Cationic Polymer Coated Anionic Particulates for Hair Deposition
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Solution Overview
Problem
Existing hair care compositions fail to achieve effective deposition of anionic particulates on hair and scalp, which limits their conditioning and antidandruff benefits.
Innovation Solution
A hair care composition comprising cationic surfactants, high melting point fatty compounds, cationic polymers, and anionic particulates, including silica and zinc pyrithione, which are coated or premixed with anionic polymers to enhance deposition and stability, forming a gel matrix with an aqueous carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anionic particulates are incorporated into hair care compositions to provide conditioning and antidandruff benefits, then the functional benefits are improved, but the deposition effectiveness on hair and scalp remains insufficient
Solution Approach 1:
The patent introduces cationic polymers as intermediary substances that mediate between the anionic particulates (zinc pyrithione, silica, zinc carbonate) and the hair/scalp surface. These cationic polymers carry the anionic particulates on their surface, facilitating effective deposition and adhesion to the hair shaft and scalp, thereby resolving the contradiction between incorporating functional particulates and achieving sufficient deposition effectiveness
Solution Approach 2:
The patent creates composite particulate structures where anionic particulates are coated or premixed with cationic polymers, forming composite materials that combine the functional properties of the particulates (antidandruff, conditioning) with the deposition capabilities of the cationic polymer carriers. This composite approach enables simultaneous improvement of functional benefits and deposition effectiveness
2Reliability
If cationic polymers are used to carry anionic particulates, then deposition is improved, but the formulation complexity increases
Solution Approach 1:
The patent merges the cationic polymer carrier system with the anionic particulate formulation into a unified composition system. By combining these components in a single conditioner formulation, the patent achieves improved particulate deposition while managing formulation complexity through integrated design rather than separate systems
Solution Approach 2:
The patent optimizes formulation parameters including the ratio of cationic polymer to anionic particulate, molecular weight of the polymer, and concentration levels to achieve effective deposition while maintaining formulation stability and managing complexity. Parameter optimization allows balanced performance across multiple functions
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 deposition of anionic particulates, providing enhanced conditioning and antidandruff benefits, with increased levels of zinc pyrithione and zinc carbonate on the scalp, exceeding control deposition levels by up to 350%.
Implementation Method 1
anionic particulates which are coated or premixed by anionic polymers
Data Source
AI summary
Disclosed is a hair care composition comprising cationic polymers and anionic particulates. The composition of the present invention provides improved deposition of anionic particulates.