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Sidewall rubber composition and tire

A rubber composition and rubber technology, applied in special tires, tire parts, transportation and packaging, etc., can solve problems such as noise and deterioration, and achieve the effect of improving passing noise and excellent low rolling resistance performance

Pending Publication Date: 2022-01-21
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when the tan δ (loss tangent) of the rubber composition is kept low in the rubber composition for side walls as described in PTL 1, although rolling resistance and low fuel consumption can be improved, there is a problem that when The noise generated from the tires (passing noise) when the vehicle passes by is aggravated

Method used

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  • Sidewall rubber composition and tire

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Embodiment

[0074]The present disclosure is described in more detail below with reference to Examples. Note: The present disclosure is not limited to the following examples.

[0075]

[0076] Rubber compositions A and B for sidewalls were prepared according to the formulations listed in Table 1 using a general Banbury mixer. The blending amount of each component listed in Table 1 is the amount (parts by mass) relative to 100 parts by mass of the rubber component.

[0077] The obtained sidewall rubber compositions A and B were vulcanized at 160° C. for 15 minutes, and the loss tangent (tan δ) of the obtained vulcanized rubber at 0° C. and 30° C. was measured using a spectrometer manufactured by Ueshima Seisakusho Co., Ltd. Measured under the conditions of 2% initial strain, 1% dynamic strain and a frequency of 52 Hz. Table 2 lists the measured tan δ at 0°C and 30°C and the calculated 0°C tan δ / 30°C tan δ.

[0078] [Table 1]

[0079] Composition for side walls A B nat...

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Abstract

The present invention aims to provide a sidewall rubber composition that has excellent low rolling resistance characteristics and can improve pass-by noise, when applied to a tire. In order to achieve this aim, this sidewall rubber composition used in tire sidewalls is characterized by having a tan delta ratio at 0 degC relative to a tan delta ratio at 30 degC (0 degC tan delta / 30 degC tan delta) of at least 2.00.

Description

technical field [0001] The present disclosure relates to a rubber composition for a sidewall and a tire. Background technique [0002] From the viewpoint of improving the fuel efficiency of a vehicle, there is known a technique for optimizing a rubber composition forming a sidewall portion of a tire (rubber composition for a sidewall). [0003] For example, JP2010013553A (PTL 1) describes a technology of a rubber composition for a side wall that achieves improved low heat build-up (low tan δ) by adjusting rubber components and fillers. [0004] However, when the tan δ (loss tangent) of the rubber composition is kept low in the rubber composition for side walls as described in PTL 1, although rolling resistance and low fuel consumption can be improved, there is a problem that when The noise (passing noise) generated from the tires when the vehicle passes by is exacerbated. [0005] Therefore, it has been desired to develop a rubber composition for a sidewall of a tire which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00C08L7/00C08L9/00C08L9/06C08L21/00
CPCC08L9/00C08L7/00Y02T10/86B60C1/0025C08L9/06C08K3/04C08L57/02
Inventor 田原圣一川岛启介
Owner BRIDGESTONE CORP
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