Microfibrous cellulose-containing substance

Patent metadata

Field	Value
Publication number	US-9932461-B2
Application number	US-201314418853-A
Country	US
Kind code	B2
Filing date	Aug 6, 2013
Priority date	Aug 10, 2012
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A microfibrous cellulose aggregate including microfibrous cellulose having an average fiber width of 2 nm to 50 nm and a liquid compound including at least one of water or an organic solvent. The content of the microfibrous cellulose is from 6 mass % to 80 mass % per the mass of the entire microfibrous cellulose aggregate, and the content of the liquid compound is at least 15 mass % per the mass of the entire microfibrous cellulose aggregate.

First claim

What is claimed is:

1. A microfibrous cellulose-containing substance, comprising:
microfibrous cellulose having fibers with an average fiber width of 2 nm to 50 nm;
a first liquid compound comprising at least one of water or an organic solvent; and
a flocculant selected from the group consisting of aluminum sulfate, aluminum polychloride, calcium chloride, magnesium chloride, potassium chloride, calcium sulfate, magnesium sulfate, potassium sulfate, lithium phosphate, potassium phosphate, trisodium phosphate, and disodium hydrogen phosphate;
wherein a content of the microfibrous cellulose is from 6 mass % to 80 mass % per a mass of an entire microfibrous cellulose-containing substance;
a content of the first liquid compound is at least 15 mass % per the mass of the entire microfibrous cellulose-containing substance;
said microfibrous cellulose is flocculated such that said fibers of said microfibrous cellulose are aggregated; and
said microfibrous cellulose-containing substance is in a gel like gel state.

2. The microfibrous cellulose-containing substance according to claim 1 , further comprising at least one selected from the group consisting of acids, cationic surfactants, and cationic polymer flocculants.

3. The microfibrous cellulose-containing substance according to claim 1 , further comprising at least one selected from the group consisting of alkalis, anionic surfactants, and anionic polymer flocculants.

4. The microfibrous cellulose-containing substance according to claim 1 , further comprising a cellulose plasticizer.

5. The microfibrous cellulose-containing substance according to claim 1 , wherein at least 40 mass % of a solid content contained in the microfibrous cellulose-containing substance is the microfibrous cellulose.

6. The microfibrous cellulose-containing substance according to claim 1 , wherein a maximum fiber width of the microfibrous cellulose is at most 50 nm.

7. The microfibrous cellulose-containing substance according to claim 1 , wherein the microfibrous cellulose-containing substance does not contain an organic alkali compound.

8. The microfibrous cellulose-containing substance according to claim 7 , wherein the microfibrous cellulose-containing substance is in a state in which a second microfibrous cellulose dispersion liquid is capable of being remanufactured by adding a second liquid compound to said microfibrous cellulose-containing substance such that said fibers of said microfibrous cellulose are redispersed and performing dispersion treatment.

9. The microfibrous cellulose-containing substance according to claim 1 , wherein said microfibrous cellulose has a cationic group.

10. The microfibrous cellulose-containing substance according to claim 9 , further comprising at least one selected from the group consisting of alkalis, anionic surfactants, and anionic polymer flocculants.

11. The microfibrous cellulose-containing substance according to claim 1 , wherein a content of the flocculant is 0.5 parts by mass to 300 parts by mass with respect to 100 parts by mass of the microfibrous cellulose.

12. A concentrate obtained by concentrating a microfibrous cellulose-containing substance, wherein the microfibrous cellulose-containing substance prior to the concentrating comprises:
microfibrous cellulose having fibers with an average fiber width of 2 nm to 50 nm;
a first liquid compound comprising at least one of water or an organic solvent; and
a flocculant selected from the group consisting of aluminum sulfate, aluminum polychloride, calcium chloride, magnesium chloride, potassium chloride, calcium sulfate, magnesium sulfate, potassium sulfate, lithium phosphate, potassium phosphate, trisodium phosphate, and disodium hydrogen phosphate;
and wherein:
a content of the microfibrous cellulose is from 6 mass % to 80 mass % per a mass of an entire microfibrous cellulose-containing substance prior to the concentrating;
a content of the first liquid compound is at least 15 mass % per the mass of the entire microfibrous cellulose-containing substance prior to the concentrating;
said microfibrous cellulose is flocculated prior to the concentrating such that said fibers of said microfibrous cellulose are aggregated; and
said microfibrous cellulose-containing substance is in a gel state prior to the concentrating.

13. The concentrate of claim 12 , wherein the concentrate does not contain an organic alkali compound.

14. The concentrate of claim 13 , wherein the concentrate is in a state in which a second microfibrous cellulose dispersion liquid is capable of being remanufactured by adding a second liquid compound to said concentrate such that said fibers of said microfibrous cellulose are redispersed and performing dispersion treatment.

15. The concentrate according to claim 12 , wherein a content of the flocculant is 0.5 parts by mass to 300 parts by mass with respect to 100 parts by mass of the microfibrous cellulose.

Assignees

• Oji Holdings Corp

Inventors

• Banzashi Go
• Nagatani Hiroyuki
• IWAI Shino

Classifications

• C08J2301/02

  Cellulose; Modified cellulose · CPC title

• D21H11/18 Primary

  Highly hydrated, swollen or fibrillatable fibres · CPC title

• D21H11/20

  Chemically or biochemically modified fibres · CPC title

• C08L1/02 Primary

  Cellulose; Modified cellulose · CPC title

• C08J3/02

  Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques · CPC title