Expandable functional TFE copolymer fine powder, the expanded functional products obtained therefrom and reaction of the expanded products
AssigneeW. L. Gore & Associates, Inc.
InventorsPing Xu, Jack J. Hegenbarth, Rachel Radspinner, Paul D. Drumheller, William B. Johnson, Wen K. Liu, Xin Kang Chen
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Abstract
A functional TFE copolymer fine powder is described, wherein the TFE copolymer is a polymer of TFE and at least one functional comonomer, and wherein the TFE copolymer has functional groups that are pendant to the polymer chain. The functional TFE copolymer fine powder resin is paste extrudable and expandable. Methods for making the functional TFE copolymer are also described. The expanded functional TFE copolymer material may be post-reacted after expansion.
Claims8
A functional tetrafluoroethylene (TFE) copolymer fine powder resin comprising:
- (a) an expandable TFE copolymer comprising:
- a first portion comprising a polymer chain of TFE monomers and at least one comonomer having a functional group pendant to the polymer chain:
- and
- a second shell portion comprising a TFE polymer having high crystallinity;
- and
- (b) at least one additional fluoropolymer.
Dependencies are inferred from the claim text.