Molded body and method for producing cellulose-nanofiber-containing composition

Patent metadata

Field	Value
Publication number	US-9822241-B2
Application number	US-201415025917-A
Country	US
Kind code	B2
Filing date	May 20, 2014
Priority date	Oct 2, 2013
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

Provided herein is a cellulose nanofiber that can be easily combined with a compound having a reactive double-bond group and that can provide a molded article which contains only a small amount of an uncured material that acts as a plasticizer in a molded product, using a simple producing method that does not require any process involving solvent displacement or solvent removal. A high-strength resin composition or molded body prepared by using the cellulose nanofiber is also provided. In refining cellulose in the presence of a compound having a reactive double bond and a hydroxyl value of 200 KOHmg/g or more, the cellulose has a moisture content of 4 to 25 parts by mass with respect to 100 parts by mass of the amount of the cellulose converted on the assumption that the percentage moisture of the cellulose is 0%.

First claim

The invention claimed is:

1. A method for producing a cellulose nanofiber-containing resin composition, comprising:
refining cellulose in the presence of a compound having a reactive double bond and a hydroxyl value of 200 KOHmg/g or more,
wherein the cellulose has a moisture content of 4 to 25 parts by mass with respect to 100 parts by mass of the amount of the cellulose converted on the assumption that the percentage moisture of the cellulose is 0%.

2. The method for producing a cellulose nanofiber-containing resin composition according to claim 1 ,
wherein the compound having a reactive double-bond group and a hydroxyl value of 200 KOHmg/g or more is 40 parts by mass to 250 parts by mass with respect to 100 parts by mass of the amount of the cellulose converted on the assumption that the percentage moisture of the cellulose is 0%.

3. The method for producing a cellulose nanofiber-containing resin composition according to claim 1 , comprising:
refining cellulose, further in the presence of a compound having a reactive double bond and a hydroxyl value of 10 KOHmg/g or less, to thereby produce a cellulose nanofiber-containing composition.

4. The method for producing a cellulose nanofiber-containing resin composition according to claim 3 ,
wherein the amount of the compound having a reactive double-bond group and a hydroxyl value of 200 KOHmg/g or more is 10 parts by mass or more with respect to 100 parts by mass of the amount of the cellulose converted on the assumption that the percentage moisture of the cellulose is 0%, and
the total amount of the compound having a reactive double-bond group and a hydroxyl value of 200 KOHmg/g or more, and the compound having a reactive double bond and a hydroxyl value of 10 KOHmg/g or less is 40 parts by mass to 250 parts by mass with respect to 100 parts by mass of the amount of the cellulose converted on the assumption that the percentage moisture of the cellulose is 0%.

5. The method for producing a cellulose nanofiber-containing resin composition according to claim 1 , further comprising:
diluting the cellulose nanofiber-containing resin composition with a compound having a reactive double-bond group.

6. The method for producing a cellulose nanofiber-containing resin composition according to claim 5 , further comprising:
incorporating a polymerization initiator.

7. A molded body produced by molding the cellulose nanofiber-containing resin composition obtained according to the method of claim 6 .

8. The method for producing a cellulose nanofiber-containing resin composition according to claim 2 , further comprising:
diluting the cellulose nanofiber-containing resin composition with a compound having a reactive double-bond group.

9. The method for producing a cellulose nanofiber-containing resin composition according to claim 3 , further comprising:
diluting the cellulose nanofiber-containing resin composition with a compound having a reactive double-bond group.

10. The method for producing a cellulose nanofiber-containing resin composition according to claim 4 , further comprising:
diluting the cellulose nanofiber-containing resin composition with a compound having a reactive double-bond group.

11. The method for producing a cellulose nanofiber-containing resin composition according to claim 8 , further comprising:
incorporating a polymerization initiator.

12. The method for producing a cellulose nanofiber-containing resin composition according to claim 9 , further comprising:
incorporating a polymerization initiator.

13. The method for producing a cellulose nanofiber-containing resin composition according to claim 10 , further comprising:
incorporating a polymerization initiator.

14. A molded body produced by molding the cellulose nanofiber-containing resin composition obtained according to the method of claim 11 .

15. A molded body produced by molding the cellulose nanofiber-containing resin composition obtained according to the method of claim 12 .

16. A molded body produced by molding the cellulose nanofiber-containing resin composition obtained according to the method of claim 13 .

Assignees

• Dainippon Ink & Chemicals
• Jujo Paper Co Ltd

Inventors

• Ikuma Takahito
• Harada Tetsuya
• Kanzaki Mitsuyuki

Classifications

• C08K7/02 Primary

  Fibres or whiskers · CPC title

• C08L2205/16

  Fibres; Fibrils · CPC title

• C08L1/02

  Cellulose; Modified cellulose · CPC title

• C08F220/343

  in the form of urethane links · CPC title

• C08F251/02 Primary

  on to cellulose or derivatives thereof · CPC title