Expandable tfe copolymers, method of making, and porous,...

C - Chemistry – Metallurgy – 08 – F

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C08F 214/26 (2006.01) A61L 27/16 (2006.01)

Patent

CA 2754020

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.

L'invention concerne un copolymère de tétrafluoroéthylène (TFE) vrai du type poudre fine, ledit copolymère contenant des unités comonomères polymérisées d'au moins un comonomère autre que le TFE en concentrations au moins égales ou dépassant 1% en poids, et pouvant dépasser 5% en poids, ledit copolymère étant expansible, autrement dit le copolymère peut être expansé pour produire des articles copolymères de TFE expansés utiles et résistants comprenant une microstructure de nuds reliés entre eux par des fibrilles. Les articles fabriqués à partir du copolymère expansible peuvent comprendre des bandes, des membranes, des films, des fibres, et peuvent être appropriés dans une grande variété d'applications, notamment des dispositifs médicaux.

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