Silicone Nanodisc Oil-in-Water Emulsion for Watery High-Powder Coverage
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Solution Overview
Problem
Existing oil-in-water emulsions struggle with maintaining watery texture and good spreadability while effectively blending large quantities of powder components for coverage, leading to reduced emulsion stability and poor feel in use.
Innovation Solution
Incorporating silicone nanodiscs formed by specific aqueous components and silicone-based surfactants, along with a dispersant like polyglycerin fatty acid ester, to stabilize the emulsion and enhance powder dispersibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If large quantities of powder components are blended into the oil phase to achieve covering performance, then cosmetic effects are improved, but emulsion stability deteriorates and wateriness is reduced
Solution Approach 1:
The patent introduces a specific dispersant as an intermediary substance that mediates between the powder components and the oil phase. This dispersant enables high powder content to be incorporated while maintaining emulsion stability, resolving the contradiction between quantity of powder and stability of the emulsion system.
Solution Approach 2:
The patent changes the chemical parameters of the oil phase by selecting specific oils with appropriate polarity and molecular structure that can accommodate high powder content without compromising emulsion stability. This parameter change allows the system to maintain both high powder loading and stability.
2Quantity of substance
If large quantities of powder components are blended into the oil phase to achieve covering performance, then cosmetic effects are improved, but feel in use is reduced with powderiness occurring
Solution Approach 1:
The dispersant acts as a mediator that prevents direct interaction between powder particles and the aqueous phase, reducing powderiness in the feel. This allows high powder content to be maintained while preserving a smooth, non-powdery texture during application.
Solution Approach 2:
The patent applies local quality by ensuring uniform distribution of powder particles throughout the oil phase with the help of the dispersant. This uniform distribution prevents localized powderiness and maintains consistent feel across the product application area.
3Stability of the object's composition
If water phase is thickened by blending associative thickener and thickening polysaccharide to improve stability and texture, then emulsion stability is improved, but watery texture and spreadability are reduced
Solution Approach 1:
The patent extracts the stability-function from the water phase thickening approach and relocates it to the oil phase through the dispersant system. This allows the water phase to remain thin and watery while the emulsion stability is maintained through the oil phase modifications, resolving the contradiction between stability and spreadability.
Solution Approach 2:
The dispersant in the oil phase acts as an intermediary that provides emulsion stability without requiring water phase thickening. This intermediary mechanism allows the product to maintain both stability and the characteristic watery texture with good spreadability of oil-in-water emulsions.
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 emulsion achieves a watery and well-spreading texture with excellent cosmetic effects, providing stable coverage and improved feel, despite high powder content.
Implementation Method 1
silicone nanodiscs having, as precursors, vesicles formed by a specific aqueous component and a specific silicone-based surfactant
Implementation Method 2
significantly improving the powder dispersibility in the oil phase by an oil-in-water emulsion cosmetic which is emulsified by silicone nanodiscs
Implementation Method 3
a specific compound is blended as a dispersant... (E-1) a polyglycerin fatty acid ester having three or more glycerin molecules
Implementation Method 4
a polyoxy alkylene-modified silicone... (B) a polyoxy alkylene-modified silicone
Data Source
AI summary
[Problem] An objective of the present invention is to provide an oil-in-water emulsion cosmetic having a watery and well-spreading texture in use and having excellent covering performance.[Solution] The oil-in-water emulsion cosmetic of the present invention contains (A) an aqueous component selected from monohydric alcohols and dihydric alcohols; (B) a polyoxyalkylene-modified silicone; (C) an oil; (D) a powder having a hydrophobized surface; and (E) a dispersant that is one or more compounds selected from (E-1) a polyglycerin fatty acid ester having three or more glycerin molecules, and (E-2) polyhydroxystearic acid, wherein the (A) aqueous component, in the case of being a monohydric alcohol alone, constitutes 1% to 15% by mass relative to the overall amount of the cosmetic, in the case of being a dihydric alcohol alone, constitutes 1% to 20% by mass relative to the overall amount of the cosmetic, and in the case of being a combination of a monohydric alcohol and a dihydric alcohol, a total amount thereof constitutes 1% to 45% by mass relative to the overall amount of the cosmetic.