Three-Phase Cosmetic Composition With Clear Stable Interfaces

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Solution Overview

Problem

Existing triphasic cosmetic compositions lack stability and clarity, often containing silicone oil or paraffin, and fail to meet consumer demand for naturally derived ingredients while maintaining effective makeup removal and skin/hair care properties.

Innovation Solution

A three-phase cosmetic composition comprising a lower aqueous phase with at least 50% glycerin, an intermediate non-siliconized oily phase with castor oil, and an upper non-siliconized oily phase with linear or branched C10-C20 alkanes, ensuring clear interfaces and effective makeup removal without synthetic oils.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If silicone oil or paraffin is used in triphasic compositions, then stability and interface clarity are improved, but natural ingredient content decreases and consumer acceptance worsens

Engineering Contradiction:
Improvephase separation stabilityVSAvoidsynthetic ingredient content
Core Design Contradiction:
Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters by replacing silicone oil and paraffin with vegetable-derived oils (castor oil, jojoba oil, argan oil) and adjusting the aqueous phase composition to achieve stable phase separation without synthetic ingredients. This parameter substitution resolves the contradiction between stability and natural ingredient content.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent uses readily available vegetable oils that are naturally derived and biodegradable, replacing persistent synthetic oils. These natural ingredients provide the necessary functional properties while being environmentally friendly and consumer-accepted, effectively substituting the harmful synthetic components.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Object-generated harmful factors

If alcohol is used in triphasic compositions to avoid silicone oil, then natural ingredient content is improved, but makeup removal effectiveness worsens

Engineering Contradiction:
Improvesynthetic ingredient contentVSAvoidmakeup removal effectiveness
Core Design Contradiction:
Object-generated harmful factorsVSReliability

Solution Approach 1:

The patent creates a composite oily phase combining multiple vegetable oils (castor oil, jojoba oil, argan oil) with complementary properties. Castor oil provides strong makeup removal capability, while jojoba and argan oils provide moisturizing and stabilizing effects. This composite natural oil system achieves both effective makeup removal and natural ingredient compliance.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent merges multiple vegetable oils with different functional properties into a unified oily phase system. By combining the solubilizing power of castor oil with the emollient properties of jojoba and argan oils, the composition achieves comprehensive makeup removal effectiveness while maintaining 100% natural ingredient status.

Inventive Principle:
Principle #5Merging (Combining)

3Object-generated harmful factors

If aqueous phase content is increased to meet consumer preferences, then natural ingredient content is improved, but phase separation clarity worsens

Engineering Contradiction:
Improvesynthetic ingredient contentVSAvoidinterface clarity
Core Design Contradiction:
Object-generated harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent introduces vegetable oils as intermediary substances between the aqueous and oily phases. These natural oils act as mediators that facilitate clear phase separation while maintaining high aqueous content. The vegetable oils provide the necessary interfacial properties to achieve clarity without requiring synthetic additives.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 stable, clear interfaces and effective makeup removal, suitable for skin and hair care, while being free from silicones and paraffins, meeting consumer preferences for natural ingredients.

Implementation Method 1

the lowest phase at rest is generally the aqueous phase, which is the densest, while at least one of the middle and upper phases is an oily phase

Methodology Applied
Scientific EffectDensity gradient: Density Gradient

Data Source

PatentEP4069182B1Three-phase cosmetic composition
Publication Date: 2026.03.25 LAB M&L SA

AI summary

The invention relates to a three-phase cosmetic composition comprising an aqueous lower phase, a non-silicone oily intermediate phase, and a non-silicone oily upper phase. The invention also relates to the cosmetic use of said composition for skin and/or hair care, skin and/or hair cleansing and/or skin and/or hair fragrance and/or makeup removal from the skin, in particular on the face, as well as to a cosmetic process using said composition.