Vinyl alcohol copolymers containing allylamine functionality
US5155167A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1989 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Oct 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A modified poly(vinyl alcohol) copolymer is provided containing copolymerized units of allylamine and/or diallylamine by copolymerizing a vinyl ester, such as vinyl acetate, and an N-allylamide and/or N,N-diallylamide, such as N-allylformamide and/or N,N-diallylformamide and hydrolyzing first the ester groups to hydroxy groups and then the amide groups to amine groups. The second hydrolysis is carried out on solvent-swollen particulate polymer slurried in an acidic or basic medium. The modified polymer can contain small amounts of unhydrolyzed ester and amide groups in addition to the hydroxy and amine functionality which characterizes the copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.