Rubber composition for tire, and tire

• US 8,258,224 B2
• Filed: 05/23/2008
• Issued: 09/04/2012
• Est. Priority Date: 06/08/2007
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: Minagawa, Yasuhisa
• Primary Examiner(s): Godenschwager, Peter F
• Assistant Examiner(s): Scott, Angela C
• Application Number:
  US12/153,770
• Publication Number:
  US 20080306199A1
• Time in Patent Office: 1,565 Days
• Field of Search: 524/394, 524/399
• US Class Current: 524/399
• CPC Class Codes: B60C 1/00 Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• CPC Class Codes: B60C 1/0016 Compositions of the tread
• CPC Class Codes: C08C 19/06 Epoxidation
• CPC Class Codes: C08K 5/098 Metal salts of carboxylic acids
• CPC Class Codes: C08L 15/00 Compositions of rubber derivatives C08L11/00, C08L13/00 take precedence

Abstract

The present invention provides a rubber composition for a tire containing an epoxidized natural rubber, sulfur and a fatty acid metal salt, in which the metal of the fatty acid metal salt is a metal belonging to Group 12, 13 or 14 of the periodic table. Here, the fatty acid metal salt is preferably at least one kind selected from the group consisting of zinc stearate, aluminum stearate and tin stearate. Also, the present invention provides a tire manufactured by using the foregoing rubber composition for a tire.

Claims

1. A rubber composition for a tire comprising:

a rubber component consisting of an epoxidized natural rubber wherein the epoxidized natural rubber is the only rubber component of the rubber composition;

sulfur;

wherein the content of the sulfur is 0.3 to 8 parts by mass with respect to 100 parts by mass of the rubber component; and

a fatty acid metal salt;

wherein said fatty acid metal salt is tin stearate and wherein the content of the fatty acid metal salt is 1 to 10 parts by mass with respect to 100 parts by mass of the rubber component.

2. A tire manufactured by using the rubber composition for a tire according to claim 1.

3. The rubber composition for a tire according to claim 1, wherein the content of the sulfur is 2 to 8 parts by mass with respect to 100 parts by mass of the rubber component;

and the content of the fatty acid metal salt is 2 to 10 parts by mass with respect to 100 parts by mass of the rubber component.

4. The rubber composition for a tire according to claim 1, wherein the content of the sulfur is 2 parts by mass with respect to 100 parts by mass of the rubber component;

and the content of the fatty acid metal salt is 2 parts by mass with respect to 100 parts by mass of the rubber component.