Rhamnolipid Ester Composition for Odor Control and Sweat Reduction

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Solution Overview

Problem

Existing anti-perspirant and deodorant formulations do not effectively suppress body odor and sweating while maintaining skin hydration and avoiding skin irritation, and they may release harmful metals into the environment.

Innovation Solution

Rhamnolipid esters are synthesized through a process involving genetically modified microorganisms and specific coupling reagents, resulting in a mixture of mono- and di-rhamnolipid esters that can be incorporated into cosmetic formulations to reduce malodor and control sweating without causing skin irritation, and reduce environmental metal release.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional anti-perspirant formulations are used, then sweating control is achieved, but skin hydration is compromised and skin irritation occurs

Engineering Contradiction:
Improvesweating controlVSAvoidskin irritation
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention changes the chemical parameters of the active ingredient by using rhamnolipid esters with specific molecular structures (varying chain lengths and degrees of esterification) to achieve effective sweating control while reducing skin irritation compared to conventional aluminum-based compounds

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The invention employs composite rhamnolipid ester molecules that combine hydrophilic rhamnolipid cores with hydrophobic fatty acid chains, creating amphiphilic structures that can effectively control sweating while being gentler on skin

Inventive Principle:
Principle #40Composite materials

2Reliability

If conventional deodorant formulations are used, then body odor suppression is achieved, but harmful metals are released into the environment

Engineering Contradiction:
Improveodor controlVSAvoidmetal release
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The invention extracts and eliminates harmful metal components from conventional formulations by replacing aluminum-based antiperspirants with organic rhamnolipid ester compounds, thereby maintaining odor control functionality while removing environmental pollutants

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The invention uses biodegradable rhamnolipid esters that break down naturally in the environment, replacing persistent metal compounds with environmentally friendly alternatives that do not accumulate in ecosystems

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

3Reliability

If existing anti-perspirant substances are used, then sweating control is achieved, but formulation stability is compromised

Engineering Contradiction:
Improvesweating controlVSAvoidformulation stability
Core Design Contradiction:
ReliabilityVSStability of the object's composition

Solution Approach 1:

The invention optimizes physical parameters such as the carbon chain length of fatty acids and the degree of esterification to achieve the right balance between sweating control efficacy and formulation stability, preventing precipitation and phase separation

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 rhamnolipid esters provide effective odor control and sweat reduction, improve skin hydration, and decrease the release of zinc and aluminum into the environment, while maintaining formulation stability and mildness.

Implementation Method 1

rhamnolipid esters are synthesized through a process involving genetically modified microorganisms

Methodology Applied
Scientific EffectFermentation: Fermentation

Implementation Method 2

rhamnolipid esters... are able to achieve the set object of the invention... excellent properties in the reduction of malodors and control sweating

Methodology Applied
Scientific EffectSurfactant: Surfactant

Data Source

PatentUS12497426B2Rhamnolipid oligo-esters
Publication Date: 2025.12.16 EVONIK OPERATIONS GMBH
  • US12497426B2 patent drawing
  • US12497426B2 patent drawing
  • US12497426B2 patent drawing

AI summary

A rhamnolipid ester is useful as a cosmetic additive. A method of its production involves providing at least one rhamnolipid, reacting the at least one rhamnolipid with at least one coupling reagent, reacting the at least one rhamnolipid with a polyhydric alcohol having 1 to 32 carbon atoms, and optionally purifying the at least one rhamnolipid ester.