JP2002194239A5 - - Google Patents

Claims (13)

A method for producing a water-absorbing agent, comprising mixing an oxetane compound and / or an imidazolidinone compound with a water-absorbent resin which is a crosslinked polymer . The manufacturing method of the water absorbing agent of Claim 1 whose said oxetane compound is an oxetane compound represented by following Structural formula (1).

(In the formula, R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are each independently a hydrogen atom, hydroxyl group, alkyl group, alkenyl group, aromatic group, halogen group, substituted alkyl group, substituted alkenyl group or Represents a substituted aromatic group.) The method for producing a water-absorbing agent according to claim 1, wherein the imidazolidinone compound is an imidazolidinone compound represented by the following structural formula (5).

(In the formula, R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are each independently a hydrogen atom, hydroxyl group, alkyl group, alkenyl group, aromatic group, halogen group, substituted alkyl group, substituted alkenyl group or Represents a substituted aromatic group.) The manufacturing method of the water absorbing agent in any one of Claim 1 to 3 whose said water absorbing resin is a particulate form. The water-absorbent resin is a polymer obtained by polymerizing / crosslinking a monomer mainly composed of acrylic acid and / or a salt thereof (neutralized product). The manufacturing method of the water absorbing agent of description. A water-absorbing agent comprising a water-absorbing resin that is a crosslinked polymer with an oxetane compound and / or an imidazolidinone compound. A water-absorbing agent comprising a water-absorbing resin which is a cross-linked polymer cross-linked by an oxetane compound and / or an imidazolidinone compound. The vicinity of the surface of the water-absorbent resin, which is a crosslinked polymer, is treated with the oxetane compound and / or imidazolidinone compound, and has a water absorption capacity of at least 20 (g / g) under a pressure of 2.07 kPa against 0.9% by weight physiological saline. The water-absorbing agent according to claim 7 , which is g) or more. The water-absorbing agent according to claim 7 or 8 , wherein the fluidity under moisture absorption after standing for 20 minutes under conditions of 40 ° C and 75% relative humidity is 60% or more. The water-absorbing agent according to any one of claims 6 to 9, wherein the water-absorbent resin is in the form of particles. The water-absorbent resin is a polymer obtained by polymerizing and crosslinking a monomer mainly composed of acrylic acid and / or a salt thereof (neutralized product). The water-absorbing agent described. A water absorbent article comprising the water absorbent according to any one of claims 6 to 11 .   A crosslinking agent for a water-absorbent resin comprising an oxetane compound having at least one oxetane skeleton in a molecule.