A method of manufacturing the same and polyacrylic acid (salt)-based water-absorbent resin, as well as water-absorbing resin for polymerization of acrylic acid

摘要

High (caustic absorption high less of coloring to improve the relationship is conflicting basic physical properties of the water-absorbing resin and "absorption capacity" and "water soluble polymer", control of the polymerization reaction is easy, odor and, without to produce high productivity water-absorbing resin absorption capacity is a high PPUP). In the method for producing a water-absorbent resin obtained by polymerizing an acrylic acid composition comprising acrylic acid and / or its salt, forming a hydrogel crosslinked polymer by radical polymerization of the acrylic acid composition (a) and, and a step (b) heating drying the water-containing gel-like crosslinked polymer, solubility parameters of the acrylic acid composition, (1.0~2.5) × ¹⁰ 4 (Jm ^{-3) 1 /} method for producing a water-absorbent resin comprising from 1 to 1000 ppm by weight of inert organic polymer compound is ^2.