Roofing product including roofing-grade asphalt mixture and methods of making the roofing product and the roofing-grade asphalt mixture
US9181456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | May 25, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2555/64
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of forming an asphalt mixture can include mixing a bio-asphalt and a bitumen source material different from the bio-asphalt. The bio-asphalt can be formed by mixing a bio-source material with a liquid catalyst. Particles can be added to the asphalt mixture. In an embodiment, the bitumen source material can have a softening point of at least approximately 93° C. and a penetration distance no greater than approximately 25 dmm. In another embodiment, the roofing-grade asphalt mixture can have a softening point of at least approximately 104° C., a penetration distance no greater than approximately 12 dmm, a viscosity of at least approximately 3000 cps at a temperature of 204° C., or any combination thereof. The asphalt mixture can be applied to a base material to form a roofing product. The asphalt mixture can be applied as a pavement product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.