Etching a substrate: processes – Etching to produce porous or perforated article
Reexamination Certificate
2006-11-14
2006-11-14
Hassanzadeh, Parviz (Department: 1763)
Etching a substrate: processes
Etching to produce porous or perforated article
Reexamination Certificate
active
07135122
ABSTRACT:
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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Culbert Roberts
Freudenberg-NOK General Partnership
Harness, Dickey & Pierce P.L.C
Hassanzadeh Parviz
Wangerow Ronald
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