Method for preparing poly(vinyl alcohol)-co-poly(vinylamine) via a two-phase process
US5300566A · kind A · utility
21Cited by
10References
8Claims
0Family size
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Key dates
| Filing date | Apr 15, 1988 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Apr 15, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Vinyl acetate and an N-vinyl formamide are copolymerized to yield poly(vinyl acetate)-co-poly(N-vinyl formamide) which is base hydrolyzed to poly(vinyl alcohol)-co-poly(N-vinyl formamide). Two phase hydrolysis of particles of poly(vinyl alcohol)-co-poly(N-vinyl formamide) as a slurry in methanol yields particles of poly(vinyl alcohol)-co-poly(vinylamine). provided is a copolymer of the following general formula ##STR1## where m is 0 to 15 mole %. n is 50 to 99 mole %. PA1 x is 0 to 30 mole %. and PA1 y is 1 to 50 mole % .
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.