Mannosylerythritol Lipid Coated Pigments for Skin Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cosmetic pigments coated with silicone or fluorine compounds provide waterproofness but can lead to a dried-out skin feel and poor skin adhesion, while collagen-coated pigments have limitations due to their animal origin, and existing biosurfactants lack hydrophobicity, making them unsuitable for cosmetic use.
Innovation Solution
Coating pigment surfaces with mannosylerythritol lipid, a glucolipid derived from natural sources like olive oil, which offers both hydrophobicity and hydrophilicity, providing water-resistant properties and enhancing skin adhesion and moisturizing effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pigment surfaces are coated with silicone compound or fluorine compound, then waterproofness is improved and makeup avoids coming off, but skin adhesion becomes poor and skin feels dried out
Solution Approach 1:
The patent changes the chemical composition parameters of the coating material from silicone/fluorine compounds to mannosylerythritol lipid, which has different molecular structure and properties. This new compound maintains hydrophobicity for waterproofness while introducing hydrophilic groups that improve skin adhesion and moisturizing effects
Solution Approach 2:
The patent uses a composite coating approach by combining mannosylerythritol lipid with pigment surfaces, creating a hybrid structure that integrates the hydrophobic lipid portion for waterproofness and the hydrophilic mannose/sugar alcohol portions for skin compatibility and adhesion
2Ease of operation
If pigment surfaces are coated with collagen, then feeling of the pigments is improved, but usage is limited due to animal protein origin
Solution Approach 1:
The patent changes the source material from animal collagen to plant-derived mannosylerythritol lipid (from olive oil, soy oil, etc.), maintaining the moisturizing and softening effects while eliminating animal protein limitations and improving versatility for different skin types and consumer preferences
3Object-generated harmful factors
If existing biosurfactants are used, then biodegradability and environmental friendliness are improved, but hydrophobicity is poor making them unsuitable for cosmetic pigments
Solution Approach 1:
The patent modifies the molecular structure of biosurfactants by using mannosylerythritol lipid, which has a specific structure with fatty acid chains ( providing hydrophobicity) combined with mannose and sugar alcohol groups (providing hydrophilicity). This structural parameter change enables both environmental friendliness and suitability for cosmetic pigment applications
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 use of mannosylerythritol lipid-coated pigments results in cosmetic products with improved skin adhesion, long-lasting makeup, and a fresh, enriched skin feel, addressing the limitations of existing technologies while ensuring human safety and environmental friendliness.
Implementation Method 1
Mannosylerythritol lipid (MEL) has a structure similar to a ceramide that constitutes the sebum membrane of a human. Although conventional biosurfactants are not suitable for cosmetic pigments as they have poor hydrophobicity, mannosylerythritol lipid according to the present invention can provide pigments with water-resistant property
Implementation Method 2
mannosylerythritol lipid for coating the surfaces of the pigments is an amphipathic compound having both hydrophobicity deriving from lipid property and hydrophilicity deriving from a property of sugar
Data Source
AI summary
To provide cosmetic pigments that are human-body friendly with good skin adhesion and that provide good feeling, their production method, and cosmetics containing such cosmetic pigments which provide fresh and enriched feeling accordingly. Pigment surfaces are coated with mannosylerythritol lipid, which is glucolipids, consisting of mannose, sugar alcohol and a fatty acid as shown in the general expression(1) below: (Note: In the general expression, R1 and R2 denote aliphatic acyl group with carbon numbers 6 through 20, which can be either same or different. R3 and R4 denote hydrogen or acetyl group, which can be either same or different. n denotes an integer in the range of 2 to 4.)