Antidandruff Agent Injection to Prevent Agglomeration
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Solution Overview
Problem
Existing hair care compositions containing zinc pyrithione often experience agglomeration issues, leading to undesirable product appearance and equipment sticking, particularly with larger particle sizes exceeding 400 microns, which current methods fail to adequately address.
Innovation Solution
A method involving the formation of an emulsion by mixing a cationic surfactant system and high melting point fatty compound with an aqueous carrier, followed by the injection of the antidandruff agent, such as zinc pyrithione, and optionally additional components like perfume, silicone, phenoxyethanol, and benzyl alcohol, to reduce agglomeration and improve deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zinc pyrithione is added to hair care compositions by conventional mixing methods, then the composition provides antidandruff benefit, but the zinc pyrithione forms agglomeration with larger particle sizes exceeding 400 microns
Solution Approach 1:
The patent applies preliminary action by pre-mixing zinc pyrithione with compatible ingredients (such as silicones or oils) before incorporating it into the final hair care composition. This pre-mixing step ensures uniform distribution and prevents agglomeration during subsequent manufacturing processes, maintaining both antidandruff efficacy and particle size uniformity.
2Reliability
If zinc pyrithione is added to hair care compositions by conventional mixing methods, then the composition provides antidandruff benefit, but the manufacturing equipment experiences sticking
Solution Approach 1:
The patent uses an intermediary substance (such as silicone or oil) that acts as a mediator between zinc pyrithione and manufacturing equipment. This intermediary coating on the equipment surface prevents sticking and facilitates smooth processing while allowing the zinc pyrithione to maintain its antidandruff functionality in the final product.
3Reliability
If zinc pyrithione is added to hair care compositions by conventional mixing methods, then the composition provides antidandruff benefit, but the product exhibits undesirable appearance
Solution Approach 1:
The patent applies preliminary action by pre-mixing zinc pyrithione with compatible ingredients (such as silicones or oils) before incorporating it into the final hair care composition. This pre-mixing step ensures uniform distribution and prevents agglomeration during subsequent manufacturing processes, maintaining both antidandruff efficacy and particle size uniformity.
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
This approach effectively minimizes agglomeration of antidandruff agents, particularly larger particles, resulting in improved product stability and appearance, as well as enhanced deposition and conditioning benefits.
Implementation Method 1
Mixing the cationic surfactant system, high melting point fatty compound and aqueous carrier to form an emulsion
Implementation Method 2
Adding the antidandruff agent to the emulsion by injection... provides reduced agglomeration of the antidandruff agent
Data Source
Figure 1~2
AI summary
Disclosed is a method of preparing a hair care composition comprising a step of injecting antidandruff agent, perfume and/or silicone, to an emulsion. The method of the present invention provides reduced agglomeration of the antidandruff agent selected from metal pyrithiones.