Sulfur-treated asphalt compositions and their preparation
US6001162A · kind A · utility
11Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Jul 17, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L95/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is provided for preparing asphalt composition, e.g., solvent deasphalting (SDA)-produced asphalt composition comprising a mixture containing SDA bottoms with or without vacuum tower bottoms and lube plant extract, which method comprises treating the asphalt composition with 0.05 to 0.5 wt % reactive sulfur under conditions sufficient to improve rheological properties of said composition as measured by increased complex shear modulus relative to a corresponding untreated mixture. The invention further relates to such asphalt composition and paving composition containing same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.