| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a water absorptive polymer used for manufacturing ultra absorber.SOLUTION: There is provided a manufacturing method including (i) a process of mixing (α1) a polymerizable ethylenically unsaturated acid group-containing monomer of 0.1 to 99.999 wt.%, (α2) a copolymerizable ethylenically unsaturated monomer of 0 to 70 wt.%, (α3) a crosslinking agent of 0.001 to 10 wt.%, (α4) a water soluble polymer of 0 to 30 wt.%, (α5) water of 0 to 80 wt.% and (α6) an assistant of 0 to 20 wt.%, (ii) a process of free radical polymerization and crosslinking to obtain an aqueous hydrogel polymer, (iii) a process of drying, (iv) a process of conducting pulverization and sieving, (v) a process of surface post crosslinking the hydrogel polymer to which pulverization and sieving have been conducted, (vi) a process of drying and a final treatment of the resulting water absorptive polymer, where an adhesion inhibiting process aid is used alone or as a mixture before conducting the process (iii) and/or during the process (iii).SELECTED DRAWING: None |
