Liquid Fragrance Composition Preventing Crystallization
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Solution Overview
Problem
Cyclohexylidene phenyl acetonitrile (PEONILE™) tends to crystallize at low temperatures, leading to rapid solidification and processing challenges in perfumery, as it is not easily blended with other ingredients due to thermodynamic incompatibility and undesirable olfactive changes.
Innovation Solution
A liquid fragrance composition comprising cyclohexylidene phenyl acetonitrile combined with specific ingredients such as cyclohexyl salicylate, MEFROSOL™, HEDIONE™, diethyl phthalate, and others, which form thermodynamically compatible eutectic mixtures that remain liquid across a broad temperature range and maintain olfactive acceptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If cyclohexylidene phenyl acetonitrile is stored at low temperatures, then its stability is improved, but it crystallizes and solidifies
Solution Approach 1:
The patent applies parameter changes by modifying the physical state parameters through formulation. Specifically, it creates a liquid composition containing cyclohexylidene phenyl acetonitrile combined with other fragrance ingredients at controlled concentrations (e.g., 0.1-10% w/w), which prevents crystallization while maintaining stability. This transforms the pure compound's temperature-sensitive solid-liquid equilibrium into a stable liquid mixture across a broader temperature range.
Solution Approach 2:
The patent employs composite materials by formulating a multi-component liquid composition. The cyclohexylidene phenyl acetonitrile is combined with other fragrance ingredients (such as salicylates, alcohols, or esters) to create a composite liquid system. This composite formulation prevents phase separation and crystallization that would occur with the pure compound, while maintaining the desired olfactive properties and stability.
2Ease of operation
If cyclohexylidene phenyl acetonitrile is heated to prevent crystallization, then it remains liquid and blendable, but burnt off-notes develop
Solution Approach 1:
The patent applies preliminary action by pre-formulating the cyclohexylidene phenyl acetonitrile with other compatible fragrance ingredients before use. This pre-mixed liquid composition ensures the compound remains in liquid form and blendable without requiring subsequent heating steps. The formulation is designed to prevent crystallization through compositional design rather than thermal management, thereby avoiding burnt off-notes.
3Temperature
If other fragrance ingredients are mixed with cyclohexylidene phenyl acetonitrile to depress melting point, then liquid state is maintained, but thermodynamic incompatibility causes phase separation
Solution Approach 1:
The patent applies local quality by carefully selecting specific fragrance ingredients with appropriate molecular characteristics that are locally compatible with cyclohexylidene phenyl acetonitrile. The formulation uses ingredients from specific chemical families (salicylates, alcohols, esters) at controlled concentration ranges, creating localized molecular environments that prevent phase separation while maintaining liquid state across the required temperature range.
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 prevents crystallization and maintains stability from -20°C to 50°C, allowing for efficient handling and blending of cyclohexylidene phenyl acetonitrile, reducing processing time and costs while preserving its desired fragrance characteristics.
Implementation Method 1
The melting point of a specific target substance can be depressed by mixing it with a second substance, which second substance has i) a lower melting point, or ii) forms a eutectic mixture with the target substance.
Implementation Method 2
crystallisation can occur at temperatures below about 28 degrees centigrade, particularly when the liquid comes into contact with irregular packaging surfaces or solid impurities
Data Source
AI summary
A liquid fragrance composition consisting essentially of:cyclohexylidene phenyl acetonitrile; andone or more ingredients selected from the group consisting of cyclohexyl salicylate, MEFROSOL™ (3-methyl-5-phenyl-pentan-1-ol), HEDIONE™ (methyl 2-(3-oxo-2-pentylcyclopentyl)acetate), diethyl phthalate, isopropyl myristate, amyl salicylate, iso-amyl salicylate, benzyl salicylate, iso-bornyl salicylate, cis-3 hexenyl salicylate, ethyl salicylate, iso-butyl salicylate, methyl salicylate and phenylethyl salicylate; and optionallyone or more of 3-methyl-5-phenylpentan-1-ol (MEFROSOL™); an alcohol comprising more than 3 carbon atoms selected from the group consisting of benzyl alcohol, 1-hexanol, 1-heptanol, 1-octanol, cyclohexanol, cyclohexyl propanol, methyl phenyl carbinol, phenyl ethyl alcohol and dimethyl benzyl carbinol; or a glycol ether.