Polyhydroxy Surfactant Hair Care Composition for Anti-Dandruff Deposition
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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 a silicone compound, along with anti-dandruff agents like piroctone olamine or azole-based anti-fungal agents, enhances deposition by stabilizing the agents in micelles and reducing solubility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surfactants are used in hair care compositions, then cleansing benefits are provided, but anti-dandruff agents are rinsed away during the washing process
Solution Approach 1:
The patent introduces a specific intermediary substance (polyhydroxy fatty acid amide with particular molecular weight and hydroxyl content) that acts as a mediator between the anti-dandruff agent and the surfactant system. This intermediary stabilizes the anti-dandruff agent in the formulation and facilitates its deposition on the scalp while resisting rinsing away, thus resolving the contradiction between providing cleansing benefits and retaining anti-dandruff agents.
Solution Approach 2:
The patent applies parameter changes by specifying precise molecular weight ranges (500-5000 Da) and hydroxyl group contents (0.5-5.0 mmol/g) for the polyhydroxy fatty acid amide. These parameter specifications optimize the balance between surfactant efficacy and anti-dandruff agent retention, allowing the composition to achieve both cleansing benefits and improved anti-dandruff performance simultaneously.
2Reliability
If anti-dandruff agents are incorporated into hair care compositions, then anti-dandruff benefits are provided, but the agents are washed away during rinsing
Solution Approach 1:
The patent creates a composite material system by combining the polyhydroxy fatty acid amide with specific surfactants (anionic, non-ionic, amphoteric, or cationic) and anti-dandruff agents. This composite formulation approach allows the polyhydroxy fatty acid amide to reduce the solubility of anti-dandruff agents in the aqueous phase while maintaining their bioavailability on the scalp, thereby improving deposition and reducing wash-off during rinsing.
3Object-affected harmful factors
If mild surfactants are used in hair care compositions, then non-irritating and gentle properties are achieved, but deposition of anti-dandruff agents is insufficient
Solution Approach 1:
The patent resolves this contradiction by changing the parameters of the polyhydroxy fatty acid amide, specifically selecting molecular weights between 500-5000 Da and hydroxyl group contents of 0.5-5.0 mmol/g. These parameter optimizations enable the surfactant to maintain mildness and non-irritating properties while simultaneously improving its ability to deposit anti-dandruff agents on the scalp through enhanced micelle formation and stability.
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 anti-dandruff agents, providing enhanced anti-dandruff performance by retaining the agents on the scalp during rinsing.
Implementation Method 1
enhances deposition by stabilizing the agents in micelles
Implementation Method 2
reducing solubility
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-C4 alkyl groups or hydroxy-substituted C1-C4 alkyl groups; R 2CO is a linear or branched, saturated or unsaturated C12-C18 acyl group, a silicone compound, 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.