Aminoalkylated side-chains-containing vinylic copolymers
US5189111A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 4, 1989 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Jan 4, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/923
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Water-dilutable side-chain-containing vinylic copolymers comprising groups (.gamma.) of the formula EQU --X--Alk--Y-- (I), wherein PA0 Alk signifies alkylene with 2-6 carbon atoms or hydroxysubstituted alkylene with 3-6 carbon atoms or alkylene with 4-6 carbon atoms, interrupted by --O--, PA0 X signifies a basic amino group or an ammonium group and PA0 Y signifies a basic --NH-group or an acid adduct thereof, one of X and Y being further bound to an optionally substituted aliphatic or heteroaromatic hydrocarbon radical and the other to hydrogen or an optionally substituted aliphatic hydrocarbon radical, as a constituent of a least some of the side-chains and at least one mole % of the comonomer units constituting the copolymer bearing such (.gamma.)-containing side-chains - which are obtainable by copolymerization of corresponding comonomers or by amino-alkylation of corresponding starting polymers - are particularly suitable as precipitating and/or flocculating agents, e.g. for water and back-water clarification and above all for the production of paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.