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US 5,688,879 AGranted
Method of making fluoropolymers
AssigneeThe University of North Carolina at Chapel Hill
InventorJoseph M. DeSimone
Life of this patent
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Abstract
A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce a the fluoropolymer. A preferred solvent for carrying out the process is supercritical carbon dioxide; preferred fluoromonomers for carrying out the process are fluoroacrylate monomers such as 1,1-dihydroperfluorooctyl acrylate. The polymerization step is preferably carried out in the presence of an initiator such as azobisisobutyronitrile.
Claims6
A method of isolating a polymer, said method comprising:
- providing a solution comprising a polymer and carbon dioxide;
- and
- separating said carbon dioxide from said polymer to isolate said polymer from said carbon dioxide.
Dependencies are inferred from the claim text.