| abstract |
A novel water-soluble high-molecular compound which can be used as an additive for papermaking or the like in place of the usual known water-soluble high-molecular compound having a cationic group, which exhibits excellent effect in reinforcing a paper and increasing retention ratio of filler in the papermaking containing filler, which is a silicon-containing water-soluble high-molecular compound having an amino group or ammonium group, wherein a silicon-containing compound (S) having an epoxy group is bonded to the high-molecular compound, and which is produced by reacting the silicon-containing compound (S) having an epoxy group with a water-soluble high-molecular compound (A) having a primary, secondary or tertiary amino group. |