Heat weldable roofing membrane
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United States of America Patent
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Mar 8, 2005
Grant Date -
Feb 19, 2004
app pub date -
Aug 15, 2002
filing date -
Aug 15, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A roofing membrane includes a substrate sheet formed of a thermoplastic vulcanizate (TPV) and a film layer of thermoplastic polyolefin (TPO) adhered to at least one surface of the substrate sheet. The TPV preferably includes a copolymer of ethylene and a carbonyl containing monomer dynamically vulcanized in a polyolefin thermoplastic, preferably metallocene-catalyzed polyethylene. A scrim reinforcement layer is optionally embedded in the TPV layer. When installed on a roof substrate, the membrane can be sealed by heat welding the seams of the membrane sheets.
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Cited Art Landscape
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