Rubber compositions and methods of producing rubber compositions

Patent metadata

Field	Value
Publication number	US-10894880-B2
Application number	US-201916361952-A
Country	US
Kind code	B2
Filing date	Mar 22, 2019
Priority date	Mar 30, 2018
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A rubber composition contains: at least one rubber component selected from the group consisting of an ethylene propylene diene rubber, a chloroprene rubber, a nitrile rubber, and an acrylic rubber; 1.5 to 30 parts by mass of a fluorene-modified cellulose nanofiber per 100 parts by mass of the rubber component; and 30 to 120 parts by mass of a carbon-based filler per 100 parts by mass of the rubber component. A method of producing a rubber composition comprises: kneading a dispersion of a fluorene-modified cellulose nanofiber in a process oil and a rubber component to prepare a kneaded material; and mixing a vulcanizing agent into the kneaded material.

First claim

What is claimed is:

1. A rubber composition comprising:
at least one rubber component selected from the group consisting of an ethylene propylene diene rubber, a chloroprene rubber; a nitrite rubber, and an acrylic rubber;
1.5 to 30 parts by mass of a fluorene-modified cellulose nanofiber per 100 parts by mass of the rubber component; and
30 to 120 parts by mass of a carbon-material filler per 100 parts by mass of the rubber component.

2. The rubber composition according to claim 1 , comprising 30 to 150 parts by mass of a clay per 100 parts by mass of the rubber component.

3. A weather strip comprising the rubber composition according to claim 1 .

4. A hose comprising the rubber composition according to claim 1 .

5. The hose according to claim 4 ,
wherein the rubber component is an ethylene propylene diene rubber; and
the hose comprises 1.5 to 25 parts by mass of the fluorene-modified cellulose nanofiber per 100 parts by mass of the rubber component.

6. The hose according to claim 4 ,
wherein the rubber component is an ethylene propylene diene rubber;
the hose comprises 1.5 to 20 parts by mass of the fluorene-modified cellulose nanofiber per 100 parts by mass of the rubber component; and
the hose is an air cleaner hose.

7. The hose according to claim 4 ,
wherein the rubber component is a chloroprene rubber;
the hose comprises 1.5 to 9 parts by mass of the fluorene-modified cellulose nanofiber per 100 parts by mass of the rubber component; and
the hose is an air cleaner hose.

8. A method of producing a rubber composition, the method comprising:
kneading a dispersion of a fluorene-modified cellulose nanofiber in a process oil and a rubber component to prepare a kneaded material; and
mixing a vulcanizing agent into the kneaded material.

9. The method according to claim 8 , wherein the rubber component comprises at least one of an ethylene propylene rubber, a chloroprene rubber, a nitrile rubber, and an acrylic rubber.

10. The method according to claim 8 , wherein the kneading further comprises kneading a carbon-material filler with the dispersion and the rubber component.

11. The method according to claim 8 , wherein a content of the fluorene-modified cellulose nanofiber in the dispersion is 1.0 to 10% by mass.

12. The method according to claim 10 , wherein the kneading further comprises mixing the carbon-material filler with the dispersion before kneading with the rubber component.

Assignees

• Toyoda Gosei Kk
• Osaka Gas Co Ltd

Inventors

• Arakawa Yuta
• Yamaguchi Yasuhiro
• Kurimoto Hidekazu
• Yamada Masahiro
• Sakamoto Hiroki

Classifications

• C08L13/00

  Compositions of rubbers containing carboxyl groups · CPC title

• D06M2101/06

  cellulosic · CPC title

• C08L15/02

  Rubber derivatives containing halogen · CPC title

• C08L23/16 Primary

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title

• C08L2203/18

  used for pipes · CPC title