Silicone Deposition in Conditioning Shampoo via Amino-Functionalized Polymers
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Solution Overview
Problem
Conventional cosmetic cleaning agents often fail to provide a satisfactory care effect for hair due to the short exposure time and rinsing off of active ingredients, leading to undesirable hair damage and dryness, despite increased amounts of conditioning ingredients not offering significant benefits.
Innovation Solution
A cosmetic cleaning agent combining anionic surfactants, cationic polymers, siloxane polymers with multiple functional groups, and polydimethylsiloxane, which enhances silicone deposition on hair fibers, providing long-lasting care and protection without significantly increasing ingredient quantities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of conditioning ingredients is increased, then the care effect should be improved, but more ingredients are rinsed away unused and stabilization requires even more active ingredients
Solution Approach 1:
The invention changes the chemical parameters of the silicone by introducing a specific functional group (amino group with pKa 8-11) that alters its interaction with hair and rinse water. This parameter change enables the silicone to maintain conditioning effectiveness at lower concentrations and resist rinsing away, resolving the contradiction between care effect and substance loss
Solution Approach 2:
The invention creates a composite functionality by combining the conditioning properties of silicone with the adhesion properties of amino groups. This composite material approach allows the silicone to bind more effectively to hair and resist rinsing, achieving better care effect without proportionally increasing the amount of conditioning ingredients needed
2Productivity
If conventional shampoos are used for frequent cleansing, then cleaning performance is achieved, but lipids and proteins are removed causing hair damage and dry scalp
Solution Approach 1:
The amino-functionalized silicone acts as an intermediary substance between the anionic surfactant (cleaning agent) and the hair structure. It mediates the interaction by providing a bridging function: the amino group binds to negatively charged hair surfaces while the silicone portion provides conditioning, thus enabling effective cleaning without direct harsh interaction between surfactants and hair structural components
Solution Approach 2:
The invention converts the typically harmful effect of anionic surfactants stripping lipids and proteins into a beneficial process by introducing amino-functionalized silicone that selectively binds to the negatively charged hair surface. This transforms the harsh cleansing action into a controlled deposition process where the silicone protects hair while allowing effective dirt 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 solution results in improved hair smoothness, reduced friction during mechanical treatment, and enhanced combability, while maintaining mildness and stability, with the silicones forming a sustainable coating that protects hair fibers and scalp.
Implementation Method 1
silicone deposition on hair fibers can be increased by combining two specific silicone types
Implementation Method 2
cosmetic cleansers typically contain surfactants or surfactant mixtures... at least one cationic polymer
Data Source
AI summary
The present invention relates to a hair care cosmetic cleaning agent with improved silicone deposition on the hair fibers, which contains, in addition to at least one anionic surfactant and at least one cationic polymer, a specific mixture of two different silicones.