| abstract |
The present invention provides a water-soluble polymer which can easily prepare a polymer, can graft a high molecular weight polymer into starch, reduce the amount of residual monomers, and use various obtained cohesive properties when using the obtained water-soluble polymer as a coagulant. In the presence of a polysaccharide, an azo polymerization initiator and a hydrogen extracting agent, a method for producing a water-soluble polymer for polymerizing a water-soluble radical polymerizable monomer containing a cationic radical polymerizable monomer as an essential component, and a water-soluble polymer obtained by the method Provide a polymer flocculant. |