PVDF Polymer Solution Using High-MW Affinity Solvents
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Solution Overview
Problem
Vinylidene fluoride polymers are difficult to dissolve in solvents with low environmental impact and good handling properties, leading to inefficiencies in applications like paints and coatings.
Innovation Solution
A vinylidene fluoride polymer solution is developed using a solvent with a molecular weight of 100 or more, containing ethers, ketones, or esters, and the polymer is formulated to have specific structural and diffraction properties, enabling easy dissolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common solvents like NMP or acetone are used to dissolve vinylidene fluoride polymers, then the polymer dissolves well, but the solvents have high toxicity, low flash point, or difficult handling properties
Solution Approach 1:
The patent changes the molecular weight parameter of the solvent from low (common solvents) to high (100 or more), and changes the chemical structure by introducing ether, ketone, or ester groups. This parameter change enables the solvent to dissolve vinylidene fluoride polymers while having lower toxicity and better handling properties compared to traditional solvents like NMP or acetone
Solution Approach 2:
The patent introduces a specific type of solvent as an intermediary substance that mediates between the polymer and the environment. This solvent acts as a bridge that provides both dissolving capability and environmental safety, resolving the contradiction between solubility and harmful factors
2Object-affected harmful factors
If vinylidene fluoride polymer is dissolved in solvents with lower environmental impact like ethers, ketones, or esters, then the environmental impact is reduced, but the solubility is insufficient and dissolution takes a very long time
Solution Approach 1:
The patent optimizes the molecular weight parameter of the ether, ketone, or ester solvents to be 100 or more, which fundamentally changes the dissolution behavior. This parameter change enables these environmentally friendly solvents to achieve both good solubility and fast dissolution speed, resolving the contradiction between environmental impact and productivity
Solution Approach 2:
The patent makes the solvent class (ethers, ketones, esters) universally applicable for dissolving vinylidene fluoride polymers. By optimizing the molecular weight and structural parameters, these solvents gain multi-functionality: they provide environmental safety, good solubility, and fast dissolution speed simultaneously
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 solution allows for efficient dissolution of vinylidene fluoride polymers in environmentally friendly solvents, improving stability and handling properties.
Implementation Method 1
a vinylidene fluoride polymer solution containing a vinylidene fluoride polymer and a solvent, the solvent including an affinity solvent having a molecular weight of 100 or more and containing at least one structure selected from ethers, ketones, and esters
Data Source
Figure 1
AI summary
An object is to provide a vinylidene fluoride polymer solution in which a vinylidene fluoride polymer is dissolved in a solvent that has a lower environmental impact and is easy to handle. To achieve the above object, the vinylidene fluoride polymer solution contains a vinylidene fluoride polymer and a solvent. The solvent includes an affinity solvent having a molecular weight of 100 or more and containing at least one structure selected from ethers, ketones, and esters, and the vinylidene fluoride polymer satisfies some specific requirements.