Composite roofing members having improved dimensional stability and related methods
US5735092A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Sep 23, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2419/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A composite recovery board (10) includes a foam core (11) selected from the group consisting of polyisocyanurate and polyurethane materials and mixtures thereof; a facer (15), applied to one major surface (13) of the foam core and formed from a sheet selected from the group consisting of reinforced polymer material and reinforced cellulosic material, wherein the polymer material and cellulosic material are reinforced with a material selected from the group consisting of glass strands, glass fibers, and mixtures thereof and, gypsum board (14), applied to the opposite major surface (12) of the foam core. A method of reroofing a roof includes applying composite recovery boards of the present invention to a roof deck; and, applying a weather protective layer over the recovery boards. A continuous method of making a composite recovery board includes feeding gypsum board (14) into a laminator assembly (21); depositing a foamable polymer liquid (36) onto the gypsum board; feeding a facer material (15) into the laminator assembly above the foamable polymer liquid; allowing the polymer liquid to rise between the gypsum board and facer material forming polymer foam of a pre-determined thickn…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.