Taurine Ionic Liquid in Solid Cleansing Bars

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Solution Overview

Problem

Incorporating taurine into solid cosmetic and personal care compositions, such as bar soaps, is challenging due to its tendency to precipitate or crystallize, leading to an abrasive texture and reduced effectiveness in maintaining skin hydration and barrier function.

Innovation Solution

A eutectic system comprising taurine and a Brønsted base like urea, which forms an ionic liquid that prevents taurine precipitation when combined with soap, maintaining moisture and preserving the composition's color and texture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If taurine is incorporated in effective quantities in bar soaps, then skin hydration and barrier function are maintained, but taurine precipitates or crystallizes on surfaces leading to abrasive texture

Engineering Contradiction:

Improveskin hydration maintenanceVSAvoidabrasive texture

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the physical state of taurine from solid crystalline form to dissolved ionic liquid form by adjusting temperature and composition parameters. The ionic liquid contains taurine dissolved in a eutectic mixture of urea and water, preventing crystallization while maintaining effective concentrations for skin hydration.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces urea as an intermediary substance that forms a eutectic mixture with water to create the ionic liquid medium. This intermediary system allows taurine to remain dissolved and prevents direct crystallization on the bar soap surface.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If taurine is incorporated in solid cleansing compositions, then skin barrier function is reduced, but incorporation leads to precipitation and reduced effectiveness

Engineering Contradiction:

Improveskin barrier functionVSAvoidtaurine incorporation effectiveness

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent changes the concentration and physical state parameters of taurine by forming an ionic liquid system. This allows higher effective concentrations of taurine to be incorporated in the solid bar soap without precipitation, maintaining skin barrier function through sustained release.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite ionic liquid material combining taurine, urea, and water in specific ratios. This composite system prevents phase separation and crystallization, ensuring uniform distribution and effectiveness of taurine throughout the solid cleansing composition.

Inventive Principle:

Principle #40Composite materials

3Reliability

If conventional cosmetic compositions include taurine, then skin hydration is maintained, but the composition cannot be formulated as a solid bar

Engineering Contradiction:

Improveskin hydrationVSAvoidsolid bar form

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The patent changes the temperature and composition parameters to create a solid bar formulation. The ionic liquid system remains stable in the solid bar form at room temperature but releases moisture and taurine effectively during use, maintaining skin hydration.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent makes the ionic liquid system serve multiple functions: it acts as both the solvent medium and the moisture source, while also preventing crystallization and enabling solid bar formulation. This multi-functional system resolves the contradiction between maintaining hydration and achieving solid form.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 ionic liquid system allows for effective incorporation of taurine in solid cleansing compositions, preventing crystallization, enhancing skin hydration, and maintaining the composition's properties, including color and moisture retention.

Implementation Method 1

A eutectic system comprising taurine and a Brønsted base like urea, which forms an ionic liquid that prevents taurine precipitation when combined with soap

Methodology Applied

Scientific EffectSolvation: Solvation

Implementation Method 2

A eutectic system comprising taurine and a Brønsted base like urea, which forms an ionic liquid

Methodology Applied

Scientific EffectEutectic system: Phase Change

Implementation Method 3

maintaining hydration of the skin, the incorporation of taurine may also contribute to maintenance of the skin barrier, reduction of inflammation, and/or reduction of skin irritation

Methodology Applied

Scientific EffectHydration: Absorption (physical)

Data Source

PatentEP3484440B1Solid cleansing compositions with taurine and methods thereof

Publication Date: 2022.10.26 COLGATE PALMOLIVE CO

AI summary

A solid liquid cleansing composition and methods of preparing the same are disclosed. The solid cleansing composition may include a soap and an ionic liquid. The soap may be a sodium soap, an ammonium soap, a potassium soap, a magnesium soap, a calcium soap, or a combination thereof. The ionic liquid may include a base, taurine, and/or water.