Two-phase process for preparing poly(vinyl alcohol)-co-poly(vinylamine)
US5194492A · kind A · utility
18Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Jan 2, 1992 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Jan 2, 2012 |
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 %, PA1 n is 50 to 99 mole %, x is 0 to 30 mole %, and y is 1 to 50 mole %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.