Water-Free Cosmetic Preservative Composition
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Solution Overview
Problem
Existing cosmetic preservatives face challenges such as insufficient effectiveness, toxicity concerns, and compatibility issues with surfactants, leading to the need for improved antimicrobial solutions that are free from aromatic alcohols and water.
Innovation Solution
A composition comprising 15-25 weight % of 1,2-octanediol, 15-25 weight % of benzoic acid, and 50-70 weight % of propylene glycol, which provides antimicrobial activity without aromatic alcohols and water, forming a clear and stable solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aromatic alcohols are used in preservatives for cosmetics, then antimicrobial effectiveness is improved, but toxicity and sensitivity concerns increase
Solution Approach 1:
The patent removes aromatic alcohols from the preservative formulation and replaces them with a combination of carboxylic acids (benzoic acid, sorbic acid, dehydroacetic acid) and their salts, along with polyols and glycols. This extraction of the harmful component while maintaining antimicrobial activity through alternative safe ingredients directly resolves the contradiction between effectiveness and toxicity.
Solution Approach 2:
The invention uses a composite preservative system combining multiple carboxylic acids, their salts, polyols, and glycols in specific proportions. This composite approach achieves effective antimicrobial protection without relying on single harmful ingredients like aromatic alcohols, thereby maintaining safety while ensuring reliability.
2Reliability
If poly(hexamethylene biguanide) salts are used in preservatives, then antimicrobial activity is enhanced, but compatibility with anionic surfactants deteriorates due to precipitate formation
Solution Approach 1:
The patent eliminates cationic surfactants like poly(hexamethylene biguanide) salts from the formulation and replaces them with carboxylic acid-based preservatives. This removal of the incompatible component prevents precipitate formation with anionic surfactants while maintaining antimicrobial effectiveness through the acid system.
3Reliability
If formaldehyde or formaldehyde depot compounds are used in preservatives, then preservation effectiveness is improved, but safety concerns increase
Solution Approach 1:
The invention removes formaldehyde and formaldehyde depot compounds from the preservative system and replaces them with a carboxylic acid-based formulation containing benzoic acid, sorbic acid, and dehydroacetic acid. This extraction eliminates the harmful formaldehyde component while preserving effectiveness through the alternative acid system.
4Stability of the object's composition
If water is included in the preservative formulation, then solubility and stability are improved, but microbiological contamination risk increases
Solution Approach 1:
The patent modifies the formulation to use water-soluble preservative components (carboxylic acids, their salts, polyols, and glycols) that can be dissolved in water-free cosmetic bases. This parameter change allows the preservative to function effectively without water, eliminating the contamination risk while maintaining solubility and stability through the chosen ingredient combinations.
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 composition exhibits enhanced antimicrobial efficacy compared to using benzoic acid or 1,2-octanediol alone, is suitable for water-free systems, and maintains stability and clarity, making it suitable for preserving cosmetic products like wet wipes.
Implementation Method 1
The composition exhibits enhanced antimicrobial efficacy compared to using benzoic acid or 1,2-octanediol alone
Data Source
AI summary
The invention relates to a composition, which comprises: a)—From 15 weight % to 25 weight % of 1,2-octanediol, b)—From 15 weight % to 25 weight % of benzoic acid, c)—From 50 weight % to 70 weight % of propylene glycol, wherein the content of aromatic alcohol is less or equal to 5 weight % relative to the weight of the liquid concentrate; its use of a composition, for the preservation of cosmetics products, household products or technical products.