| abstract |
The present invention provides an acrylamide polymer that can enhance paper strength well and reduce the content of (meth) acrylamide, and a paper strength enhancer containing the acrylamide polymer. A (meth) acrylamide, a quaternary ammonium-based monomer, and a (meth) allyl sulfonate, and a nitrogen-containing crosslinkable monomer and a tertiary amino-based monomer are not included. An acrylamide polymer that preferably contains an acrylamide polymer obtained by polymerization of a monomer mixture, a paper strength enhancer containing the polymer, and an anionic polymerizable monomer. [Selection figure] None |