Method for preparing bitumen/polymer compositions and use thereof
US6011095A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1998 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Apr 20, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5317
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Bitumen/polymer compositions are produced by contacting, between 100.degree. C. and 230.degree. C., under agitation, one bitumen or a mixture of bitumens with at least one olefinic polymer bearing epoxy or COOH groupings, then by incorporating in the product, an acid additive while the whole mixture is agitated at a range between 100.degree. C. and 230.degree. C. for at least 10 minutes. The product, which is subjected to treatment by the acid additive may still contain one or several additional polymers, for instance of the elastomer type cross-linkable with sulphur, and even be subjected to sulphur cross-linking before treatment. The bitumen/polymer compositions are useful directly or after dilution, to form binders for carrying out surfacing operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.