Spiculisporic Acid Cosmetic Composition Stability
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Solution Overview
Problem
Spiculisporic acid-based cosmetic compositions are prone to recrystallization at low temperatures, making them unstable and incompatible with long-term cosmetic product stability requirements.
Innovation Solution
A cosmetic composition comprising spiculisporic acid, at least one sulfate and/or sulfonate surfactant, and an organic base, with a molar ratio of organic base to spiculisporic acid greater than 1, preferably between 1 and 2.5, which maintains solubility and prevents recrystallization across a wide temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spiculisporic acid is used in cosmetic compositions at room temperature, then it provides surfactant properties and solubility in ethanol, but it recrystallizes at low temperatures making the composition unstable
Solution Approach 1:
The patent changes the chemical parameters by introducing sulfate and/or sulfonate surfactants in specific concentrations (0.1-10% w/w) and using organic bases with specific molar ratios (R>1, preferably 1-2.5) to modify the solubility characteristics of spiculisporic acid, preventing recrystallization at low temperatures while maintaining stability
Solution Approach 2:
The patent creates a composite system by combining spiculisporic acid with sulfate and/or sulfonate surfactants and organic bases, forming a stable association where the components work together to prevent recrystallization. The composite nature of this mixture provides both the surfactant properties of spiculisporic acid and the stability against temperature-induced precipitation
2Force
If the degree of salification is reduced to maintain surfactant properties, then surface activity is improved, but solubility in water decreases leading to recrystallization
Solution Approach 1:
The sulfate and/or sulfonate surfactants act as intermediaries that facilitate the solubility of spiculisporic acid in aqueous environments without requiring high degrees of salification. These intermediary substances enable the system to maintain both surface activity and water solubility by mediating the interaction between the acid and water
Solution Approach 2:
The patent modifies the chemical environment by introducing organic bases that change the pH and ionic conditions, allowing the system to maintain solubility at lower salification degrees while preserving surfactant properties. The specific molar ratio parameter (R>1) controls this balance
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 remains stable and limpid for extended periods, including 15 days at 4°C or up to two months, ensuring the stability of cosmetic products.
Implementation Method 1
spiculisporic acid is insoluble in water and fats but is soluble in ethanol. Spiculisporic acid is also described as being partly soluble in water at a high temperature. At room temperature spiculisporic acid may be solubilized in water by salification.
Implementation Method 2
even in this optimized range, recrystallization of spiculisporic acid was observed, this being all the more significant since the temperature is low. Therefore, this is incompatible with the marketing of cosmetic products which have to be stable over time, without any recrystallization.
Data Source
AI summary
The invention relates to a cosmetic composition comprising, in a physiologically acceptable medium:an aqueous phase;spiculisporic acid;at least one sulfate and/or sulfonate surfactant; andat least one organic base;wherein the ratio R of the number of moles of organic base over the number of moles of spiculisporic acid is strictly greater than 1.