Crumb rubber modified asphalt with improved stability
US8211960B2 · kind B2 · utility
1Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2010 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Nov 18, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/51
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a method for producing a crumb rubber modified asphalt comprising the steps of:a) heating a pre-selected quantity of asphalt to a temperature of between about 325° F. to 550° F.;b) adding crumb rubber and a mineral acid to the heated asphalt with stirring; andc) blowing air through the asphalt, crumb rubber and mineral acid mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.