Rubber composition and tire using same

Patent metadata

Field	Value
Publication number	US-2016101650-A1
Application number	US-201414888482-A
Country	US
Kind code	A1
Filing date	May 19, 2014
Priority date	May 17, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

Provided is a rubber composition containing a high layered or sheet clay mineral content, wherein the dispersion of the stratified or tabular clay minerals is improved, thus reducing air permeability and improving flex resistance. Also provided is a tire using said rubber composition. An example of the aforementioned rubber composition is a rubber composition containing a rubber component (A), a layered or sheet clay mineral (B), and a glycerin fatty acid ester composition (C).

First claim

1 - 2 . (canceled)

3 . The rubber composition characterized in that the glycerin fatty acid ester composition (C) contains glycerin fatty acid monoester and glycerin fatty acid diester, and a content of the glycerin fatty acid monoester in the glycerin fatty acid ester composition is 35% by mass or more.

4 . The rubber composition as described in claim 3 , characterized in that the glycerin fatty acid ester composition (C) contains glycerin fatty acid monoester and glycerin fatty acid diester, and a content of the glycerin fatty acid diester in the glycerin fatty acid ester composition is 65% by mass or less.

5 . The rubber composition as described in claim 3 , characterized in that a blend amount of the glycerin fatty acid ester composition (C) is 0.1 to 20 parts by mass based on 100 parts by mass of the stratified or tabular clay mineral (B).

6 . The rubber composition as described in claim 3 , characterized in that a blend amount of the glycerin fatty acid ester composition (C) is 0.25 to 10 parts by mass based on 100 parts by mass of the stratified or tabular clay mineral (B).

7 . The rubber composition as described in claim 3 , characterized in that a blend amount of the glycerin fatty acid ester composition (C) is 0.5 to 20 parts by mass based on 100 parts by mass of the rubber component (A).

8 . The rubber composition as described in claim 3 , characterized in that a blend amount of the stratified or tabular clay mineral (B) is 20 to 200 parts by mass based on 100 parts by mass of the rubber component (A).

9 . The rubber composition as described in claim 3 , characterized in that the stratified or tabular clay mineral (B) is clay, mica, talc or feldspar.

10 . The rubber composition as described in claim 3 , characterized in that the stratified or tabular clay mineral (B) is clay.

11 . The rubber composition as described in claim 3 , characterized in that the rubber component (A) is a diene base rubber or a butyl base rubber, or a mixture of a diene base rubber and a butyl base rubber.

12 . The rubber composition as described in claim 11 , characterized in that the diene base rubber is at least one selected from a natural rubber, an isoprene rubber, a styrene butadiene rubber and a butadiene rubber.

13 . The rubber composition as described in claim 3 , wherein the rubber composition is a rubber composition for an inner liner of a tire.

14 . The rubber composition as described in claim 3 , wherein the rubber composition is obtained by blending 20 parts by mass or more of the stratified or tabular clay mineral (B) based on 100 parts by mass of the rubber component (A) and the glycerin fatty acid ester composition (C), kneading and vulcanizing the blended matter.

15 . A production process for the rubber composition as described in claim 3 , wherein 100 parts by mass of a rubber component (A) is blended with 20 parts by mass or more of a stratified or tabular clay mineral (B) and a glycerin fatty acid ester composition (C), and then the resulting blended matter is kneaded and vulcanized.

16 . A tire characterized by being produced by using the rubber composition as described in claim 3 for an inner liner.

17 . Use of the rubber composition as described in claim 3 for an inner liner of a tire.

18 . A viscosity reduction method for an unvulcanized rubber characterized by being prepared by blending a rubber component (A), a stratified or tabular clay mineral (B) and a glycerin fatty acid ester composition (C).

Assignees

• Bridgestone Corp
• Kao Corp

Inventors

• Yonemoto Makiko
• Takano Tetsuo
• Konishi Motoi
• Oshiro Kojun

Classifications

• C08K5/103

  with polyalcohols · CPC title

• C08K3/04

  Carbon · CPC title

• C08K5/10

  Esters; Ether-esters · CPC title

• C08K2003/2296

  of zinc · CPC title

• C08K5/17

  Amines; Quaternary ammonium compounds · CPC title