Rubber composition and tire

A technology of rubber composition and compound, which is applied in the direction of special tires, tire parts, tire tread/tread pattern, etc., can solve the problems of difficult tire ice performance, poor wear resistance, blending, etc., and achieve improvement Performance on ice, effect of good performance on ice

Active Publication Date: 2018-08-31
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, tires with soft tread rubber generally have the problem that the tires exhibit poor abrasion resistance on dry roads
However, such organic fibers or glass fibers, etc., which do not exhibit interaction with rubber, rather function as an origin of breakage, and tend to deteriorate the fracture resistance (abrasion

Method used

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  • Rubber composition and tire
  • Rubber composition and tire
  • Rubber composition and tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0158] Hereinafter, the present invention will be further described in detail by way of examples. The present invention is not limited to these examples in any way.

[0159]

[0160] Rubber composition samples were prepared according to the blending formulations shown in Tables 1 and 2. According to the method described in paragraph [0009] of the present invention, the sample is observed by using a scanning probe microscope. The formation of a phase-separated structure and a plurality of polymer phases immiscible with each other was confirmed in each rubber composition sample.

[0161]

[0162] A test sample tire (tire size: 195 / 65R15) was prepared by using the rubber composition sample thus obtained in its tread according to a conventional method. The foaming ratio of the tread of each sample tire was calculated according to the above formula (ii). The wear resistance and on-ice performance of each sample tire were then evaluated by the methods described below. The re...

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PUM

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Abstract

As a rubber composition capable of greatly improving on-ice performance while suppressing a decrease in abrasion resistance of a tire, the present invention provides a rubber composition characterizedby the following: containing silica and at least three types of diene-based polymers that form a plurality of mutually incompatible polymer phases; in that a diene-based polymer (B), which is blendedat a quantity of 10 mass% or more relative to the total quantity of the diene-based polymers and which does not have the lowest or the highest glass transition temperature (Tg) among the diene-basedpolymers, is modified by a silicon atom-containing compound, and satisfies the relationship represented by the formula St+Vi/2 <= 33 [in the formula, St is the content (mass%) of bonded styrene in thediene-based polymer (B) and Vi is the quantity (mass%) of vinyl bonds in the conjugated diene compound portion of the diene-based polymer (B)]; and in that the blending quantity of the silica is 25 parts by mass or more relative to a total of 100 parts by mass of the diene-based polymers.

Description

technical field [0001] The present invention relates to rubber compositions and tires. Background technique [0002] Studless tires having relatively soft tread rubber have traditionally been used as tires for safe running on ice as well as on dry roads. It is known that the performance on ice of a tire is improved when the tread rubber of the tire is made relatively soft. However, tires with soft tread rubber generally have the problem that the tires exhibit poor wear resistance on dry roads. In short, the tire's on-ice performance and wear resistance cannot be simultaneously improved in a compatible manner. [0003] Examples of known techniques for improving the on-ice performance of tires include blending organic fibers, glass fibers, etc., with a rubber composition for a tread of a tire, so that the organic fibers, glass fibers, etc. scrape icy road surfaces and Improves tire performance on ice. However, such organic fibers, glass fibers, etc., which do not exhibit i...

Claims

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Application Information

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IPC IPC(8): C08L9/00B60C1/00C08K3/04C08K3/36C08L7/00C08L15/00
CPCB60C1/00C08K3/04C08K3/36C08L7/00C08L9/00C08L15/00C08L2205/02C08L2205/03B60C1/0016B60C2011/145C08L9/06C08K3/08C08K7/02C08L2205/025
Inventor 额贺英幸
Owner BRIDGESTONE CORP
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