Expandable TFE Copolymers, Methods of Making, and Porous, Expanded Articles Thereof
First Claim
1. An expandable tetrafluoroethylene (TFE) copolymer, said copolymer containing 99.0% or less by weight tetrafluoroethylene monomer units and at least 1.0% by weight of at least one other comonomer other than tetrafluoroethylene, wherein said copolymer exhibits adhesion.
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Accused Products
Abstract
A true tetrafluoroethylene (TFE) copolymer of the fine powder type is provided, wherein the copolymer contains polymerized comonomer units of at least one comonomer other than TFE in concentrations of at least or exceeding 1.0 weight percent, and which can exceed 5.0 weight percent, wherein the copolymer is expandable, that is, the copolymer may be expanded to produce strong, useful, expanded TFE copolymeric articles having a microstructure of nodes interconnected by fibrils. Articles made from the expandable copolymer may include tapes, membranes, films, fibers, and are suitable in a variety of end applications, including medical devices.
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Citations
58 Claims
- 1. An expandable tetrafluoroethylene (TFE) copolymer, said copolymer containing 99.0% or less by weight tetrafluoroethylene monomer units and at least 1.0% by weight of at least one other comonomer other than tetrafluoroethylene, wherein said copolymer exhibits adhesion.
- 48. A medical device comprising an expandable tetrafluoroethylene (TFE) copolymer, said copolymer containing 99.0% or less by weight tetrafluoroethylene monomer units and at least 1.0% by weight of at least one other comonomer other than tetrafluoroethylene.
Specification