Asphalt-polymer compositions, process for making same and uses thereof
US5703148A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1995 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Mar 16, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L95/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An asphalt-polymer composition containing: PA1 a) at least 25 to 97 wt % of an asphalt, PA1 b) at least 1 to 25 wt % of a polymer, and PA1 c) at least 2 to 50 wt % of aromatic compound(s), wherein PA1 the aromatic compound(s) is present in an amount greater than 2 wt %, PA1 the at least one aromatic compound(s) and the polymer are present in amounts such that the ratio of amount present of aromatic compound to amount present of polymer is from 0.5 to 10, and PA1 the composition has a FRAASS point of less than or equal to -13.degree. C. and a storage stability defined by a PA1 ".DELTA. ring-and-ball" and a ".DELTA. penetrability" of less than or equal to 5. Also a process for preparing such asphalt-polymer composition including mixing the asphalt, the polymer and the aromatic compound at a temperature from 190.degree. to 300.degree. C. for a period of time preferably exceeding 30 minutes. The asphalt-polymer composition can be used as a road asphalt, emulsion or surface coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.