Process of producing roofing shingle coating asphalt
US7857904B2 · kind B2 · utility
29Cited by
37References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2007 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Dec 10, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10C3/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process of producing a roofing shingle coating asphalt from an asphalt feedstock includes the following steps. Wax and blowing catalyst are added to the asphalt feedstock. Then the asphalt feedstock is blown to produce the coating asphalt. The coating asphalt has a softening point within a range of from about 190° F. (88° C.) to about 235° F. (113° C.) and has a penetration of at least about 15 dmm at 77° F. (25° C.).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.