Quaternary polyalkylene imine containing 2-hydroxypropyltrimethyl ammonium salt pendent side chain groups
US4605707A · kind A · utility
4Cited by
2References
8Claims
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Key dates
| Filing date | Feb 25, 1985 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Feb 25, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/0206
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyalkylene imines containing 2-hydroxypropyltrimethylammonium salt side chains are obtained by reaction between alkylene imine polymers and copolymers and a glycidyltrimethylammonium salt. These polymers are very effective flocculants, particularly in the area of water clarification. They are obtained from a variety of sources, e.g. by modification of either commercial polyethylene imines or polymers derived from oxazolines, and oxazinolines, from the polymerization of aziridine monomers or from the condensation of a low molecular weight polyamine and a dihaloalkane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.