Multiphasic Liquid Compositions for Active Ingredient Deposition

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Solution Overview

Problem

Existing personal care and household care compositions face challenges in achieving high deposition and retention of active ingredients on substrates, particularly due to the rinsing out of water-soluble surfactants and active ingredients, leading to reduced effectiveness and waste.

Innovation Solution

The development of multiphasic liquid compositions comprising an active ingredient with limited water solubility, a water-soluble amphiphilic surfactant system, and an amphiphilic compound that forms a separate phase, reducing surface tension and improving deposition on substrates such as hair and scalp.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If water-soluble surfactants are used in compositions, then the composition can be easily rinsed off and applied, but the active ingredient and surfactant are washed away during rinsing, reducing deposition and retention

Engineering Contradiction:

Improveapplication easeVSAvoidactive ingredient deposition

Core Design Contradiction:

Ease of operationVSLoss of substance

Solution Approach 1:

The invention divides the surfactant system into two distinct functional segments: water-soluble surfactants (anionic, cationic, or nonionic) that provide application ease and rinsability, and water-insoluble surfactants (preferably fluorinated) that provide deposition and retention. This segmentation allows each component to perform its specific function without compromising the other, resolving the contradiction between ease of operation and substance retention.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention creates a composite surfactant system combining water-soluble and water-insoluble surfactants in specific ratios (at least 10% and up to 90% water-insoluble surfactant). This composite approach allows the system to exhibit both the rinsability of water-soluble surfactants and the deposition properties of water-insoluble surfactants, simultaneously achieving ease of operation and active ingredient retention.

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If water-soluble surfactants are used with soluble active ingredients, then the composition is easy to formulate, but the active ingredient is significantly reduced during rinsing since it is washed off with the surfactant

Engineering Contradiction:

Improveformulation simplicityVSAvoidactive ingredient retention

Core Design Contradiction:

Ease of manufactureVSLoss of substance

Solution Approach 1:

The water-insoluble surfactant acts as an intermediary that binds to the active ingredient and forms a surfactant-active ingredient complex. This complex has different solubility characteristics than the original active ingredient, allowing it to remain on the substrate during rinsing while the water-soluble surfactant is washed away. The intermediary surfactant thus mediates between the soluble active ingredient and the insoluble substrate, preventing loss during rinsing.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Quantity of substance

If coacervates are used to increase deposition of insoluble particulate agents, then deposition is improved, but particles are deposited indiscriminately to both scalp and hair causing undesirable aesthetics

Engineering Contradiction:

Improveactive ingredient depositionVSAvoidundesirable hair aesthetics

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The invention applies local quality by using the amphiphilic compound to create localized deposition zones. The compound's unique molecular structure (with both hydrophilic and hydrophobic regions) allows it to selectively bind active ingredients and deposit them preferentially on the scalp rather than on hair, achieving targeted deposition that improves aesthetics while maintaining effectiveness.

Inventive Principle:

Principle #3Local quality

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

Enhances the deposition and retention of active ingredients on substrates, improving the efficacy and efficiency of personal care and household care products by maintaining the active ingredient's action over time while reducing waste.

Implementation Method 1

improving the deposition of active ingredients for personal care or household care compositions

Methodology Applied

Scientific EffectSurface tension reduction: Surface Tension

Implementation Method 2

an amphiphilic surfactant system comprising a water-soluble surfactant

Methodology Applied

Scientific EffectMicelle formation: Surfactant

Implementation Method 3

an amphiphilic compound that forms a separate phase

Methodology Applied

Scientific EffectPhase separation: Phase Change

Data Source

PatentUS20240299273A1Multiphasic liquid compositions for improved deposition of active ingredients

Publication Date: 2024.09.12 SPECIALITY OPERATIONS FRANCE

AI summary

The present invention generally relates to the technical field of multiphasic liquid compositions comprising an active ingredient, and in particular, to multiphasic liquid compositions demonstrating improved deposition of an active ingredient. In certain embodiments, the compositions can be used as personal care compositions or household care compositions.