Roofing systems and roofing boards with non-halogenated fire retardant
US9528269B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2014 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Jun 9, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249993
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
According to one embodiment, a halogen free roof system is described. The roof system includes a structural deck that is positioned above joists or other support members. Polyisocyanurate foam insulation is positioned atop the structural deck. The polyisocyanurate foam insulation has an isocyanate index greater than 200 and includes a polyisocyanurate core having a halogen free fire retardant. A water proof membrane is positioned atop the polyisocyanurate foam insulation. The polyisocyanurate core is able to form a sufficiently stable char when exposed to flame conditions such that the polyisocyanurate core is able to pass the ASTM E-84 test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.