| 摘要 |
An acrylic acid-based polymer composition of the present invention is obtained using a hypophosphorous acid compound in an amount of 0.5 to 4.5 parts by mass based on 100 parts by mass of a total of monomers for forming structural units of the acrylic acid-based polymer and adding 1% to 50% by mass of a total amount of the hypophosphorous acid compound to a reactor before supplying the monomer. The phosphorous acid ion is contained in an amount of 20 to 1,000 ppm by mass based on a solid content of the acrylic acid-based polymer. |
