Process for producing vinylamine-vinyl alcohol copolymer and use of the copolymer
US6559227B1 · kind B1 · utility
1Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Jul 28, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a process for producing a powdered water-soluble polymer comprising hydrolyzing a copolymer comprising an N-vinylamide unit and a vinyl acetate unit while dispersed in water under a basic condition and then washing the resulting powdered water-soluble polymer with at least one washing liquid selected from an alcohol, water at 20° C. or lower, and salt water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.