Reducing crumb rubber modified bitumen odors
US11274208B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2017 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Dec 29, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2555/86
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for reducing odors including the steps of admixing active agents and a diluting agent to liquid crumb rubber modified bitumen, wherein the active agents comprise 20 to 60 wt.-% of an aldehyde selected from alpha-hexyl cinnamaldehyde, 2-(4-tert.-butylbenzyl) propionaldehyde, 2-benzylidenheptanal, or mixtures thereof, and 10 to 40 wt.-% of one or more alcohols having a boiling point of at least 150° C., calculated on the total weight of active agents. A crumb rubber modified bitumen composition as obtained by the method above. The use of a crumb rubber modified bitumen composition as obtained by the method above in road surfacing and road base materials, in insulating layers for buildings, in roofing materials and/or in sealing sheeting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.