Oxidized asphalt emulsions
US5981632A · kind A · utility
Inventor
Key dates
| Filing date | Oct 7, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Oct 7, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L1/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Product and method for making an asphaltic emulsion enjoying the weather-resistant and durability advantages of a fully-oxidized asphaltic base. Preferred compositions according to the invention comprise a fully-oxidized asphalt having a softening point of between about 110.degree. F. and about 160.degree. F. and a slurry, the slurry comprising water, a colloidal clay (preferably bentonite clay), barium chloride, and citric acid. Optionally sodium dichromate, fillers such as cellulose fibers, and biocidal agents are added as well. The method for making such asphalts comprises oxidation of a flux asphalt in an air still, preparation of the slurry, and combination of the oxidized asphalt and the slurry in a high speed mixing machine such as a colloidal mill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.