Hydrogel forming composition and hydrogel produced therefrom

Patent metadata

Field	Value
Publication number	US-9243115-B2
Application number	US-201314429196-A
Country	US
Kind code	B2
Filing date	Sep 18, 2013
Priority date	Sep 18, 2012
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

There is provided a hydrogel having a self-supporting property that can be produced only through mixing at room temperature, and there is provided a method by which the hydrogel can be manufactured by using industrially easily available raw materials. A hydrogel-forming composition that is capable of forming a hydrogel having a self-supporting property, the hydrogel-forming composition characterized by including: a water-soluble organic polymer having an organic acid salt structure or an organic acid anion structure; a silicate salt; and a dispersant for the silicate salt, having a weight average molecular weight of 200 to 20,000 and having hydrolysis resistance.

First claim

The invention claimed is:

1. A hydrogel-forming composition that is capable of forming a hydrogel having a self-supporting property, the hydrogel-forming composition comprising:
a water-soluble organic polymer having an organic acid salt structure or an organic acid anion structure;
a silicate salt; and
a dispersant for the silicate salt, having a weight average molecular weight of 200 to 20,000 and having hydrolysis resistance.

2. The hydrogel-forming composition according to claim 1 , wherein
the dispersant is a polycarboxylate salt-based dispersant.

3. The hydrogel-forming composition according to claim 2 , wherein
the dispersant is sodium polyacrylate or ammonium polyacrylate.

4. The hydrogel-forming composition according to claim 1 , wherein
the dispersant is a polyalkylene glycol-based dispersant.

5. The hydrogel-forming composition according to claim 4 , wherein
the dispersant is polyethylene glycol or polypropylene glycol.

6. The hydrogel-forming composition according to claim 1 , wherein
the water-soluble organic polymer is a water-soluble organic polymer having a carboxylate salt structure or a carboxy anion structure.

7. The hydrogel-forming composition according to claim 6 , wherein
the water-soluble organic polymer is a fully neutralized or partially neutralized polyacrylate salt.

8. The hydrogel-forming composition according to claim 7 , wherein
the water-soluble organic polymer is a fully neutralized or partially neutralized polyacrylate salt having a weight average molecular weight of 1,000,000 to 10,000,000.

9. The hydrogel-forming composition according to claim 1 , wherein
the silicate salt is a water-swellable silicate salt particle.

10. The hydrogel-forming composition according to claim 9 , wherein
the silicate salt is a water-swellable silicate salt particle selected from the group consisting of smectite, bentonite, vermiculite, and mica.

11. The hydrogel-forming composition according to claim 1 , further comprising an alcohol.

12. A hydrogel having a self-supporting property, formed of the hydrogel-forming composition as claimed in claim 1 .

13. A method for manufacturing a hydrogel having a self-supporting property, the method comprising:
mixing the water-soluble organic polymer the silicate sale, and the dispersant each specified by claim 1 , and water or a water-containing solvent to cause a resultant mixture to gel.

14. A method for manufacturing a hydrogel having a self-supporting property, the method comprising:
mixing a mixture of the silicate salt according to claim 1 , and the dispersant or an aqueous dispersion of the mixture and the water-soluble organic polymer or an aqueous solution of the water-soluble organic polymer to cause a resultant mixture to gel.

15. A method for manufacturing a hydrogel having a self-supporting property, the method comprising:
mixing a mixture of the water-soluble organic polymer as claimed in claim 1 , and the dispersant or an aqueous solution of the mixture and the silicate salt or an aqueous dispersion of the silicate salt to cause a resultant mixture to gel.

16. A method for manufacturing a hydrogel having a self-supporting property, the method comprising:
mixing a mixture of the water-soluble organic polymer as claimed in claim 1 , and the silicate salt or an aqueous dispersion of the mixture and the dispersant or an aqueous solution of the dispersant to cause a resultant mixture to gel.

Assignees

• Nissan Chemical Ind Ltd
• Riken

Inventors

• Kudo Yoshihiro
• Nakazawa Taichi
• Aida Takuzo
• Ishida Yasuhiro
• Tamesue Shingo
• Ohtani Masataka

Classifications

• C08J2333/02

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• C08K3/32

  Phosphorus-containing compounds · CPC title

• C08K3/346

  Clay · CPC title

• C08J2433/02

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• C08L71/02

  Polyalkylene oxides · CPC title