Waste plastic additive for asphalt
US6844418B2 · kind B2 · utility
1Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2003 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Apr 17, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides an improved polymer additive which may be used to increase the high temperature viscosity of an asphalt, without deleteriously affecting the low-temperature viscosity of the asphalt. The polymer additive may also be used to improve the stiffness of certain asphalts. The polymer additive is produced from readily available polymer blends by a thermal process. The invention additionally provides an improved polymer modified asphalt. In its preferred embodiments, the invention also provides an environmentally acceptable method for recycle of post consumer carpet and bottles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.