Charged Surfactant Antiperspirant Formulations for Reduced Textile Staining
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Solution Overview
Problem
Conventional antiperspirant products, particularly those containing aluminum salts, often cause stubborn yellowish stains on clothing that are difficult to remove, leading to unsightly discoloration and reduced washability.
Innovation Solution
The use of charged surfactants, such as cationic and anionic quaternary ammonium compounds, in cosmetic and dermatological preparations to reduce staining and improve the washability of antiperspirant residues on clothing, specifically by adjusting the weight ratio of antiperspirant to surfactant and incorporating surfactants like palmitamidopropyltrimonium chloride.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aluminum salts are used as antiperspirant active substances, then antiperspirant effect is achieved, but stubborn yellowish stains are formed on clothing that are difficult to remove
Solution Approach 1:
The patent introduces charged surfactants as intermediary substances that mediate between the aluminum salts and the fabric. These surfactants interact with the aluminum salts to prevent direct staining of the fabric, and their charged nature allows them to bind with the aluminum compounds, reducing the formation of stubborn yellowish stains while maintaining the antiperspirant effect.
Solution Approach 2:
The patent changes the chemical parameters of the formulation by incorporating charged surfactants with specific charge characteristics. This parameter change modifies the interaction between antiperspirant residues and fabric, transforming the staining mechanism from direct aluminum salt deposition to a process where charged surfactants intervene, thereby reducing stain persistence and improving washability.
2Reliability
If conventional antiperspirant formulations are used, then antiperspirant function is provided, but the ability to wash out stains from clothing is poor
Solution Approach 1:
Charged surfactants serve as intermediary agents that facilitate the removal of aluminum salt residues during washing. The charged groups on the surfactant molecules interact with the aluminum compounds, making them more soluble and easier to rinse away from fabric, thereby improving washability without compromising the antiperspirant function.
Solution Approach 2:
The patent creates a composite formulation combining aluminum salts with charged surfactants. This composite material approach allows the synergistic interaction between the antiperspirant active substance and the surfactant, where the surfactant component enhances the washability of the overall formulation while the aluminum salts provide the antiperspirant effect.
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
Significantly reduces the formation and intensity of yellowish stains on clothing, enhancing the ability to wash out these stains, as demonstrated by reduced b values in the CIE L*a*b color space and visual evaluations, while maintaining skin tolerance and stability of the formulations.
Implementation Method 1
The invention comprises the use of charged surfactants in preparations with an antiperspirant effect for reducing staining in or on clothing
Implementation Method 2
charged surfactants, such as cationic and anionic quaternary ammonium compounds
Data Source
AI summary
Disclosed is a method of reducing or avoiding staining in or on clothing caused by a cosmetic or dermatological preparation comprising one or more antiperspirant substances and/or of improving the ability of stains in or on clothing which are caused at least in part by said preparation to be washed out from the clothing. The method comprises including in the preparation one or more cationic surfactants.