Polymer modified bitumen compositions
US6759454B2 · kind B2 · utility
47Cited by
50References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2003 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is a polymer modified bituminous composition having improved phase stability, heat aging and viscosity characteristics. The bituminous compositions are blends comprising bitumen and from about 0.5 to about 25% of a novel anionic block copolymer where one of the blocks is a controlled distribution copolymer of a conjugated diene and a mono-alkenyl arene having a specific arrangement of the monomers in the copolymer block. The composition of the invention is useful for paving, roofing felts, water-proof membrane, adhesive, mopping asphalt, carpet backing and pipe coating applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.