VDF
Vinylidene fluoride (VDF)is normally colorless,nontoxic,and flammable,and has slight smell of ether.It is one of important monomers of fluoro high polymer materials with common gender of olefin,and capable of polymerizing and copolymerizing.It is used for preparation of monomer or polymer and synthesis of intermediate.
Execution standard: Q/0321DYS 007
Technical Indexs
| Item | Unit | Index | ||
| High-grade Product | ||||
| Appearance | / | Colorless flammable gas,with slight smell of ether. | ||
| Purity,≥ | ％ | 99.99 | ||
| Moisture,≤ | ppm | 100 | ||
| Oxygen-containing Content,≤ | ppm | 30 | ||
| Acidity (based on HC1),≤ | mg/kg | No | ||
Physical and Chemical Property
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| ltem | Unit | Index | ||
| Chemical Name | / | 1,1-Difluoroethylene | ||
| CAS | / | 75-38-7 | ||
| Molecular Formula | / | CH₂CF₂ | ||
| Structural Formula | / | CH₂=CF₂ | ||
| Molecular Weight | g/mol | 64.0 | ||
| Boiling Point(101.3Kpa) | ℃ | -85.7 | ||
| Fusion Point | ℃ | -144 | ||
| Critical Temperature | ℃ | 29.7 | ||
| Critical Pressure | Kpa | 4458.3 | ||
| Liquid Density (23.6℃) | g/ml | 0.617 | ||
| Steam Pressure(20℃) | Kpa | 3594.33 | ||
| Explosion Limit in Air(Vblume) | ％ | 5.5-21.3 | ||
| Tbxicity LC50 | ppm | 128000 | ||
| Danger Label | / | 2.1(Flammable gas) | ||
Application
VDF as important fluorine-containing monomer,can prepare polyvinylidene fluoride resin (PVDF) through single polymerization,and prepare F26 fluororubber through polymerizing with perfluoropropene,or F246 fluororubber by polymerizing with tetrafluoroethylene and perfluoropropene.It can also be used for preparing fluorine solfonic acid compounds as pesticide and special solvent.
Package, Transportation and Storage
1.Vinylidene fluoride (VDF) must be stored in a tank with an interlayer which is charged with chilled saline,keeping the chilled saline supply without breakage.
2.Vinylidene fluoride (VDF) is forbidden charging into steel cylinders. If needing steel cylinders for packaging, it must use special steel cylinders made from low-temperature resistance materials.
3 .Steel cylinders charged with vinylidene fluoride (VDF) should be equipped with safety caps that are tightly screwed in transportation,keeping from fire.Should utilize sunshade device when transported in summer,protecting it from exposure to sun. The steel cylinders must be loaded and unloaded lightly, keeping from vibration and collision.