Novel water soluble cationic acrylamide polymers having relatively uniform cationic quaternary amine functional unit distribution
US4783513A · kind A · utility
12Cited by
5References
18Claims
0Family size
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Key dates
| Filing date | Apr 10, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Apr 10, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel water-soluble, cationic acrylamide polymers characterized by having a weighted standard deviation of the charge distribution, as calculated from measurements of the disappearance ratio of the comonomers, of less than about 0.6 are prepared by acidifying an acrylamide monomer with a weak acid and polymerizing said monomer with a monomer having quaternary amine groups. The polymers are useful as flocculation aids and for a variety of other water treatment applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.