Anti-Dandruff Shampoo Composition for Soluble Agent Deposition
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Solution Overview
Problem
Existing anti-dandruff shampoos struggle to efficiently deposit soluble anti-dandruff agents, with most of them being rinsed away, leading to inefficiency and waste of expensive active ingredients.
Innovation Solution
A hair care composition containing lower levels of surfactant combined with cationic polymers of specific molecular weight and charge density, enhancing the deposition of surfactant-soluble antidandruff agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional anti-dandruff shampoos are formulated with surfactants and soluble anti-dandruff agents, then the shampoo can clean hair and scalp, but most of the soluble anti-dandruff agents (98-99%) are rinsed away, resulting in poor deposition efficiency
Solution Approach 1:
The patent introduces coacervates as an intermediary system to bridge the gap between soluble anti-dandruff agents and the scalp surface. These coacervates act as carrier vehicles that temporarily hold the soluble agents and facilitate their transfer to the scalp during rinsing, preventing direct loss of the expensive active ingredients
Solution Approach 2:
The invention changes the physical state and delivery mechanism of soluble anti-dandruff agents by incorporating them into coacervate structures. This parameter change transforms the agents from a freely soluble form that rinses away to a controlled delivery system that deposits effectively on the scalp, achieving 1.4X to 3X higher deposition efficiency
2Reliability
If higher levels of soluble anti-dandruff agents are added to achieve better anti-dandruff efficacy, then treatment effectiveness may improve, but cost increases significantly due to the expensive nature of these agents
Solution Approach 1:
The coacervate system enables recovery and retention of soluble anti-dandruff agents that would otherwise be discarded during rinsing. By encapsulating the agents in coacervates, the system allows them to be delivered to the scalp and retained there, maximizing the utilization of each unit of expensive active ingredient
Solution Approach 2:
The coacervates provide self-service by automatically depositing the encapsulated soluble anti-dandruff agents onto the scalp during the normal rinsing process, without requiring additional application steps or higher concentrations of the active ingredients
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 a deposition efficiency 1.4X to 3X higher than control compositions, effectively retaining a significant portion of soluble agents on the scalp.
Implementation Method 1
Most often, the coacervate is formed upon dilution of the shampoo and as it forms, it entraps insoluble particulate agents
Implementation Method 2
anti-dandruff shampoos are formulated with anti-dandruff agents in combination with surfactants and aqueous systems
Data Source
AI summary
A hair care composition directed to 8-16% of one or more surfactants; 0.01-10% of one or more surfactant soluble antidandruff agents; 0.01-5% of one or more cationic polymer having a molecular weight (MW) of about 250,000 to about 2,600,000 g/mol and a charge density (CD) of from about 0.25 to about 7.0 meq/g; wherein CD + 8x10-7*MW - 1.5 ≥ 0 and wherein the composition has a deposition efficiency of from about 1.4X to about 3X that of a control composition wherein the control composition comprises 14% SLE1S, no polymeric constituents, 1% of the surfactant soluble antidandruff agent at a pH of about 6.