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Rubber composition for tires

A rubber composition and tire technology, which is applied in special tires, tire parts, rolling resistance optimization, etc., can solve problems such as easy agglomeration, lack of rubber affinity, and insufficient dispersion, and achieve improved dispersion, wet roads, etc. Adhesion performance improvement, effect of improving low rolling resistance and wet road adhesion performance

Active Publication Date: 2015-03-18
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the following problems: the surface of the silica has alkanol groups, it is easy to aggregate, and it lacks affinity with rubber, so the dispersibility is sometimes insufficient. In this case, the loss tangent to the rubber composition ( tanδ) and other dynamic viscoelastic properties to modify the effect is not obvious

Method used

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  • Rubber composition for tires
  • Rubber composition for tires

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Embodiment

[0040] The compounding agent shown in Table 4 was used as a common compound, and 26 kinds of rubber compositions for tires (Examples 1-11, Comparative Examples 1-15) were prepared by the following method according to the raw material formulations shown in Tables 1-3: Components other than sulfur and the vulcanization accelerator were kneaded for 5 minutes in a 1.8 L closed mixer, and then the masterbatch was released, and sulfur and the vulcanization accelerator were added thereto, followed by kneading by an open tumbler. In addition, in Tables 1 to 3, since modified S-SBR4 and unmodified SBR contain 37.5 parts by weight of oil-extending oil, the column of compounding amount not only shows the actual compounding amount, but also shows in parentheses The net compounding amount of each SBR after removing the extended oil is shown. In addition, the blending amount of the aromatic oil is properly adjusted so that the total oil amount and / or rubber hardness in the rubber compositio...

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Abstract

A rubber composition comprises from 2 to 50 parts by weight of an aromatic modified terpene resin having a softening point of ≧100° C., and two types of silica, a silica X and a silica Y, at a total quantity of 60 to 130 parts by weight relative to 100 parts by weight of a diene rubber containing from 5 to 50 weight % of a modified S-SBR having a vinyl content of not lower than 60 weight %. A functional group in the modified S-SBR reacts with a silanol group, a proportion of silica relative to the total quantity of a reinforcing filler containing the silica and carbon black is not lower than 85 weight %, a nitrogen specific surface area of the silica X is not lower than 140 m2 / g, and a nitrogen specific surface area of the silica Y is not lower than 100 m2 / g but lower than 140 m2 / g.

Description

technical field [0001] The present invention relates to a rubber composition for tires which can further improve the performance of low rolling resistance and wet road adhesion compared with the existing level. Background technique [0002] In recent years, the Japan Automobile Tire Association (JATMA) has begun to implement a marking (marking method) system for pneumatic tires for passenger cars, requiring both low rolling resistance and wet road adhesion performance at a higher level. In particular, the requirements for wet road adhesion performance are extremely high, and pneumatic tires with wet road adhesion performance up to grade A according to the marking system have not yet been developed. [0003] Conventionally, there is known a method of compounding silica into a rubber composition constituting a tread portion of a pneumatic tire in order to improve the balance between low rolling resistance and wet grip performance. However, this method has the following proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L15/00B60C1/00C08K3/04C08K3/36C08L45/00
CPCC08L47/00B60C1/0016C08L15/00B60C1/00C08K3/04C08L9/00C08L9/06C08L91/00C08L93/00C08C19/22C08K2201/006C08K2201/014C08K3/36Y02T10/86
Inventor 武田慎也
Owner THE YOKOHAMA RUBBER CO LTD
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