Dispersant

Patent metadata

Field	Value
Publication number	US-10155209-B2
Application number	US-201414903970-A
Country	US
Kind code	B2
Filing date	Jul 25, 2014
Priority date	Aug 1, 2013
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

The present invention provides a hydrolysate of a lignocellulosic material, and specifically a method of using a hydrolysis treatment liquid obtained by a hydrolysis treatment of a lignocellulosic material before kraft cooking in order to obtain dissolving pulp for uses other than use of a fuel. Specifically, the present invention provides a dispersant containing the hydrolysate obtained by hydrolysis treatment of the lignocellulosic material. The dispersant of the present invention has excellent dispersibility for a substance such as an inorganic substance and an organic substance without limitation of powder, particulate, granular, fiber, and flat plane shapes.

First claim

The invention claimed is:

1. A dispersant, comprising:
a hydrolysate of a lignocellulosic material; and
at least one selected from the group consisting of:
(A) at least one of a sodium a poly(meth)acrylate, sodium gluconate,
and a partially neutralized metal salt of a poly(meth)acrylic acid,

(B) a compound having an acid group and a polyalkylene glycol chain,
and

(C) a compound having a sulfonic acid group, a salt thereof, or both, wherein:

the hydrolysate comprises an oligosaccharide, a polysaccharide, or both, and a lignin;
a contained amount of the oligosaccharide, the polysaccharide, or both, in the hydrolysate is 50% by weight to 80% by weight relative to a solid content of a hydrolysate; and
a contained amount of the lignin in the hydrolysate is 1 to 10% by weight relative to the solid content of the hydrolysate.

2. The dispersant according to claim 1 , wherein the hydrolysate has a weight average molecular weight of 1,000 to 5,000.

3. The dispersant according to claim 1 , comprising at least one selected from the group consisting of:
(A) the at least one of the sodium a poly(meth)acrylate, the sodium gluconate, and the partially neutralized metal salt of a poly(meth)acrylic acid;
(B) at least one of: a copolymer of a (poly)oxyethylene methacrylate and (meth)acrylic acid, a copolymer of a (poly)oxyethylene allyl ether and (meth)acrylic acid, a copolymer of a (poly)oxyethylene allyl ether and maleic anhydride, a copolymer of a (poly)oxyethylene adduct of 3-methyl-3-buten-1-ol and (meth)acrylic acid, a copolymer of a (poly)oxyethylene adduct of 3-methyl-3-buten-1-ol and maleic anhydride, and salts thereof; and
(C) the compound having a sulfonic acid group, a salt thereof, or both.

4. The dispersant according to claim 1 , which is adapted to function as a dispersant for an inorganic substance.

5. The dispersant according to claim 1 , which is adapted to function as a dispersant for an organic substance.

6. The dispersant according to claim 1 , which is adapted to function as a dispersant for a cement.

7. A composition, comprising;
the dispersant according to claim 1 ;
a substance to be dispersed; and
a dispersion medium.

8. The composition according to claim 7 , wherein the substance to be dispersed is a hydraulic material.

9. The composition according to claim 8 , wherein the hydraulic material comprises a cement.

10. A hydraulic composition, comprising:
the dispersant according to claim 1 ; and
a hydraulic material.

11. A cement composition, comprising:
the dispersant according to claim 1 ; and
a cement.

12. A method of producing a dispersion composition, the method comprising:
dispersing a substance to be dispersed and a dispersion medium in the presence of the dispersant according to claim 1 .

13. A dispersion composition, comprising a substance dispersed in a dispersion medium in the presence of the dispersant according to claim 1 .

Assignees

• Jujo Paper Co Ltd

Inventors

• Yokoyama Shigeki
• Hashimoto Tadafumi
• Yamaguchi Takahito
• Kawamura Masanobu
• Hosaka Hideo
• Iimori Takeshi

Classifications

• C04B24/2641

  Polyacrylates; Polymethacrylates · CPC title

• C04B40/0039

  Premixtures of ingredients · CPC title

• B01F17/0021

  Operations & Transport · mapped topic

• B01F17/0028

  Operations & Transport · mapped topic

• C04B24/2647

  containing polyether side chains · CPC title