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Rubber composition for tire tread and pneumatic tire

A rubber composition, tire tread technology, applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of low affinity, reduced rolling resistance, high cohesion, and achieve wet performance and low rolling. The effect of excellent resistance and excellent workability

Active Publication Date: 2017-06-09
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, silica has the following problems: the affinity with the rubber component is low, and the cohesion between silicas is high, so even if only silica is blended in the rubber component, the silica does not disperse and cannot Sufficiently obtain the effect of reducing rolling resistance and the effect of improving wet performance

Method used

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  • Rubber composition for tire tread and pneumatic tire
  • Rubber composition for tire tread and pneumatic tire
  • Rubber composition for tire tread and pneumatic tire

Examples

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Embodiment

[0266] Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these Examples.

[0267]

[0268] Add cyclohexane 4533g, styrene 338.9g (3.254mol), butadiene 468.0g (8.652mol), isoprene 20.0g (0.294mol) and N,N,N',N'-tetramethylethylenediamine 0.189mL (1.271mmol), start stirring. After bringing the temperature of the contents in the reaction vessel to 50° C., 5.061 mL (7.945 mmol) of n-butyl lithium was added. After the polymerization conversion rate reached approximately 100%, 12.0 g of isoprene was further added and allowed to react for 5 minutes, and then 0.281 g (0.318 mmol), let it react for 30 minutes. Furthermore, 18.3 g (0.318 mmol) of the 40 mass % xylene solution (the same follows.) of polyorganosiloxane A represented by following formula (9) was added, and it was made to react for 30 minutes. Methanol 0.5 mL was added and stirred for 30 minutes. A small amount of anti-aging agent (Irganox 1520, manufactured by BA...

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Abstract

A rubber composition for tire treads, comprising a diene rubber component, silica, and a compound represented by the following average composition formula (1), and a pneumatic tire using the same for tire treads The polysiloxane shown above, the diene rubber component contains 20% by mass or more of a specific modified conjugated diene rubber, and the silica is 60 to 200 mass parts relative to 100 mass parts of the rubber component. parts, the polysiloxane is 1 to 20% by mass of the content of the silicon dioxide. (A)a(B)b(C)c(D)d(R1)eSiO(4‑2a‑b‑c‑d‑e) / 2(1)[In the formula (1), A means to contain sulfide B is a divalent organic group with 5 to 10 carbon atoms, C is a hydrolyzable group, D is an organic group containing a mercapto group, R1 is a monovalent hydrocarbon group with 1 to 4 carbon atoms, And satisfy the relational expressions of 0≤a<1, 0≤b<1, 0<c<3, 0<d<1, 0≤e<2, 0<2a+b+c+d+e<4. Wherein, one of a and b is not 0. ].

Description

technical field [0001] The invention relates to a rubber composition for tire tread and a pneumatic tire. Background technique [0002] In recent years, reduction in rolling resistance of tires has been demanded from the standpoint of low fuel consumption during vehicle running. In addition, from the viewpoint of safety, it is required to improve wet performance. On the other hand, there is known a method of blending silica into a rubber component constituting a tread portion of a tire to achieve both low rolling resistance and wet performance. [0003] However, silica has the following problems: the affinity with the rubber component is low, and the cohesion between silicas is high, so even if only silica is blended in the rubber component, the silica does not disperse and cannot The effect of reducing rolling resistance and the effect of improving wet performance are sufficiently obtained. [0004] Among them, as silica dispersion technology, the applicant of the presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/00C08L15/00C08K3/36C08K5/548C08L83/08C08L83/14B60C1/00
CPCB60C1/00C08K5/548C08L15/00C08L83/08C08G77/14C08G77/392B60C1/0016C08C19/25C08K3/36C08L45/00C08C19/44Y02T10/86C08L9/00C08F297/04C08C19/20C08L9/06C08F299/02
Inventor 佐藤正树三原谕
Owner THE YOKOHAMA RUBBER CO LTD