Fire retardant EPDM roofing membrane compositons for use on high-sloped roofs
US6632509B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1998 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | May 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24405
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Fire retardant sheeting materials for roofing having improved burn resistivity and are suitable for use on roofs having inclines of at least 1 inch per linear foot. These sheeting materials are prepared from a polymeric composition of matter comprising a base polymer containing at least one ethylene-propylene-diene terpolymer, the base polymer having up to about 2 percent by weight crystallinity; from about 85 to about 175 parts by weight of at least one non-combustible mineral filler per 100 parts of the base polymer; from about 30 to about 50 parts by weight of a processing material, per 100 parts of the base polymer; from about 50 to about 80 parts by weight of at least one fire retardant additive, per 100 parts of the base polymer; and from about 1.5 to about 10 parts by weight of a sulfur cure package per 100 parts of the base polymer. The composition contains at least 40 percent non-combustible materials, and the sheeting material has a limiting oxygen index (LOI) of at least 40 percent when tested in accordance with ASTM D2863-91. A method of covering a roof comprises the steps of applying layers of the fire retardant roof sheeting material prepared from the polymeric compos…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.