Polyglyceryl-10-stearate Emulsifier for Cosmetic Microbiological Stability
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Solution Overview
Problem
Cosmetic and dermatological preparations face challenges in achieving microbiological stability and skin compatibility while minimizing the use of preservatives, as existing emulsifiers often require high concentrations to maintain stability, leading to potential skin irritation and allergic reactions.
Innovation Solution
The use of polyglyceryl-10-stearate as an emulsifier in cosmetic or dermatological preparations, with concentrations less than 6% by weight, in combination with antimicrobial substances like piroctone olamine and benzethonium chloride, to enhance microbiological stability and reduce preservative content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high concentrations of conventional emulsifiers are used to maintain emulsion stability, then emulsion stability is improved, but skin irritation and allergic reactions increase
Solution Approach 1:
The patent changes the chemical parameters of the emulsifier system by using polyglyceryl-10-stearate with specific molecular structure and properties. This emulsifier achieves effective stabilization at lower concentrations (0.1-2.8% by weight) compared to conventional emulsifiers, thereby reducing the harmful effects on skin while maintaining emulsion stability.
Solution Approach 2:
The patent employs a composite emulsifier system combining polyglyceryl-10-stearate with antimicrobial substances (piroctone olamine and/or benzethonium chloride). This composite approach provides dual functionality: emulsion stabilization and microbiological protection, reducing the need for high concentrations of单一 emulsifiers and allowing for lower preservative content.
2Object-affected harmful factors
If preservatives are reduced to improve skin compatibility, then skin compatibility is improved, but microbiological stability deteriorates
Solution Approach 1:
The patent makes the emulsifier system multi-functional by selecting polyglyceryl-10-stearate which provides both emulsion stabilization and contributes to microbiological stability. The combination with specific antimicrobial substances (piroctone olamine and/or benzethonium chloride) at reduced concentrations (0.05-5% by weight) achieves effective preservation while minimizing skin irritation and allergic reactions.
Solution Approach 2:
The patent changes the concentration parameters of preservatives to optimized levels (0.05-5% by weight) rather than using conventional higher concentrations. This parameter optimization, combined with the specific emulsifier system, maintains microbiological stability while improving skin compatibility by reducing preservative-related side effects.
3Stability of the object's composition
If conventional emulsifiers are used to maintain stability, then emulsion stability is improved, but the amount of preservatives required increases
Solution Approach 1:
The patent creates a composite system where polyglyceryl-10-stearate works synergistically with reduced amounts of antimicrobial substances (piroctone olamine and/or benzethonium chloride). The emulsifier system itself contributes to the overall stability and microbiological protection, allowing for reduced preservative content while maintaining effective emulsion stability.
Solution Approach 2:
The patent optimizes the concentration parameters of both emulsifier (0.1-2.8% by weight) and preservative (0.05-5% by weight) to achieve effective stability with minimal preservative content. This parameter optimization reduces the total quantity of additives while maintaining product stability and safety.
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
Polyglyceryl-10-stearate enables stable emulsions with reduced preservative amounts, maintaining microbiological stability for extended periods without skin irritation, even when used alone, and allows for a cold-cold process in emulsion production, making it suitable for thermally labile ingredients.
Implementation Method 1
Hydrodispersions represent dispersions of a liquid, semi-solid or solid inner (discontinuous) lipid phase in an outer aqueous (continuous) phase. Hydrodispersions are - like emulsions, which are characterized by a similar phase arrangement - metastable systems
Implementation Method 2
The use of polyglyceryl-10-stearate as an emulsifier in cosmetic or dermatological preparations, with concentrations less than 6% by weight
Implementation Method 3
The choice of agent is crucial - because bacteria, fungi and yeasts do not distinguish whether a cream or lotion contains natural or synthetic substances. All it takes is opening it once and the cosmetic preparation is contaminated with bacteria, fungi and/or yeasts and can multiply.
Data Source
Figure 1
AI summary
The invention relates to cosmetic or dermatological preparations having improved microbiological stabilities based on a percentage of polyglyceryl-10-stearate as an emulsifier and allows the percentage of antimicrobial substances to reduce.