Copolymers of N,N-dimethylacrylamide and acrylamide
US4326970A · kind A · utility
13Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1980 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | May 2, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel copolymers of N,N-dimethylacrylamide and acrylamide are disclosed where the ratio of NNDMA to AM ranges from 10:90 to 95:5. The hydrolyzed copolymer is also disclosed where hydrolysis ranges from 5% to 65% and the ratio of NNDMA to AM is 5:95 to 95:5. These hydrolyzed copolymers are useful in enhanced oil recovery operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.