Urea as an additive to improve the viscosity and activity of acrylamide-acrylamide acrylic acid polymers prepared from poor quality acrylamide
US4042772A · kind A · utility
4Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Nov 8, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F20/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Poor quality acrylamide can be used to produce good quality water-soluble polymers by conducting the polymerization in the presence of urea.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.