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Conjugated diene polymer composition and tire

A conjugated diene and polymer technology, used in special tires, tire parts, rolling resistance optimization, etc., can solve problems such as increased hysteresis loss, poor wear resistance, and poor tire rolling resistance.

Active Publication Date: 2021-09-10
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, since the thermoplastic resin has low affinity with the silica-based inorganic filler, the modified conjugated rubber composition containing the thermoplastic resin described in Patent Document 4 has the following problem: the silica-based inorganic filler The dispersibility of the silicon oxide-based inorganic filler decreases and the hysteresis loss increases, which leads to the deterioration of the rolling resistance of the tire, and the deterioration of the wear resistance due to the reduction of the interface strengthening effect of the silica-based inorganic filler

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 1～19

[0678] [Examples 1-19], and [Comparative Examples 1-5]

[0679] A conjugated diene polymer composition containing each raw material rubber was obtained according to the formulation shown below.

[0680] Raw material rubber: 100 parts by mass (conjugated diene polymers (samples 1 to 24) shown in Tables 1 to 3 above) 50 parts by mass and modified conjugated diene polymers (trade name " SLR3402", glass transition temperature: -60°C) 50 parts by mass)

[0681] 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

[0682] Carbon black (trade name "SEAST KH (N339)" manufactured by Tokai Carbon Co., Ltd.): 5.0 parts by mass

[0683] Silane coupling agent (trade name "Si75" manufactured by Evonik Degussa, bis(triethoxysilylpropyl) disulfide): 6.0 parts by mass

[0684] S-RAE oil (trade name "Process NC140" manufactured by JX Nippon Oil & Energy Co., Ltd.): 36 parts by mass

[...

Embodiment 20

[0693] 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.

[0694] Modified conjugated diene polymer (sample 1): 50 parts by mass

[0695] Modified conjugated diene polymer (sample 25, glass transition temperature: -60°C): 50 parts by mass

Embodiment 21

[0697] 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.

[0698] Modified conjugated diene polymer (sample 1): 20 parts by mass

[0699] Modified conjugated diene polymer (trade name "SLR3402" manufactured by Trinseo, glass transition temperature: -60° C.): 80 parts by mass

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Abstract

The present invention relates to a conjugated diene-based polymer composition and a tire, and provides a conjugated diene-based polymer composition having excellent rolling resistance, grip performance on wet and slippery road surfaces, and wear resistance after being made into a tire. The conjugated diene-based polymer composition contains 10-90 parts by mass of a conjugated diene polymer (A) having a glass transition temperature of -20 DEG C or higher and 10-90 parts by mass of a conjugated diene polymer (B) having a glass transition temperature of -25 DEG C or lower, the conjugated diene polymer (A) has an absolute molecular weight of 40*10<4> or more and 5000*10<4> or less as determined by a GPC-light scattering method with a viscosity detector, and a branching degree (Bn) of 8 or more as determined by the GPC-light scattering 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] Conventionally, there has been an increasing demand for lower fuel consumption of automobiles, and improvements have been demanded for materials used in tires for automobiles, especially treads of tires that come into contact with the ground. [0003] In recent years, there has been a demand for the development of materials with low rolling resistance, that is, low hysteresis loss. [0004] In addition, in order to reduce the weight of the tire, it is necessary to reduce the thickness of the tread portion, and a material with high wear resistance is also required. On the other hand, materials used for tire tread applications are required to have excellent wet skid resistance and practically sufficient destructive properties from the viewpoint of safety. [0005] Examples of rubber materials suitable for the above requirements include rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L15/00C08K3/36C08K3/04B60C1/00
CPCC08L9/06C08L15/00B60C1/0016C08K3/36C08K3/04Y02T10/86
Inventor 角谷省吾关川新一久村谦太荒木祥文
Owner ASAHI KASEI KK