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Rubber composition and pneumatic tire

A rubber composition and rubber technology, which can be used in special tires, tire parts, transportation and packaging, etc., can solve problems such as reduced heat generation, and achieve excellent wet-slip properties.

Inactive Publication Date: 2017-09-08
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, Patent Document 1 shows that the exothermic property is reduced by modification with a nitrone compound ([0006] etc.)

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] Hereinafter, the present invention will be specifically described with reference to examples. However, the present invention is not limited to these Examples.

[0090]

[0091] Methanol (900 mL) heated to 40° C. was placed in a 2 L pear-shaped flask, and p-aldehydobenzoic acid (30.0 g) represented by the following formula (2) was added thereto and dissolved. To this solution was added methanol (100 mL) in which phenylhydroxylamine (21.8 g) represented by the following formula (1) was dissolved, and stirred at room temperature for 19 hours. After completion of the stirring, it was recrystallized from methanol to obtain a nitrone compound (41.7 g) represented by the following formula (3). The yield was 86%.

[0092]

[0093]

[0094] Methanol (900 mL) heated to 40° C. was added to a 2 L pear-shaped flask, and pyridylcarbaldehyde (21.4 g) represented by the following formula (5) was added thereto and dissolved. To this solution was added methanol (100 mL) in whic...

example 2、 comparative example 2～3 and Embodiment 3～7

[0104] The components shown in the following Table 3 (NR / SBR / BR system) were blended in proportions (parts by mass) shown in the following Table 3.

[0105] Specifically, first, among the components shown in Table 3 below, the components other than sulfur and the vulcanization accelerator were mixed in a Banbury mixer at 80° C. for 5 minutes. Next, sulfur and a vulcanization accelerator are mixed in using a roller to obtain a rubber composition.

[0106]

[0107] Each of the prepared rubber compositions (unvulcanized) was vulcanized under pressure at 160° C. for 20 minutes in a predetermined mold to prepare vulcanized rubber test pieces.

[0108]

[0109] For the vulcanized rubber sheet prepared as above, the loss tangent tan δ (60° C. ).

[0110] In addition, in the following Table 2, the measurement result of standard example 1 is shown as index "100", and in the following Table 3, the measurement result of standard example 2 is shown as index "100". The smaller the v...

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Abstract

An object of the present invention is to provide a rubber composition and a pneumatic tire capable of producing a pneumatic tire having excellent wet skid properties while maintaining a good heat-generating property reducing effect. The rubber composition of the present invention contains a diene rubber and a white filler, the diene rubber contains 5 to 40% by mass of modified butadiene rubber, and the modified butadiene rubber is made of unmodified butadiene A modified polymer obtained by modifying a diene rubber (A) with a nitrone compound (B) having a carboxyl group.

Description

technical field [0001] The present invention relates to a rubber composition and a pneumatic tire. Background technique [0002] Conventionally, a modified polymer modified with a compound having a nitrone group (nitrone compound) is known as a polymer contained in a rubber composition used for tires or the like. [0003] For example, Patent Document 1 discloses, "a rubber composition characterized in that 100 to 120 parts by weight of silica are mixed with 100 parts by weight of a diene-based rubber containing 5 to 100% by weight of modified butadiene rubber. parts by weight, the modified butadiene rubber is obtained by modifying butadiene rubber with a cis content of more than 90% with a nitrone compound having a nitrogen-containing heterocycle in the molecule.” ([Claim 1] ). In addition, Patent Document 1 shows that modification with a nitrone compound reduces exothermic properties ([0006], etc.). [0004] Prior art literature: [0005] Japanese Patent Laid-Open No. 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/00B60C1/00C08C19/22C08K3/00C08L15/00
CPCC08L9/06C08K3/36C08L7/00C08L15/00B60C1/0016B60C1/00
Inventor 加藤学高桥亮太冈松隆裕桐野美昭
Owner THE YOKOHAMA RUBBER CO LTD