Nitto Boseki Co., Ltd.

Yusuke Fukushima

Yasuhito Nakata

Minoru Takeuchi

Hiroyuki Takayama

Yusuke Sato

Yusuhito Nakata

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.

Method for producing copolymer of diallylamine and sulfur dioxide

Provided is a process for producing a copolymer of diallyldialkylammonium salt and a maleic acid which copolymer is free of residual monomers and polymerization initiator and hence stably exhibits excellent performances in various uses, and the process comprises polymerizing a monomer mixture comprising diallyldialkylammonium salt and maleic acid in the presence of persulfate as a radical polymerization initiator in water or a polar solvent, and completion of the polymerization-reaction, decomposing the radical polymerization initiator to produce a copolymer comprising diallyldialkylammonium salt constituent unit and a maleic acid constituent unit.

Method for producing diallyldialkylammonium salt/maleic acid copolymer

Provided is a method for producing a diallylamine acetate polymer comprising polymerizing diallylamine acetate in water or a polar solvent in the presence of a radical initiator, the radical initiator being an organic acid addition salt of a specific cyclic amidinoazo compound, and a diallylamine acetate polymer solution free of halogen.

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Fukushima, Japan

Yusuke Fukushima