Polar Hydrofluoroether Composition for Broader Solvent Compatibility
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Solution Overview
Problem
Existing hydrofluoroether solvents have limited applicability due to low polarity and potential incompatibility with certain materials, necessitating a solvent composition with enhanced polarity and broader applicability while maintaining the advantages of hydrofluoroether-based solvents, and a simple, high-yield preparation process.
Innovation Solution
A liquid composition comprising hydrofluoroethers of specific formulas (I) and (II) with a finely tuned increased polarity, prepared through a reaction between bifunctional alcohols and fluorinated olefins in a polar aprotic solvent with a basic catalyst, followed by purification methods to remove catalyst residues and impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hydrofluoroethers are mixed with other more polar solvents to increase polarity and broaden applicability, then the range of solubilization is improved, but the composition may become incompatible with certain materials
Solution Approach 1:
The patent modifies the chemical structure of hydrofluoroether by introducing polar functional groups (carboxylic acid, hydroxyl, or amine groups) directly into the molecule. This changes the polarity parameter of the base compound itself, allowing it to achieve broader applicability without mixing with other solvents that would cause compatibility issues. The polar group is covalently bonded to the hydrofluoroether backbone, ensuring stable material compatibility while enhancing solubilization capability.
2Ease of manufacture
If existing methods are used to prepare hydrofluoroethers from bi-functional alcohols, then the production process is simple, but the reaction yield is low due to incomplete conversion and formation of multiple products
Solution Approach 1:
The patent employs a phase transfer catalyst as an intermediary substance to facilitate the reaction between bi-functional alcohol and fluorinated olefin. The catalyst mediates the reaction process, enabling complete conversion of the alcohol groups to ether groups while preventing side reactions. This intermediary catalyst allows the process to remain simple (no complex equipment needed) while achieving high yields through enhanced reaction efficiency and selectivity.
3Object-affected harmful factors
If hydrofluoroethers are used as solvents, then low GWP and low flammability are achieved, but relatively low polarity limits their range of applicability
Solution Approach 1:
The patent creates a composite molecular structure by combining the hydrofluoroether backbone (which provides low GWP and low flammability) with polar functional groups (carboxylic acid, hydroxyl, or amine). This molecular composite maintains the beneficial environmental and safety properties of the original hydrofluoroether while adding the polarity characteristics needed for broader applicability. The resulting compound integrates multiple functional properties within a single molecular entity.
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 achieves a broader range of applicability with maintained solvent advantages and high yields, using environmentally friendly processes and equipment-friendly purification methods.
Implementation Method 1
prepared through a reaction between bifunctional alcohols and fluorinated olefins in a polar aprotic solvent with a basic catalyst
Implementation Method 2
reaction between bifunctional alcohols and fluorinated olefins in a polar aprotic solvent
Data Source
AI summary
A liquid composition comprising one or more compound of formula (I): CFHX—CF2—O—R—O—CF2—CFHX (I), one or more compound of formula (II): CFHX—CF2—O—R—OH (II) wherein: —R in formulas (I) and (II) is independently selected from C2-C10 divalent linear or branched alkyl, optionally including a cycle, an aromatic ring and/or oxygen heteroatoms engaged in ether bonds, X is selected from halogens, H, Rf, wherein Rf is selected from: —a C1-C8 fully or partially fluorinated linear or branched alkyl optionally including a cycle, or—a C1-C3 fully or partially fluorinated alkoxy, the two instances of X in formula (I) being the same or different, preferably being the same, —the amount of the one or more compounds of formula (II) is from 0.002 to 5% by weight of the one or more compounds of formula (I).