Preparation of a water-soluble polyvinylbenzyl quaternary ammonium halide
US4087599A · kind A · utility
7Cited by
7References
9Claims
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Key dates
| Filing date | Aug 19, 1976 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | Aug 19, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparation of water-soluble polyvinylbenzyl quaternary ammonium halides by the halomethylation and subsequent quaternization of a polystyrene with the improvement that said polystyrene is a cationically-initiated polystyrene of about 1000 to about 50,000 M.sub.w and M.sub.w /M.sub.n ratio of less than about 8, preferably having less than about 0.1 mole percent residual unsaturation. The quaternized product is useful as a water clarifier and as electroconductive film for copying paper and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.