Patent ID: 9193811
Filing Date: 2015-11-24
Classification: A61F,A61L,B29C,B29K,C08F,C08J,Y10T

Abstract:
1. An expandable tetrafluoroethylene (TFE) copolymer comprising: (a) a first, core portion comprising a polymer chain of TFE monomers and at least one other comonomer comprising a perfluoroalkyl vinyl ether monomer; and (b) a second, shell portion consisting of a polymer chain consisting of TFE monomers, wherein said expandable core-shell tetrafluoroethylene copolymer comprises at least 3.0% by weight polymerized units of said at least one other comonomer based on total weight of said copolymer, and wherein said copolymer exhibits adhesion after subjecting the copolymer to a temperature at or below about 290° C.