Production of sulphonic acid group-containing acrylonitrile polymers and monomers therefor
US4631317A · kind A · utility
2Cited by
4References
17Claims
0Family size
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Key dates
| Filing date | Nov 19, 1984 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Nov 19, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Sulphonic acid-and sulphonate group-containing acrylonitrile polymers are advantageously obtained by precipitation copolymerization in aliphatic hydrocarbons using ethylenically unsaturated sulphonic esters free from carboxylic acid and carboxylic acid ester groups as comonomers and saponifying the sulphonic acid ester groups of the copolymer before, during or after shaping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.