Rubber Composition For Tire And Its Producing Method

• US 20090062455A1
• Filed: 08/15/2008
• Published: 03/05/2009
• Est. Priority Date: 08/27/2007
• Status: Abandoned Application

• Current Assignee: TOYO Tire & Rubber Company Limited (Toyo Tire Corporation)
• Original Assignee: TOYO Tire & Rubber Company Limited (Toyo Tire Corporation)
• Inventors: Ihara, Ikuo, Hayashi, Hirofumi, Narita, Hiroaki, Miyasaka, Takashi
• Application Number:
  US12/192,204
• Publication Number:
  US 20090062455A1
• Time in Patent Office: Days
• US Class Current: 524/571
• CPC Class Codes: B60C 1/00 Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• CPC Class Codes: C08J 2321/00 Characterised by the use of unspecified rubbers
• CPC Class Codes: C08J 3/20 Compounding polymers with additives, e.g. colouring
• CPC Class Codes: C08K 5/378 containing heterocyclic rings
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers

Abstract

A rubber composition for tire, which combines low heat build-up properties and breakage property, reduces fuel consumption of a tire, and has excellent good processability is provided. The rubber composition for tire is obtained by blending sulfur and caprolactam disulfide with a diene rubber component to obtain a pre-mixture which does not contain a reinforcing filler and a vulcanization accelerator, and blending and mixing a reinforcing filler and a vulcanization accelerator with the pre-mixture in a post-mixing step.

Claims

1. A rubber composition for tire, obtained by blending sulfur and caprolactam disulfide with a diene rubber component to obtain a pre-mixture which does not contain a reinforcing filler and a vulcanization accelerator, and blending and mixing a reinforcing filler and a vulcanization accelerator with the pre-mixture in a post-mixing step.

2. The rubber composition for tire as claimed in claim 1, wherein the pre-mixture contains 0.1 to 1.0 part by weight of the sulfur and 0.1 to 5.0 parts by weight of the caprolactam disulfide per 100 parts by weight of the diene rubber component.

3. A method for producing a rubber composition for tire, comprising blending sulfur and caprolactam disulfide with a diene rubber component to obtain a pre-mixture which does not contain a reinforcing filler and a vulcanization accelerator, and blending and mixing a reinforcing filler and a vulcanization accelerator with the pre-mixture in a post-mixing step.

4. The method for producing a rubber composition for tire as claimed in claim 3, wherein the pre-mixture contains 0.1 to 1.0 part by weight of the sulfur and 0.1 to 5.0 parts by weight of the caprolactam disulfide per 100 parts by weight of the diene rubber component.