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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to special tires, tire parts, tire edges, etc. It can solve the problems of deterioration of extrusion processability, difficulty in equalization improvement, and easy change of rubber shape with time, so as to reduce tanδ, fuel The effect of improving the balance of economy and durability

Inactive Publication Date: 2016-08-17
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, extrusion processability deteriorates, resulting in rubber shape that tends to change over time, or extruded rubber that cannot have smooth edges
Therefore, handling stability, fuel economy, and extrusion processability are conflicting properties, and it is difficult to achieve balanced improvement in these properties

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0118] Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

[0119] The chemicals used in Examples and Comparative Examples are listed below in their entirety.

[0120] :TSR20

[0121] : VCR617 purchased from Ube Industries, Ltd. (high cis-BR containing SPB, SPB content: 17% by mass, melting point of SPB: 200°C, amount of boiling n-hexane-insoluble matter: 15% by mass to 18% by mass, Cis content: 98% by mass)

[0122] : BR150B (high cis BR, cis content: 97% by mass) purchased from Ube Industries, Ltd.

[0123] : Emulsion-polymerized SBR (E-SBR) 1502 available from JSR Corporation (styrene content: 23.5% by mass)

[0124] : See Table 1

[0125] : TANCAL 200 available from Takehara Chemical Industry Co., Ltd. (average particle diameter: 7.0 μm, Mohs hardness: 3)

[0126] : Crown Clay (Crown Clay) purchased from Southeastern Clay Company (average particle diameter:...

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PUM

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Abstract

Provided is a pneumatic tire which has an improved good balance among handle responsiveness, low fuel consumption, durability and extrusion processability and has a tire inner layer. A pneumatic tire in which a tire inner layer comprises a rubber composition, said pneumatic tire being characterized in that the rubber composition contains a rubber component, carbon black and an alkylphenol-sulfur chloride condensation product, wherein the carbon black has a BET specific surface area of 20 to 120 m<2> / g, the contents of the carbon black and the alkylphenol-sulfur chloride condensation product are 40 to 100 parts by mass and 2.5 to 10 parts by mass, respectively, relative to 100 parts by mass of the rubber component, a weakly reinforcing inorganic filler is contained in an amount of 40 parts by mass or less relative to 100 parts by mass of the rubber component, and a reactive phenolic resin is contained in an amount of less than 2.0 parts by mass relative to 100 parts by mass of the rubber component.

Description

technical field [0001] The present invention relates to pneumatic tires. Specifically, the present invention relates to a pneumatic tire including a tire inner layer comprising a rubber composition. Background technique [0002] Conventional tire bead apex rubber compositions have been designed especially for increasing the complex modulus of elasticity (E*) and improving handling stability such as steering response. However, although the handling stability is improved, in the case of driving with a sports utility vehicle (SUV) or driving in cold temperatures, the deformation strain becomes flat after the vehicle is stopped for a certain period of time and then restarted. The flat spot is stored in the bead apex of the tire until the temperature of the tire rises. As a result, fuel economy deteriorates. By reducing tanδ, the occurrence of such flat spots can be effectively prevented. [0003] It is known to increase E* by adding 1,2-syndiotactic polybutadiene (SPB) cryst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00B60C1/00B60C5/14C08K3/04C08K3/26C08K3/34C08L81/04
CPCB60C1/00B60C5/14C08K3/04C08L81/04C08K2201/006B60C2001/0058B60C15/06B60C2001/005C08L61/04C08K3/013C08L7/00B60C1/0008C08L9/00C08L9/06C08L61/06C08K3/26C08K5/09C08K3/22C08K3/06C08K5/47C08K5/375C08K5/43C08K3/346C08K3/34C08L91/00C08L21/00
Inventor 宫崎达也
Owner SUMITOMO RUBBER IND LTD