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Rubber composition, method for producing rubber composition, and tire

A technology of rubber composition and manufacturing method, applied in special tires, tire parts, tire treads/tread patterns, etc., to achieve the effects of improving low loss and dispersibility

Inactive Publication Date: 2019-11-22
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although the technology of Patent Document 1 can improve the elastic modulus of the rubber composition and reduce the loss to a certain extent, there is still room for improvement in further reducing the loss.

Method used

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  • Rubber composition, method for producing rubber composition, and tire
  • Rubber composition, method for producing rubber composition, and tire
  • Rubber composition, method for producing rubber composition, and tire

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Experimental program
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preparation example Construction

[0286] Regarding the proportion of the rubber component used in the preparation of the preliminary master batch, the proportion is preferably 10% by mass or more, more preferably 20% by mass or more, and most preferably 100% by mass of the rubber component. Setting the ratio of the rubber component within the aforementioned range preferably improves the interaction between the rubber component and the reinforcing filler, thereby ensuring further better low loss and further higher abrasion resistance. Production of rubber compositions.

[0287] The aforementioned components are the same as those described in the description of the above-mentioned rubber composition (rubber component, tetrazine-based component, reinforcing filler, and other components).

[0288]

[0289] The method for producing the rubber composition of the present invention includes a kneading step of kneading the compounding components consisting of the rubber component (A) containing diene rubber, the tetr...

Embodiment 1

[0319] (Samples 1-1~1-10, 2-1~2-10, 3-1~3-10, 4-1~4-10, 5-1~5-10, 6-1~6-10, 7-1~7-10, 8-1~8-10, 9-1~9-10, 10-1~10-8 and 11-1~11-15)

[0320] Samples of rubber compositions according to the compounding formulations shown in Tables 1 to 6 were prepared by kneading the relevant compounding ingredients by using a sand blast mill. Regarding the kneading of the compounding ingredients, as shown in Tables 1 to 6, preparations in which a preliminary masterbatch obtained by kneading at least a part of the rubber component and the tetrazine-based compound in advance and the remaining compounding ingredients were kneaded were prepared, respectively. One set of samples, and another set in which all compounding ingredients were compounded together.

[0321] For each sample thus prepared, the tan δ value and abrasion resistance were evaluated by the following methods.

[0322] (1) Wear resistance

[0323] For each sample, the amount of abrasion (mm 3): vulcanized rubber obtained by vulc...

Embodiment 2

[0376] (Samples 1 to 11)

[0377] Samples of rubber compositions were prepared according to the compounding recipe and kneading method shown in Table 1. The maximum temperature of the mixture in the first mixing stage for each sample is shown in Table 1. In the preparation of the samples of these rubber compositions, the second mixing stage was carried out after the first mixing stage. A Banbury internal mixer was used for mixing.

[0378]

[0379] (1) Dynamic storage elastic modulus (E')

[0380] For the rubber composition of each sample, the dynamic storage elastic modulus (E') was measured by subjecting the rubber composition to vulcanization at 160°C for 15 minutes to obtain a vulcanized rubber; and at a temperature of 30°C with an initial strain of The dynamic storage elastic modulus (E') of the vulcanized rubber thus obtained was measured by using a spectrophotometer manufactured by Ueshima Seisakusho Co., Ltd. under conditions of 2%, a dynamic strain of 1%, and a fre...

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Abstract

The purpose of the present invention is to provide a rubber composition having good abrasion resistance and excellent low-loss properties. In order to achieve the foregoing, the present invention is characterized by comprising: a rubber component containing a diene-based rubber; and a tetrazine compound.

Description

technical field [0001] The present invention relates to a rubber composition, a method for producing the rubber composition, and a tire. Background technique [0002] Recently there has been an increased demand for low fuel consumption vehicles, whereby tires with small rolling resistance are required. Therefore, with regard to rubber compositions used for treads of tires and the like, those having a low tan δ value and satisfactory low heat build-up properties are required. [0003] Satisfactory low heat build-up properties of the rubber composition as described above can be achieved, for example, by reducing the content of reinforcing fillers such as carbon black and silica. However, reducing the content of the reinforcing filler in the rubber composition causes the problems of a reduction in the wear resistance of the tread rubber and a deterioration in reinforcing properties such as the cut resistance and crack resistance of the rubber at the same time. [0004] Furthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00B60C1/00B60C15/06B60C17/00C08J3/20C08K3/04C08K3/36C08K5/3477C08L7/00
CPCB60C1/00B60C15/06B60C17/00C08K3/04C08K3/36C08K5/3477C08K5/548C08L7/00C08L9/00C08L9/06C08J3/20B60C1/0016B60C1/0025B60C11/0008B60C2001/0058B60C2011/0025C08J3/226C08J2307/00C08J2309/00C08J2309/06C08J2409/00C08J2409/06C08J2447/00C08K13/02C08K2201/014C08L2201/08
Inventor 户田匠石桥健太赤羽秀信田原圣一曽根辽大
Owner BRIDGESTONE CORP
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