W. L. Gore & Associates, Inc.

Gore Enterprise Holdings, Inc.

Other

Jack J Hegenbarth

Xin Kang Chen

Ping Xu

Huey Shen Wu

William B Johnson

Paul D Drumheller

Rachel Radspinner

Wen K Liu

Jian Guo Chen

Jon P Moseley

James W Chang

Jian Hou

Chen Xin-Kang

Chen Jian-Guo

William G Hardie

Norman A Street

Diane R Carpenter

David E Hazlebeck

Francis A Kennedy

Xin Chen

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.

Expandable functional TFE copolymer fine powder, the expandable functional products obtained therefrom and reaction of the expanded products

Expandable functional TFE copolymer fine powder, expanded products and reacted products therefrom

Expandable functional TFE copolymer fine powder, the expanded functional products obtained therefrom and reaction of the expanded products

High purity perfluoroelastomer composites and processes for producing the same are provided. High purity composites may be formed from compositions comprising a crosslinkable fluoroelastomer terpolymer of TFE, PAVE, and CNVE, and functionalized PTFE, which may be crosslinked to form crosslinked composites having low metal content and low compression set. Emulsion mixtures for forming the high purity composites are also provided.

High purity perfluoroelastomer composites and a process to produce the same

Crosslinkable perfluoroelastomer compositions having low metal content and low compression set when crosslinked, and processes for producing the same, are provided. Compositions comprising terpolymers of TFE, PAVE, and CNVE having a metal content of less than 3000 ppb may be formed into high purity transparent perfluoroelastomer parts.

High purity transparent perfluoroelastomer parts and a process to produce the same

An improved elastomeric material is described comprising an essentially noncross-linkable amorphous copolymer of tetrafluoroethylene (TFE) and perfluoromethyl vinyl ether (PMVE) which is both a thermoplastic and exhibits exceptional mechanical properties. This material is particularly suitable for use in ultra-clean environments, and particularly for use in an implantable device, since it does not contain contaminants that previous thermoset TFE/PMVE copolymers have required. Among the improved properties of the present invention are excellent biocompatibility, high matrix tensile strength, high clarity, high abrasion resistance, high purity, adequate elasticity, and ease of processing due to the thermoplastic, and noncross-linkable structure of the copolymer. The material of the present invention is also a high strength bonding agent particularly suited for bonding porous PTFE to itself or to other porous substances at room or elevated temperatures.

Thermoplastic copolymer of tetrafluoroethylene and perfluoromethyl vinyl ether and medical devices employing the copolymer

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Wilmington, DE, United States of America

Jack J Hegenbarth