Functionalized polyamines for clay mitigation
US9950953B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 11, 2012 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | May 11, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides methods and compositions for treating clay-bearing aggregates, particularly those used for construction purposes, whereby inclusion of fines is maximized due to minimization of clay washing which tends to remove such fines, and whereby performance of the aggregate-containing construction material is enhanced. Exemplary methods comprise introducing to clay a water-soluble, functionalized polyamine comprising a water-soluble polyamine formed by reacting an amine compound with an epoxy compound, the polyamine thus reacted being functionalized through the use of certain halide, sulfate, or epoxy compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.