초록

There is also provided a method for producing a highly water-absorptive polymer having enhanced gel strength, which comprises treating with an alkoxytitanium a highly water-absorptive polymer having a crosslinked structure, comprising as its constituent a carboxyl group and/or a carboxylate group.

대표청구항 ▼

[ What is claimed is:] [1.] A highly water-absorptive polymer composition comprising a mixture of the following components (A) and (B):(A) 100 parts by weight of a highly water-absorptive polymer having a crosslinked structure, comprising as its constituent a carboxyl group and/or a carboxylate grou

[ What is claimed is:] [1.] A highly water-absorptive polymer composition comprising a mixture of the following components (A) and (B):(A) 100 parts by weight of a highly water-absorptive polymer having a crosslinked structure, comprising as its constituent a carboxyl group and/or a carboxylate group; and(B) 0.05 to 10 parts by weight of an additive selected from the group consisting of oxalic acid and salts, amides, esters, nitrites, and hydrazides of oxalic acid; a sulfate of a metal selected from the group consisting of titanium, zirconium and vanadium; and a crystalline or noncrystalline, high-purity particulate titania having a mean particle diameter of 1 .mu.m or less, a specific surface area of 10 m.sup.2 /g or more as determined by the Brunauer-Emmett-Teller method, and, when crystalline, a crystal structure of a mixed typed of rutile and anatase,said mixture being prepared by mechanically dry blending the components (A) and (B). [2.] The highly water-absorptive polymer composition according to claim 1, wherein the additive is oxalic acid or a oxalic acid salt selected from the group consisting of potassium oxalate, sodium oxalate, potassium oxalate titanate, sodium oxalate titanate and ammonium oxalate titanate.