Modified asphalt and preparation method therefor
US11572445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2018 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Jan 15, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2555/84
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The modified asphalt provided by the disclosure is prepared from the following raw materials in parts by weight: 100 to 120 parts of asphalt, 6 to 20 parts of a modifier, 3 to 9 parts of a compatibilizer, 0.15 to 0.25 parts of sulfur, 0.4 to 0.6 parts of a non-amine anti-stripping agent and 0.2 to 0.4 parts of a coupling agent; and the modifier comprises a styrene-butadiene-styrene block copolymer, a rubber, and a polyurethane. The modified asphalt provided by the disclosure can simultaneously satisfy an elastic recovery at 25° C. of ≥98%, a dynamic viscosity at 60° C. of ≥500,000 Pa·s, a composite shear modulus at 60° C. of ≥10 Pa, and a critical temperature at G*/Sin≥2.2 kPa of ≥94° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.