Method for manufacturing super absorbent polymer fiber

Patent metadata

Field	Value
Publication number	US-2017306528-A1
Application number	US-201615518291-A
Country	US
Kind code	A1
Filing date	Sep 2, 2016
Priority date	Sep 4, 2015
Publication date	Oct 26, 2017
Grant date	—

Abstract

This invention relates to a method of manufacturing a superabsorbent polymer fiber and a superabsorbent polymer fiber manufactured thereby.

First claim

1 . A method of manufacturing a superabsorbent polymer fiber, comprising steps of:
1) preparing a neutralization solution by dissolving a water-soluble ethylenic unsaturated monomer in a sodium hydroxide aqueous solution; 2) preparing a spinning solution by adding the neutralization solution with a crosslinking agent and then performing stirring; and 3) producing a superabsorbent polymer fiber by subjecting the spinning solution to centrifugal spinning using a spinneret and then performing drying, wherein the neutralization solution has a neutralization degree of 40 to 90 mol %.

2 . The method of claim 1 , wherein the neutralization solution has a neutralization degree of 50 to 80 mol %.

3 . The method of claim 1 , wherein the water-soluble ethylenic unsaturated monomer is at least one selected from the group consisting of anionic monomers and salts thereof, including isobutylene, acrylic acid, polyacrylic acid, methacrylic acid, maleic anhydride, fumaric acid, crotonic acid, itaconic acid, 2-acryloyl ethanesulfonic acid, 2-methacryloyl ethanesulfonic acid, 2-(meth)acryloyl propanesulfonic acid, and 2-(meth)acrylamide-2-methylpropanesulfonic acid; nonionic hydrophilic monomers, including (meth)acrylamide, N-substituted (meth)acrylate, 2-hydroxyethyl(meth)acrylate, 2-hydroxypropyl(meth)acrylate, methylacrylate, hydroxypropyl methacrylate, methoxypolyethyleneglycol (meth)acrylate, and polyethyleneglycol (meth)acrylate; and amino group-containing unsaturated monomers and quaternary salts thereof, including (N,N)-dimethylaminoethyl (meth)acrylate and (N,N)-dimethylaminopropyl (meth)acrylamide.

4 . The method of claim 1 , wherein the water-soluble ethylenic unsaturated monomer is at least one selected from the group consisting of isobutylene, maleic anhydride, polyacrylic acid, acrylic acid, methylacrylate, hydroxypropyl methacrylate.

5 . The method of claim 1 , wherein the crosslinking agent is at least one selected from the group consisting of a polyhydric alcohol compound, an acrylate-based compound, an epoxy compound, a polyamine compound, a haloepoxy compound, a haloepoxy compound condensed product, an oxazoline compound, a mono-, di- or poly-oxazolidinone compound, a cyclic urea compound, a multivalent metal salt, and an alkylene carbonate compound.

6 . The method of claim 1 , wherein the crosslinking agent is an epoxy compound.

7 . The method of claim 1 , wherein the centrifugal spinning is performed at a rotation speed of 3,000 rpm to 15,000 rpm.

8 . The method of claim 1 , wherein in the preparing the neutralization solution of step 1), the water-soluble ethylenic unsaturated monomer is used in an amount of 10 to 50 wt % based on a total weight of the sodium hydroxide aqueous solution.

9 . The method of claim 1 , wherein in the preparing the spinning solution of step 2), the crosslinking agent is used in an amount of 0.001 to 5 wt % based on a total weight of the water-soluble ethylenic unsaturated monomer.

10 . The method of claim 1 , wherein in step 3), the drying is performed at a temperature of 100 to 250° C. for 10 min to 120 min.

11 . The method of claim 1 , wherein the fiber is a nonwoven fabric.

12 . The method of claim 1 , wherein the superabsorbent polymer fiber is used for manufacturing a hygiene material.

Assignees

• Lg Chemical Ltd

Inventors

• Seo Jin-Seok
• Kim Young Sam

Classifications

• D04H1/4291 Primary

  Olefin series · CPC title

• C08L2203/12

  used for fibers · CPC title

• D04H1/724

  forming webs during fibre formation, e.g. flash-spinning · CPC title

• A61F13/53

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

• D01D5/18 Primary

  by means of rotating spinnerets · CPC title