Composition and method for water clarification
US5846436A · kind A · utility
5Cited by
17References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Feb 20, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D7/71
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Tannin containing polymers, their method of production and methods of using as water treatment agents are disclosed. The polymers are aldehyde-free and comprise copolymers of tannin and a cationic monomer. Another embodiment comprises aldehyde-free polymers of tannin, cationic monomer and at least one monomer selected from the group consisting of an anionic monomer and a nonionic monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.