Nanoparticle-Stabilized Multi-Type Emulsion for Low-Viscosity Stability

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Solution Overview

Problem

Existing multi-type emulsion formulations are thermodynamically unstable due to internal pressure imbalances, leading to instability and the need for surfactants like PEG, which can cause skin issues, and there is a challenge in forming stable, low-viscosity formulations without residual feelings.

Innovation Solution

A multi-type emulsion composition using non-amphipathic nanoparticles to stabilize the dispersed phase, allowing for a PEG-free formulation with controlled viscosity by mixing a water part and oil part at room temperature, without additional surfactants.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If PEG surfactants are used to improve emulsion stability, then the emulsion capacity is enhanced, but harmful components are generated causing skin problems

Engineering Contradiction:

Improveemulsion stabilityVSAvoidskin irritation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent removes PEG surfactants from the formulation entirely, extracting the harmful substance while maintaining emulsion stability through alternative mechanisms involving non-amphipathic nanoparticles and specific oil-water phase ratios

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Non-amphipathic nanoparticles serve as intermediary stabilizers at the oil-water interface, replacing the function of PEG surfactants without producing harmful byproducts, thereby mediating between the conflicting requirements of stability and safety

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If viscosity and hardness are increased to prevent internal particle escape, then formulation stability is improved, but the product produces residual feeling on skin

Engineering Contradiction:

Improveformulation stabilityVSAvoidskin feel

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent changes the stabilization mechanism from relying on high viscosity/hardness to using interfacial stabilization by nanoparticles, allowing the formulation to maintain stability at lower, more skin-friendly viscosity levels

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The non-amphipathic nanoparticles provide localized stabilization at the dispersed phase interface, allowing the continuous phase to maintain lower overall viscosity while stability is enhanced at the critical oil-water boundary

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If heating is applied during preparation to improve emulsion formation, then mixing efficiency is enhanced, but thermal damage to ingredients occurs

Engineering Contradiction:

Improveemulsion formation efficiencyVSAvoidthermal damage

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The patent replaces thermal energy input with mechanical energy input (high-speed homogenization), substituting heating with mechanical mixing to achieve emulsification without thermally damaging heat-sensitive ingredients

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Reliability

If surfactant content is increased to improve stability, then emulsion capacity is enhanced, but the formulation produces residual feeling and requires higher concentrations

Engineering Contradiction:

Improveemulsion stabilityVSAvoidsurfactant concentration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Non-amphipathic nanoparticles act as intermediary stabilizers that are more effective per unit than conventional surfactants, allowing stability to be achieved at lower concentrations without residual feelings

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the stabilization approach from surfactant-based to nanoparticle-based, fundamentally altering how stability is achieved and allowing for reduced additive concentrations

Inventive Principle:

Principle #35Parameter changes

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 composition achieves enhanced stability and low viscosity, reducing thermal damage to ingredients and minimizing skin irritation, while maintaining a unique feel and wide temperature stability.

Implementation Method 1

the dispersed phase is surrounded by the non-amphipathic nanoparticles

Methodology Applied

Scientific EffectSurface tension: Surface Tension

Implementation Method 2

the internal pressure where the w/o is dispersed is higher than the pressure in the continuous phase (external phase) to create a force that causes the internal liquid to move to the outside

Methodology Applied

Scientific EffectOsmotic pressure: Osmotic Pressure

Data Source

PatentUS20250360065A1Low-viscosity multi-type emulsion composition

Publication Date: 2025.11.27 AMOREPACIFIC CORP

AI summary

A multi-type emulsion composition and a preparation method thereof are disclosed. The emulsion composition is a composition in which a water part and an oil part are mixed and emulsified, the water part includes a non-amphipathic nanoparticle dispersion, the oil part includes an emulsion and the emulsion includes an oil phase or silicone phase as an external phase, the emulsion composition includes the water part as a continuous phase and the oil part as a dispersed phase, and the dispersed phase is surrounded by the non-amphipathic nanoparticles.