Polytetrafluoroethylene composites

Details Polytetrafluoroethylene composites Polytetrafluoroethylene composites

C - Chemistry, Metallurgy

08

L

C08L 27/18 (2006.01) B29C 59/00 (2006.01) C08J 5/12 (2006.01) C09J 127/20 (2006.01) C09K 13/00 (2006.01)

Patent

CA 2502128

Composites of polytetrafluoroethylene and a structural material (polymer, metal, ceramic, leather, or wood) are bonded with a cured admixture of tetrafluoroethylene- hexafluoropropylene- vinylidene fluoride terpolymer, polyethylene-oxide-modified silicone polymer coupling agent, and oxygen-radical-containing copolymer (epoxy polymer, phenoxy polymer, or hydroxylated diamine-diepoxide derivative copolymer). The bonded surface of the polytetrafluoroethylene portion of the composite is etched (chemical etching, electron-beam etching, laser etching, or plasma etching) prior to application of uncured admixture. The composites are useful in making items such as seals, gaskets, chemically-resistant hoses, o-rings, and pump diaphragms.

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