Super absorbent resin for absorbing blood or high viscosity liquid and method for preparing same

Patent metadata

Field	Value
Publication number	US-10449515-B2
Application number	US-201816130509-A
Country	US
Kind code	B2
Filing date	Sep 13, 2018
Priority date	Dec 18, 2014
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

Disclosed herein is a method for preparing a superabsorbent polymer for absorbing blood or highly viscous liquid including a) providing a superabsorbent resin; b) pre-treating the superabsorbent resin of step a) by mixing a water-soluble polyvalent cationic salt in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a); and c) surface treating the pre-treated superabsorbent resin of step b) by mixing a polycarbonic acid-based copolymer in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a).

First claim

The invention claimed is:

1. A method for preparing a superabsorbent polymer for absorbing blood or highly viscous liquid, comprising:
a) providing a superabsorbent resin;
b) pre-treating the superabsorbent resin of step a) by mixing a water-soluble polyvalent cationic salt in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a); and
c) surface treating the pre-treated superabsorbent resin of step b) by mixing a polycarbonic acid-based copolymer in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a).

2. The method of claim 1 , wherein the superabsorbent resin is a superabsorbent polymer product or a superabsorbent base resin.

3. The method of claim 1 , wherein the water-soluble polyvalent cationic salt comprise a cationic ion selected from the group consisting of Al 3+ , Zr 4+ , Sc 3+ , Ti 4+ , V 5+ , Cr 3+ , Mn 2+ , Fe 3+ , Ni 2+ , Cu 2+ , Zn 2+ , Ag + , Pt 4+ , Au + , and a combination thereof, and an anion selected from the group consisting of sulfate (SO 4 2− ), sulfite (SO 3 2− ), nitrate (NO 3− ), metaphosphate (PO 3− ), phosphate (PO 4 3− ), and a combination thereof.

4. The method of claim 3 , wherein the water-soluble polyvalent cationic salt is aluminum sulfate (Al 2 (SO 4 ) 3 ) or zirconium sulfate (Zr(SO 4 ) 2 ).

5. The method of claim 1 , wherein the polycarbonic acid-based copolymer contains an alkoxypolyalkylene glycol mono(meth)acrylic acid ester monomer and a (meth)acrylic acid monomer.

6. The method of claim 5 , wherein the alkoxypolyalkylene glycol mono(meth)acrylic acid ester monomer is represented by the following Chemical Formula 1:

wherein,
R 1 is a hydrogen atom or methyl;
R 2 O represents an oxyalkylene moiety of 2 to 4 carbon atoms;
R 3 is alkyl of 1 to 4 carbon atoms; and
m is an integer of 50 to 200, expressing an average addition mole number of oxyalkylene.

7. The method of claim 5 , wherein the alkoxypolyalkylene glycol mono(meth)acrylic acid ester monomer is at least one selected from the group consisting of methoxypolyethylene glycol mono(meth)acrylate, methoxypolypropylene glycol mono(meth)acrylate, methoxypolybutylene glycol mono(meth)acrylate, methoxypolyethylene glycol polypropylene glycol mono(meth)acrylate, methoxypolyethylene glycol polybutylene glycol mono(meth)acrylate, methoxypolypropylene glycol polybutylene glycol mono(meth)acrylate, methoxypolyethylene glycol polypropylene glycol polybutylene glycol mono(meth)acrylate, ethoxypolyethylene glycol mono(meth)acrylate, ethoxypolypropylene glycol mono(meth)acrylate, ethoxypolybutylene glycol mono(meth)acrylate, ethoxypolyethylene glycol polypropylene glycol mono(meth)acrylate, ethoxypolyethylene glycol polybutylene glycol mono(meth)acrylate, ethoxypolypropylene glycol polybutylene glycol mono(meth)acrylate, and ethoxypolyethylene glycol polypropylene glycol polybutylene glycol mono(meth)acrylate.

8. The method of claim 5 , wherein the (meth)acrylic acid monomer is represented by the following Chemical Formula 2:
R 2 —COOM 1   [Chemical Formula 2]

wherein, R 2 is an unsaturated hydrocarbon of 2 to 5 carbon atoms; and
M 1 is a hydrogen atom, a monovalent or divalent metal, an ammonium group, or an organic amine group.

9. The method of claim 5 , wherein the (meth)acrylic acid monomer is at least one selected from the group consisting of an acrylic acid, a methacrylic acid, a monovalent or divalent metal salt thereof, an ammonium salt thereof, and an organic amine salt thereof.

10. The method of claim 1 , wherein the polycarbonic acid-based copolymer is contained in an amount of 0.001 to 3.0 parts by weight, based on 100 parts by weight of the superabsorbent resin.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Young-Sam
• Hong Yeon-Woo
• Ryu Dong-Jo

Classifications

• C08F220/282

  and containing two or more oxygen atoms · CPC title

• C08F8/44

  Preparation of metal salts or ammonium salts · CPC title

• A61F13/53 Primary

  characterised by the absorbing medium (A61F13/20 takes precedence) · CPC title

• C08F220/06

  Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof · CPC title

• C08J7/04 Primary

  Coating · CPC title