Vinylidene fluoride → Hfp tfe

HRID 1160489

Reaktionsgleichung

Reaktionsgleichung von HRID 1160489
S(OOS([O-])(=O)=O)([O-])(=O)=O.[NH4+].[NH4+].[OH-].[Na+].C(S([O-])(=O)=O)CCCCCCC.[Na+].C(F)(F)=C.[F:32][C:33]([F:40])([F:39])[C:34]([F:38])=[C:35]([F:37])[F:36].[F:41][C:42]([F:46])=[C:43]([F:45])[F:44]>O>[F:32][C:33]([F:40])([F:39])[C:34]([F:38])=[C:35]([F:37])[F:36].[F:41][C:42]([F:46])=[C:43]([F:45])[F:44]

Komponenten

8

Edukt 6

HCID 6369Vinylidene fluorideHCID 8301TetrafluoroethyleneHCID 8302HexafluoropropyleneHCID 14798Sodium HydroxideHCID 62648Ammonium PersulfateHCID 23669624Sodium caprylyl sulfonate

Produkt 1

HCID 18927062Hfp tfe

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

A VF2/HFP/TFE copolymer fluoroelastomer was prepared by a continuous emulsion polymerization process, carried out at 115° C. in a well-stirred 2.0-liter stainless steel liquid full reaction vessel. An aqueous solution, consisting of 2.09 g/hour (g/h) ammonium persulfate initiator, 0.84 g/h sodium hydroxide, 1.80 g/h sodium octyl sulfonate, and 1.01 g/h isopropanol chain transfer agent in deionized water, was fed to the reactor at a rate of 5.0 L/hour. The reactor was maintained at a liquid-full level at a pressure of 6.2 MPa by means of a backpressure control valve in the effluent line. After 30 minutes, polymerization was initiated by introduction of a gaseous monomer mixture consisting of 730 g/h vinylidene fluoride (VF2), 384 g/h hexafluoropropylene (HFP), and 130 g/h tetrafluoroethylene (TFE) fed through a diaphragm compressor. After 2.0 hours, collection of effluent dispersion was begun and collection continued for 6 hours. The effluent polymer latex, which had a pH of 4.52 and contained 20.12 wt. % solids, was separated from residual monomers in a degassing vessel at atmospheric pressure.

Aufarbeitung

  1. customcarried out at 115° C. in a well-stirred 2.0-liter stainless steel liquid full reaction vessel
  2. temperatureThe reactor was maintained at a liquid-full level at a pressure of 6.2 MPa by means of a backpressure control valve in the effluent line
  3. custompolymerization
  4. waitAfter 2.0 hours
  5. customcollection of effluent dispersion
  6. customcollection
  7. waitcontinued for 6 hours
  8. customwas separated from residual monomers in a degassing vessel at atmospheric pressure

Quellen und Nachweise

ORD-Eintrag
ord-9762eccf3eb148cfa0464d0d0cdab6d8
Quelldatensatz
uspto-grants-2010_10
Patentnummer
US07816468B2

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