Silicone Cosmetic Emulsion Composition for Low-Viscosity Stability

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Solution Overview

Problem

Existing cosmetics using polyglycerin-modified silicones and aminoalcohol-modified organopolysiloxanes suffer from poor emulsion stability and large particle sizes, particularly when viscosity is low, and ethanol is present.

Innovation Solution

A combination of aminoalcohol-modified silicone and polyglycerin-modified silicone surfactants is used to stabilize emulsions and reduce particle size, even in the presence of ethanol.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If polyglycerin-modified silicone is used as a surfactant, then the cosmetic has a light feel and skin adhesion, but the emulsion particle size becomes large and emulsion stability deteriorates

Engineering Contradiction:

Improveskin adhesion and light feelVSAvoidemulsion particle size

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent combines polyglycerin-modified silicone (providing skin adhesion and light feel) with aminoalcohol-modified organopolysiloxane (controlling emulsion particle size and stability). This composite surfactant system resolves the contradiction by having each component fulfill its strength: polyglycerin-modified silicone maintains sensory properties while aminoalcohol-modified organopolysiloxane ensures fine emulsion particle size and stability.

Inventive Principle:

Principle #40Composite materials

2Shape

If viscosity is reduced for lighter cosmetic formulation, then the cosmetic feels lighter, but emulsion stability deteriorates

Engineering Contradiction:

Improveviscosity (lighter formulation)VSAvoidemulsion stability

Core Design Contradiction:

ShapeVSStability of the object's composition

Solution Approach 1:

The patent changes the chemical composition parameters by introducing aminoalcohol-modified organopolysiloxane with specific molecular structure (containing amino groups and alcohol groups) that provides steric stabilization and electrostatic repulsion. This allows the formulation to maintain low viscosity while achieving stable emulsion through molecular-level stabilization mechanisms rather than relying on high viscosity.

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If aminoalcohol-modified organopolysiloxane is used alone, then emulsion stability improves, but sufficient stability is not achieved without adding large amounts of silicone gelling agent or bentonite

Engineering Contradiction:

Improveemulsion stabilityVSAvoidformulation complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent merges the functions of multiple ingredients into a single aminoalcohol-modified organopolysiloxane molecule that simultaneously provides emulsion stabilization, viscosity control, and skin adhesion. This eliminates the need for separate silicone gelling agents or bentonite additives, simplifying the formulation while achieving sufficient emulsion stability.

Inventive Principle:

Principle #5Merging (Combining)

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 cosmetic formulation achieves excellent viscosity stability over time with small emulsion particle sizes, suitable for various cosmetic forms, including low-viscosity emulsions.

Implementation Method 1

Silicone surfactants are conventionally used widely as emulsifiers. In particular, polyglycerin-modified silicones show adhesiveness to the skin that is offered by the polyglycerin and have a light feel that is characteristic of silicones

Methodology Applied

Scientific EffectSurfactant action: Surfactant