Copolymers of N,N-dimethylacrylamide and acrylamide
US4254249A · kind A · utility
21Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1978 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Nov 17, 1998 |
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.