Heat weldable roofing membrane
US6864195B2 · kind B2 · utility
38Cited by
60References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2002 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Feb 22, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/198
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.