Roofing product with increased tear strength comprising a release agent
US9970153B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2009 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | May 1, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2992
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a roofing product comprised of an asphalt coating on a nonwoven fiberglass mat. Enhanced tear strength for the roofing product, generally an asphalt shingle, is obtained by the presence of a release agent. The release agent can be a coating on the fiberglass mat, an additive in the mat binder, or present as an additive in the asphalt itself. Preferably, the release agent is a reactive polysiloxane which can react with any component within the roofing product, including the glass surface, sizing chemicals, binder chemicals, as well as the asphalt coating. The reaction can take place either during or after the polysiloxane is added or applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.