F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 17/02 (2006.01) B29C 47/00 (2006.01) B29C 69/00 (2006.01)
Patent
CA 2577555
A thermoplastic pipe gasket fabricated of a thermoset material is provided having a first pipe engaging surface and an exterior surface, with the exterior surface having applied thereto a water-based, flexible, slip-coating. The slip-coating comprises polyurethane, a cross-linking agent, and a dispersion of a friction reducing compound. The friction reducing compound can be selected from a fluoropolymer, silicane, or graphite, either alone or in combinations thereof. Depending on the method of fabrication, the slip-coating can be sprayed onto the thermoset material after the thermoset material has been extruded, but before the extrudate's fabrication into a gasket. Alternatively, the slip-coating can be sprayed onto the gasket following its assembly. Still further, the slip-coating can be applied to the thermoset material by dipping the thermoset material into the water-based, flexible, slip-coating.
Biesenberger Jeffrey J.
Kish Kevin S.
Advanced Drainage Systems Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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