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Rubber composition manufacturing method, rubber composition, and pneumatic tire using same

A technology of rubber composition and manufacturing method, which is applied to special tires, tire parts, transportation and packaging, etc., which can solve the problems of unconsidered mixing conditions and achieve low heat generation effect

Active Publication Date: 2014-09-03
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in these inventions, no consideration is given to the kneading conditions

Method used

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  • Rubber composition manufacturing method, rubber composition, and pneumatic tire using same
  • Rubber composition manufacturing method, rubber composition, and pneumatic tire using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0125] The present invention is described in more detail with reference to the following examples; however, the present invention is not limited to the following examples at all.

[0126] The maximum temperature and low heat build-up properties (tan δ index) of the rubber composition in each stage of kneading were evaluated according to the methods mentioned below.

[0127] Method for measuring the maximum temperature of rubber compositions in each stage of mixing

[0128] Immediately after the rubber composition was discharged from the Banbury mixer, a thermometer was inserted into the center of the rubber composition to measure the temperature. After three measurements, the arithmetic mean of the obtained data was taken as the maximum temperature.

[0129] Low fever (tanδ index)

[0130] Using a viscoelasticity measuring device (manufactured by Rheometric), tan δ of the rubber composition sample was measured at a temperature of 60° C. at a dynamic strain of 5% and a freque...

manufacture example 1

[0133] composed of average

[0134] (CH 3 CH 2 O) 3 Si-(CH 2 ) 3 -S-(CH 2 ) 6 -S 2.5 -(CH 2 ) 6 -S-(CH 2 ) 3 -Si(OCH 2 CH 3 ) 3 Production of silane coupling agent represented by (typical example C1 of silane coupling agent (II))

[0135]Put 119g (0.5mol) of 3-mercaptopropyltriethoxysilane into a 2-liter separable flask equipped with a nitrogen inlet tube, a thermometer, a Dimroth condenser (Dimroth condenser) and a dropping funnel. 151.2 g (0.45 mol) of an ethanol solution of sodium ethoxide with an active ingredient concentration of 20% was added thereto. Subsequently, it was heated to 80° C. and stirred for 3 hours. Then, it was cooled and transferred to a dropping funnel.

[0136] Next, put 69.75g (0.45mol) of 1,6-dichlorohexane into a separable flask similar to the above, heat to 80°C, and slowly add 3-mercaptopropyltriethoxysilane and The reaction product of sodium ethoxide. After the addition, it was stirred at 80° C. for 5 hours. Subsequently, it wa...

Embodiment 1 to 11 and comparative example 1 to 11

[0140] According to the compounding recipe and mixing method shown in Table 1, in each case the maximum temperature of the rubber composition can be controlled at 150 °C in the first stage of mixing in a Banbury internal mixer The rubber composition was kneaded, and in the stage (Y) of the second stage of kneading, the components shown in Table 1 were added and kneaded, and in Examples 1, 2 and 4-11 and Comparative Examples 1, 2 and 4-11, the maximum temperature of the rubber composition is controlled at 130°C. In Example 3 and Comparative Example 3, the stage (Y) of the second stage of kneading was omitted.

[0141] Next, in the final stage (Z) of kneading, a vulcanizing agent and the like are added, and in each case, the maximum temperature of the rubber composition in the final stage of kneading can be controlled to be 110° C. for kneading, by Twenty-two rubber compositions of Examples 1-11 and Comparative Examples 1-11 were prepared. The low heat build-up properties (tan...

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Abstract

Provided is a manufacturing method of a rubber composition formed by combining a rubber component (A) which comprises a natural rubber and / or a synthetic diene rubber, a filling material which contains an inorganic filling material (B), a silane coupling agent (C), and at least one type of vulcanization accelerator (D) selected from specific compounds, said method characterized by mixing the rubber composition in multiple stages: in a first mixing stage (X), a part (A') of said rubber component (A), all or a part of the inorganic filler material (B), all or a part of the silane coupling agent (C), and all or a part of the vulcanization accelerator (D) are added and mixed together, and in subsequent mixing stages, the rest (A) of the rubber component (A) is added and mixed together. This manufacturing method can increase activity of the coupling function of the silane coupling agent to obtain a rubber composition with favorably low heat generation.

Description

technical field [0001] The present invention relates to a method for producing a rubber composition containing an inorganic filler and having improved low heat build-up properties. Background technique [0002] In recent years, demand for low fuel consumption of automobiles has increased in connection with actions for global carbon dioxide emission control related to increased attention to environmental issues. In order to meet the demand, it is desired to reduce rolling resistance related to tire performance. So far, as a means of reducing tire rolling resistance, a method of optimizing the tire structure has been studied; however, at present, a technology of using a rubber composition with lower heat generation for tires has been adopted as the most general method. [0003] In order to obtain such a low heat build-up rubber composition, a method using an inorganic filler such as silica or the like is known. [0004] However, when an inorganic filler such as silica is mix...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/20B60C1/00C08K3/00C08K5/54C08L7/00C08L9/00
CPCC08J2307/00C08K5/548C08J2309/00B60C1/0025C08J3/203C08L2312/02C08K3/0033C08K3/04C08K3/36C08K5/0025B60C1/0008B60C1/0016C08K3/013C08L9/00
Inventor 松尾成晃
Owner BRIDGESTONE CORP