Method of making polymers containing hydroxamate functional groups
US5847056A · kind A · utility
3Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Jul 1, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is disclosed for the formation of highly anionic hydroxamic acid polymers whereby (meth) acrylic acid polymers are esterified in aqueous solution to poly (meth) acrylates. The resultant polymers are then reacted with an hydroxylamine to produce hydroxamated (meth) acrylic acid containing polymers. The esterified polymers, their hydroxamated derivatives and their use to flocculate Bayer Process streams are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.