Sulfur-modified bitumen compositions
US12415925B2 · kind B2 · utility
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6References
19Claims
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Key dates
| Filing date | Dec 30, 2021 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Feb 18, 2044 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2555/64
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Preparing a modified bitumen composition includes combining bitumen with elemental sulfur to yield a mixture, and crystallizing the elemental sulfur on a surface of the bitumen to yield a layer of elemental sulfur on the surface of the bitumen. The mixture typically includes about 5 wt % to about 15 wt % of the elemental sulfur. A modified bitumen composition includes A modified bitumen composition includes bitumen and elemental sulfur on a surface of the bitumen. The modified bitumen composition includes about 5 wt % to about 15 wt % of the elemental sulfur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.