Hair Care Composition Using High Charge Density Cationic Polymer
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Solution Overview
Problem
Current hair care compositions, despite advancements, do not fully satisfy the need for improved cleansing and conditioning properties, particularly for damaged hair, as they often cause damage due to aggressive surfactants and lack optimal combination of conditioning agents for enhanced disentangling, volume, bounce, smoothness, and suppleness.
Innovation Solution
A hair care composition combining anionic, nonionic, amphoteric, or cationic surfactants with a cationic polymer of high charge density and both aminated and non-aminated silicones in an aqueous medium, applied to wet hair and rinsed, providing effective cleansing and conditioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If anionic surfactants are used for cleansing hair, then washing power is improved, but hair damage increases due to aggressive nature
Solution Approach 1:
The conditioning agent is segmented into multiple functional components: a cationic polymer (polymer I) providing detangling and protection, and silicone compounds (compounds II and III) providing smoothness and shine. This segmentation allows each component to address specific aspects of hair damage while maintaining overall cleansing effectiveness.
Solution Approach 2:
The invention uses a composite conditioning system combining a cationic polymer with specific silicone compounds. The polymer provides charge-based adhesion to damaged hair areas, while the silicones provide hydrophobic protection and surface smoothing. This composite approach creates synergistic effects that reduce surfactant aggression while maintaining cleansing power.
2Object-affected harmful factors
If conditioning agents are added to improve cosmetic properties, then hair smoothness and softness are enhanced, but composition complexity increases
Solution Approach 1:
The cationic polymer serves multiple functions simultaneously: it conditions sensitized hair through charge interaction, provides detangling benefits, and acts as a foam stabilizer. The silicone compounds provide both smoothness and protection against environmental damage. This multi-functionality reduces the need for separate additives, simplifying the overall composition despite the high performance requirements.
Solution Approach 2:
The invention specifies precise parameter ranges for the conditioning agents: the cationic polymer has a charge density of 3-10 meq/g and molecular weight of 1,000-1,000,000, while silicones are present at 0.1-10% by weight. These controlled parameters ensure optimal performance while maintaining composition stability and ease of manufacturing, preventing excessive complexity.
3Object-affected harmful factors
If multiple conditioning agents are combined for better conditioning effect, then hair disentangling and softness are improved, but formulation stability becomes more difficult to maintain
Solution Approach 1:
The cationic polymer acts as an intermediary between the anionic surfactants and the silicone compounds. Its positive charge allows it to interact with both the negatively charged surfactant micelles and the hydrophobic silicone molecules, creating a stable bridge that prevents phase separation and maintains homogeneous distribution throughout the aqueous formulation.
Solution Approach 2:
The conditioning agents are designed to provide continuous stabilization throughout the product shelf life and during application. The cationic polymer maintains charge-based interactions that prevent aggregation, while the silicones provide continuous hydrophobic protection. This continuous action ensures formulation stability from manufacturing through storage to final application on hair.
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 achieves improved volume, foaming, disentangling, and overall hair health by stabilizing and enhancing softness, suppleness, and bounce, while reducing combing force, as demonstrated in comparative tests.
Implementation Method 1
B) at least one cationic polymer with a charge density greater than 4 meq/g
Implementation Method 2
C) at least one aminated silicone
Implementation Method 3
D) at least one insoluble, non-aminated silicone
Implementation Method 4
A) at least one surfactant selected from the group consisting of anionic, nonionic, amphoteric, cationic surfactant
Data Source
AI summary
Composition for caring for keratin fibers and use thereof for cleansing and conditioning the keratin fibers, especially the hair, which includes A) a combination of an anionic surfactant and an amphoteric surfactant; B) at least one cationic polymer with a charge density greater than 4 meq/g; C) at least one aminated silicone; and D) at least one insoluble, non-aminated silicone.