Copolymer, cationic high molecular weight flocculating agent comprising the copolymer, and process for producing the copolymer
US6294615A · kind A · utility
5Cited by
4References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 8, 1998 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Dec 8, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F226/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A copolymer which can provide an aqueous solution thereof having high viscosity, a cationic high molecular weight flocculating agent comprising the copolymer and a process for producing the copolymer. The copolymer is formed by a process where copolymer units necessary to form the copolymer are reacted with a polyamine in the presence of ammonium chloride and/or a hydrochloride of an amine. The copolymer has units represented by the following formulae (1) and (2) where substituents are defined in the specification: ##STR1## The copolymer has a Brookfield viscosity as a 1 wt % aqueous solution thereof of 10 to 10,000 centipoise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.