfume perception, bloom, and retention on the skin, along with improved lather stability and ease of use, without the need for ethoxylated surfactants.
Implementation Method 1
Personal cleansing compositions comprising sodium trideceth-2 sulfate and a hydric solvent were explored to provide microemulsion phases to deliver fragrance
Implementation Method 2
The composition is structured, and preferably at least a portion of the composition may be in a lamellar phase
Data Source
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AI summary
Described herein, personal cleansing compositions, methods and uses. Personal cleansing compositions can include a surfactant, a perfume, a hydric solvent, and water, wherein the composition is structured.