Water-soluble graft copolymers of starch-acrylamide and uses therefor
US4400496A · kind A · utility
82Cited by
2References
5Claims
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Key dates
| Filing date | Sep 22, 1980 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Sep 22, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F251/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Graft copolymers having starch as the central chain with grafted side chains of acrylamide or acrylamide-acrylic acid, and a process for preparation of such copolymers in the presence of Ce.sup.+4 or other redox initiators. These copolymers are employed in preparing highly viscous aqueous solutions that are particularly useful in oil recovery from subterranean wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.