Use of an ester additive and paving grade asphalt in built up roofing asphalt composition manufacture
US10336906B2 · kind B2 · utility
8Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2015 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Jan 16, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermally stable built-up roofing asphalt (“BURA”) composition comprising a paving grade asphalt is disclosed. The paving grade asphalt has been over-blown to a first softening point and an additive is included in an amount to achieve a second softening point. The additive comprises at least at least one ester. The BURA composition is thermally stable at processing temperatures of at least 450° F.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.