Slurry Powder Cosmetic Compositions for Uniform Binder Coating
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Solution Overview
Problem
Cosmetic powder compositions face challenges with uneven binder coating of particulate materials, leading to poor adhesion and uneven wear on the skin, and lack of hydration and SPF protection.
Innovation Solution
A slurry powder composition is developed by combining particulate materials with a binder composition and an aqueous-based composition containing a water-soluble or water-dispersible polymer, followed by evaporation to create a residue that enhances adhesion, hydration, and SPF protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If particulate materials are combined with binder composition using conventional methods, then the powder can be manufactured, but the binder coating is uneven resulting in poor adhesion and uneven wear
Solution Approach 1:
The patent introduces an aqueous slurry as an intermediary medium to uniformly distribute binder composition around particulate materials. The slurry acts as a carrier that ensures even coating of binder on each particle surface, eliminating the uneven coating problem of conventional dry mixing methods. This intermediary liquid phase allows controlled deposition of binder followed by evaporation to form uniform coating.
Solution Approach 2:
The patent changes the physical state of the binding system from dry powder mixing to aqueous slurry suspension. By converting the binder composition into a liquid slurry form with controlled viscosity and particle concentration, the system achieves uniform distribution and coating. The parameter change from solid-state mixing to liquid-state suspension enables precise control of coating thickness and uniformity.
2Reliability
If conventional binder compositions are used, then powder adhesion is achieved, but hydration and SPF protection are insufficient
Solution Approach 1:
The aqueous slurry composition serves multiple functions simultaneously: it acts as a binder carrier for adhesion, provides hydration through water content and humectants, delivers SPF protection via incorporated UV filters, and enhances skin benefits through additional active ingredients. This multi-functional slurry system eliminates the need for separate ingredients for each function, integrating them into a single composition.
3Ease of manufacture
If pressed powder is formulated without water-soluble polymers, then manufacturing is simpler, but resistance to breakage and cracking is reduced
Solution Approach 1:
The patent creates a composite structure within the pressed powder by incorporating water-soluble or water-dispersible polymers into the aqueous slurry before evaporation. These polymers form a binding matrix that holds particulate materials together, creating a composite material with enhanced mechanical strength. The polymer network provides structural integrity that resists breakage and cracking during application and wear.
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 solution results in improved skin adhesion, hydration, and SPF protection, with enhanced resistance to cracking and a better UVA/UVB ratio, providing a more uniform and effective cosmetic application.
Implementation Method 1
evaporating off the aqueous based composition to leave the particulate materials coated with the binder and the evaporation residue of the aqueous based composition
Data Source
AI summary
Slurry powder cosmetic composition comprising particulates coated with a binder composition and the evaporation residue of an aqueous based composition comprising at least one water soluble or water dispersible polymer, and a method for making the composition.