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US 2013/0172523 A1Published application
Method for producing copolymer of diallylamine and sulfur dioxide
AssigneeNitto Boseki Co., Ltd.
InventorsYusuke Sato, Yusuke Fukushima, Yasuhito Nakata
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Abstract
Provided is a process for producing a copolymer of a diallylamine and sulfur dioxide which copolymer has a higher molecular weight and water-solubility than that obtained by a conventional production process by copolymerizing the diallylamine and sulfur dioxide in the presence of an acid and a radical polymerization initiator in a polar solvent.
Claims5
A process for producing a copolymer of a diallylamine and sulfur dioxide, which comprises copolymerizing a diallylamine of the following general formula (I),
- wherein each of R1 and R2 is independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, Xa− represents a counter ion, and a represents a valence of the counter ion,
- and sulfur dioxide in the presence of an acid and a radical polymerization initiator in a polar solvent.
Dependencies are inferred from the claim text.