US 2011/0301560 A1 · ABSORBENT RESIN PARTICLE, PROCESS FOR PRODUCING THE SAME, ABSORBER CONTAINING THE SAME, AND ABSORBENT ARTICLE

Abstract

There is provided an absorbent resin particle having an absorption rate pattern where the rate is slow in the initial stage, moderate in the middle stage, and fast in the late stage, and there is also provided an absorbent article free from problems such as skin irritation by using the absorbent resin particle. The present invention relates to an absorbent resin particle comprising a crosslinked polymer (A1) including, as an essential constituent unit, a water-soluble vinyl monomer (a1) and/or a hydrolyzable vinyl monomer (a2), and a crosslinking agent (b), wherein, in a measurement method of swelled volume per 1 g of the absorbent resin particle against physiological saline, a ratio (t2/t1) of the time (t2) until swelled volume reaches 40 ml to the time (t1) until the swelled volume reaches 5 ml is 5 to 20.

Claims15

Dependent claims

An absorbent resin particle comprising a crosslinked polymer (A1) including, as an essential constituent unit, a water-soluble vinyl monomer (a1) and/or a hydrolyzable vinyl monomer (a2) and a crosslinking agent (b),

wherein, in a measurement method of swelled volume per 1 g of the absorbent resin particle against physiological saline, a ratio (t2/t1) of the time (t2) until swelled volume reaches 40 ml to the time (t1) until the swelled volume reaches 5 ml is 5 to 20.

Dependencies are inferred from the claim text.

Facts

Application

13/142,098Filed 24 Dec 2009

Priority

JP 2008-33320726 Dec 2008

Published

8 Dec 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

C08J 3/12
Processes of treating or compounding macromolecular substances: powdering or granulating
A61L 15/60
Use of materials characterised by their function or physical properties: liquid-swellable gel-forming materials, e.g. super-absorbents
C08J 3/245
Crosslinking, e.g. vulcanising, of macromolecules: differential crosslinking of one polymer with one crosslinking type, e.g. surface crosslinking
C08L 33/02
Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon…:…

Absorbent resin particle, process for producing the same, absorber containing the same, and absorbent article

Life of this patent

Absorbent resin particle, process for producing the same, absorber containing the same, and absorbent article

Life of this patent

Abstract

Claims15