Personal Care Compositions Without Structurants
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Solution Overview
Problem
Conventional personal care compositions containing zinc-containing and pyrithione materials require structurants to prevent particulate aggregation and sedimentation, increasing manufacturing costs and complexity.
Innovation Solution
Formulating personal care compositions with zinc-containing and pyrithione materials at specific concentrations and particle sizes, achieving a Péclet Number less than 1, which allows for suspension without structurants, reducing opacity and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If structurants are added to prevent particulate aggregation and sedimentation, then stability of the composition is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes structurants from the personal care composition formulation while maintaining suspension stability through optimized particle size control (0.01-2.0 μm average diameter) and specific concentration ranges (0.001-0.02% zinc-containing material and/or pyrithione material), thereby simplifying the formulation complexity
Solution Approach 2:
The patent changes the particle size parameter of zinc-containing materials and pyrithione materials to a specific range (0.01-2.0 μm average diameter) and controls their concentration (0.001-0.02% by weight), which fundamentally alters the suspension behavior and eliminates the need for structurants
2Stability of the object's composition
If structurants are added to prevent particulate aggregation and sedimentation, then stability of the composition is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts/removes structurants from the formulation, thereby eliminating the cost associated with these additives while maintaining suspension stability through physical parameter optimization (particle size and concentration)
Solution Approach 2:
By optimizing particle size (0.01-2.0 μm) and concentration (0.001-0.02% by weight), the patent achieves stable suspension without requiring expensive structurant additives, thus reducing manufacturing cost
3Ease of manufacture
If zinc-containing material and pyrithione material are suspended without structurants, then manufacturing cost and complexity are reduced, but stability of the suspension may worsen
Solution Approach 1:
The patent achieves stable suspension without structurants by precisely controlling particle size (0.01-2.0 μm average diameter) and concentration (0.001-0.02% by weight), which creates optimal Brownian motion and prevents sedimentation through physical parameter optimization rather than chemical additives
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 compositions maintain effective antimicrobial efficacy and skin health benefits while being cost-effective and free of structurants, with zinc pyrithione particulates remaining suspended and maintaining stability over time.
Implementation Method 1
The personal care composition has a Péclet Number of less than 1. The average particle size of the particulates is about 0.5 μm.
Implementation Method 2
The at least one of the zinc-containing material and the pyrithione material is formed of particulates and suspended in the personal care composition. The personal care composition is substantially free of a structurant.
Data Source
AI summary
Personal care compositions include a zinc-containing material and/or a pyrithione material, and are substantially free of a structurant. Methods of making the personal care composition and for improving skin health are also provided herein.