Emulsion Lotion Nanoparticle Size and Mass Ratio Optimization
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Solution Overview
Problem
Cosmetic lotions struggle to balance high oil content for nourishing and softening effects with the need for stability and a fresh, quick penetration sensation, as higher oil content typically leads to lower stability and impaired sensory properties.
Innovation Solution
An emulsion-type lotion comprising an anionic surfactant, aliphatic monoalcohol, polyol, and liquid oil agent, with a specific mass ratio and particle size range, which eliminates the need for thickening agents while maintaining stability and providing a fresh watery sensation and skin-finish effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of oil ingredient is increased to improve nourishing effect and softening sensation, then the stability of the lotion deteriorates
Solution Approach 1:
The patent changes the particle size parameter of the emulsion to a specific range (30-200 nm) and adjusts the mass ratio parameters (oil agent to anionic surfactant from 20 to 30, polyol content from 5 to 20% by mass, oil agent content from 5 to 30% by mass). These parameter changes enable the lotion to maintain stability while containing high oil content (5-30% by mass), resolving the contradiction between nourishing effect and stability.
2Stability of the object's composition
If a polymer or thickener is added to impart viscosity and stabilize oil ingredient, then the fresh watery sensation and quick penetration sensation are impaired
Solution Approach 1:
The patent extracts and eliminates the thickening agent component from the traditional lotion formulation. Instead of using polymers or thickeners to stabilize oil, the invention relies on the emulsion mechanism with anionic surfactant and polyol, achieving oil stabilization without adding substances that would impair the fresh watery sensation and quick penetration properties.
3Reliability
If the oil content is increased to provide softening and plumping effects, then the viscosity and texture of the lotion increase
Solution Approach 1:
The patent changes the particle size parameter to nanoscale (30-200 nm) and adjusts the mass ratio parameters, enabling the lotion to contain high oil content (5-30% by mass) while maintaining low viscosity and light texture. The emulsion particles in this specific size range provide softening and plumping effects without increasing the overall texture weight, resolving the contradiction between softening effect and texture lightness.
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 lotion achieves stability, low viscosity, high water content, and a nourishing effect, offering a fresh, quick penetration sensation similar to using both lotion and cream, while maintaining stability and sensory properties.
Implementation Method 1
an emulsion type lotion comprising: (a) an anionic surfactant; (b) an aliphatic monoalcohol; (c) a polyol; (d) an oil agent; and (e) water
Implementation Method 2
at least one anionic surfactant
Implementation Method 3
the (c) polyol comprises from 2 to 6 carbon atoms and from 2 to 4 hydroxyl groups
Data Source
AI summary
An emulsion type lotion comprising an anionic surfactant, an aliphatic monoalcohol, a polyol, an oil agent, and water, wherein contents of the polyol and the oil agent are, respectively, from 10 to 20% by mass and from 5 to 30% by mass based on a total mass; the polyol comprises from 2 to 6 carbon atoms and from 2 to 4 hydroxyl groups; and an average particle size of emulsion particles composing the emulsion is from 1 to 200 nm.