Hair Care Surfactant Composition for Anti-Dandruff Retention
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Solution Overview
Problem
Existing hair care compositions fail to efficiently deposit anti-dandruff agents onto the scalp due to rinsing away during the washing process, providing inadequate anti-dandruff benefits.
Innovation Solution
A hair care composition comprising a polyhydroxy fatty acid amide surfactant and an ethoxylated alkyl sulfate anionic surfactant, with a specific weight ratio, combined with anti-dandruff agents like piroctone olamine or azole-based agents, stabilizes and enhances deposition on the scalp.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surfactants are used in hair care compositions, then cleansing effectiveness is improved, but anti-dandruff agent deposition is insufficient due to rinsing away during washing
Solution Approach 1:
The patent uses a specific surfactant system comprising a polyhydroxy fatty acid amide (component A) in combination with other surfactants (components B, C, D, E) as an intermediary to enhance the deposition and retention of anti-dandruff agents on the scalp. Component A acts as a mediator that improves the adhesion of anti-dandruff agents to the scalp surface, preventing them from being rinsed away during the washing process.
Solution Approach 2:
The patent optimizes the concentration and ratio of different surfactant components to achieve optimal anti-dandruff agent deposition. Specifically, component A is present at 0.1-10% by weight, with preferred ranges of 0.5-5%, and the combination of surfactants is formulated to create optimal conditions for anti-dandruff agent retention on the scalp during rinsing.
2Object-affected harmful factors
If mild surfactants are incorporated to be gentle on the scalp, then scalp irritation is reduced, but anti-dandruff agent deposition efficiency decreases
Solution Approach 1:
The patent employs a composite surfactant system consisting of multiple components (A through E) where component A (polyhydroxy fatty acid amide) provides mildness and scalp gentleness, while the combination with other surfactants (anionic, betaine, amino, or polyglycoside surfactants) enhances anti-dandruff agent deposition. This composite approach allows the formulation to achieve both mildness and effective deposition simultaneously.
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 significantly improves the deposition of anti-dandruff agents, offering enhanced anti-dandruff performance by retaining them on the scalp during rinsing.
Implementation Method 1
a polyhydroxy fatty acid amide surfactant and an ethoxylated alkyl sulfate anionic surfactant, with a specific weight ratio, combined with anti-dandruff agents like piroctone olamine or azole-based agents, stabilizes and enhances deposition on the scalp
Data Source
AI summary
A hair care composition is disclosed comprising a polyhydroxy fatty acid amide surfactant of general formula (I): wherein R1 is a C1-C4alkyl groups or hydroxy-substituted C1-C4 alkyl groups; R2CO is a linear or branched, saturated or unsaturated C3-C10 acyl group, preferably C8-C10 acyl group, an ethoxylated alkyl sulfate anionic surfactant having a formula R3O(CH2CH2O)nSO3M, wherein R3 is an alkyl or alkenyl having from 8 to 18 carbon atoms; M is a solubilising cation comprising sodium, potassium, ammonium, substituted ammonium or mixtures thereof; n is the degree of ethoxylation of from 0.5 to 3, and from 0.01 to 10% by weight of an anti-dandruff agent selected from piroctone olamine, azole based anti-fungal agents and mixtures thereof, wherein the weight ratio of the ethoxylated alkyl sulfate anionic surfactant to the polyhydroxy fatty acid amide surfactant ranges from 1:10 to 10:1.