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Conjugated diene polymer composition and tire

A conjugated diene, polymer technology, used in special tires, tire parts, transportation and packaging, etc., can solve problems such as insufficient reactivity, and achieve excellent balance and height.

Pending Publication Date: 2021-06-11
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the rubber composition described in Patent Document 1 has the following problems: the reactivity between the modified group of the terminal-modified styrene butadiene rubber and silicon oxide is insufficient, and it is difficult to improve both the above-mentioned snow performance and wet road performance. There is room for further improvement in terms of

Method used

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  • Conjugated diene polymer composition and tire
  • Conjugated diene polymer composition and tire
  • Conjugated diene polymer composition and tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～21

[0538] [Examples 1-21], and [Comparative Examples 1-5]

[0539] Conjugated diene polymers (samples 1 to 26) shown in the above Tables 1 to 3 and natural rubber as the raw rubber were prepared according to the formulations shown below to obtain conjugated diene polymers each containing the raw rubber. polymer composition.

Embodiment 1

[0541] Conjugated diene polymer (sample 1): 70 parts by mass (oil removed)

[0542] Natural rubber (glass transition temperature: -70°C): 30 parts by mass

[0543] Silicon oxide (trade name "Ultrasil 7000GR" manufactured by Evonik Degussa Co., Ltd. nitrogen adsorption specific surface area 170m 2 / g): 50.0 parts by mass

[0544] Carbon black (trade name "SEAST KH (N339)" manufactured by Tokai Carbon Co., Ltd.): 5.0 parts by mass

[0545] Silane coupling agent (trade name "Si75" manufactured by Evonik Degussa, bis(triethoxysilylpropyl) disulfide): 6.0 parts by mass

[0546] S-RAE oil (trade name "Process NC140" manufactured by JX Nippon Oil & Energy Co., Ltd.): 37.5 parts by mass

[0547] Zinc white: 2.5 parts by mass

[0548] Stearic acid: 1.0 parts by mass

[0549] Antiaging agent (N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine): 2.0 parts by mass

[0550] Sulfur: 2.2 parts by mass

[0551] Vulcanization accelerator 1 (N-cyclohexyl-2-benzothiazylsulfenamide): 1.7 p...

Embodiment 22

[0555] A conjugated diene polymer composition was obtained in the same manner as in Example 1 except that the raw material rubber was changed to the formulation shown below.

[0556] Conjugated diene polymer (sample 1): 50 parts by mass (oil removed)

[0557] Natural rubber: 50 parts by mass

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Abstract

The invention relates to a conjugated diene polymer composition and a tire. The purpose of the present invention is to provide a conjugated diene polymer composition from which a rubber composition having a highly excellent balance between snowfield performance and slippery road performance can be obtained. A conjugated diene polymer composition contains: 20-99 parts by mass of a rubber component (A) that is a conjugated diene polymer having a glass transition temperature of-35 DEG C or higher; and 1-90 parts by mass of a rubber component (B) having a glass transition temperature of-50 DEG C or less, the rubber component (A) containing a conjugated diene polymer (A1) containing an aromatic vinyl compound and a conjugated diene compound, the conjugated diene polymer (A1) has an absolute molecular weight of 40 * 104 or more and 5000 * 104 or less as determined by a GPC-light scattering measurement method with a viscosity detector, and a branching degree (Bn) of 8 or more as determined by the GPC-light scattering measurement method with a viscosity detector.

Description

technical field [0001] The present invention relates to a conjugated diene polymer composition and a tire. Background technique [0002] In recent years, winter tires have been required to improve running performance on wet roads (wet performance) in addition to running performance on snowy roads (snow performance). [0003] In addition, due to the social demand for reducing the global environmental burden, the demand for extending the life of tires is increasing, and there is a strong need to improve the wear resistance of tire performance. [0004] For a long time, in order to improve the snow performance, in order to reduce the elastic modulus at low temperature and ensure the high followability of the tread rubber to the snow road, it has been proposed to reduce the amount of filler added in the rubber composition or to increase the amount of oil. The amount of addition and other methods. [0005] However, this method has a problem that it tends to lower wet performanc...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08L7/00C08L9/00C08K13/02C08K3/36C08K3/04C08K3/06C08K3/22C08K5/09B60C1/00
CPCC08L9/06C08L7/00B60C1/0016C08L2205/02C08K2003/2296C08K13/02C08K3/36C08K3/04C08K3/06C08K3/22C08K5/09C08L9/00B60C1/00C08L15/00C08C19/25C08L21/00C08F212/14B60C1/0025Y02T10/86
Inventor 关川新一角谷省吾久村谦太京美纪
Owner ASAHI KASEI KK
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