Rubber composition for tire and pneumatic tire

A rubber composition and a technology for pneumatic tires, which are applied in the fields of rubber compositions for tires and pneumatic tires, can solve the problem of insufficient improvement in tear strength and fatigue resistance, undocumented porous inorganic fillers or layered viscosity mineral shapes, etc. problem, to achieve the effect of reducing rolling resistance

Inactive Publication Date: 2012-09-05
TOYO TIRE & RUBBER CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

However, in this method, the airtightness is improved, but the tear strength and fatigue resistance are not sufficiently improved, and there is room for further improvement in this point
In addition, the following Patent Documents 2 and 3 also describe rubber compositions mixed with porous inorganic fillers or layered viscosity minerals, but do not describe specific characteristics such as the shape of the porous inorganic fillers or layered viscosity minerals.

Method used

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

Examples

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Embodiment Construction

[0021] The rubber composition for tires of the present invention contains at least a rubber component and an inorganic filler. In the present invention, it is preferable to contain a diene rubber as a rubber component.

[0022] Examples of diene rubber include natural rubber (NR), polyisoprene rubber (IR), styrene-butadiene rubber (SBR), polybutadiene rubber (BR), Diene rubbers such as butadiene rubber (SPB), chloroprene rubber (CR), and nitrile rubber (NBR) can be used alone or in combination of two or more. As these exemplified diene rubbers, terminal-modified substances (for example, terminal-modified BR or terminal-modified SBR, etc.), or substances modified to impart desired characteristics (such as modified NR). In addition, for polybutadiene rubber (BR), in addition to rubber synthesized using cobalt (Co) catalyst, neodymium (Nd) catalyst, nickel (Ni) catalyst, titanium (Ti) catalyst, lithium (Li) catalyst, it is also possible to use Rubber synthesized by the polymer...

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Abstract

A rubber composition for tire, comprising at least a rubber component and an inorganic filler, wherein the inorganic filler has an angle of repose of 40 degrees or more, a Mohs' hardness of 2.0 or less, a BET specific surface area (BETS) (m2 / g) of 10 m2 / g or more, and a ratio (DBP) / (BET5) of the amount (ml / 100 g) of dibutyl phthalate (DBP) absorbed to the BET specific surface area (BET5) (m2 / g) of 2.0 or more, and wherein the content of the inorganic filler is from 0.5 to 50 parts by mass based on 100 parts by mass of the rubber component.

Description

technical field [0001] The present invention relates to a rubber composition for tires containing at least a rubber component and an inorganic filler, and a pneumatic tire capable of improving modulus of elasticity, fatigue resistance and pneumatic tire in a balanced manner without lowering the rubber physical properties of vulcanized rubber. Anti-damage properties and improved low heat release to reduce rolling resistance. Background technique [0002] In general, methods for improving the modulus of elasticity (hardness) and fracture resistance (breaking strength or tear strength) of vulcanized rubber reinforced with reinforcing fillers such as carbon black or silica include the use of special carbon black or A method of replacing a part of carbon black with silica. These methods have the effect of improving the modulus of elasticity and fracture resistance, but have disadvantages such as increased viscosity of the unvulcanized rubber composition and poor processability. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08L9/06C08K3/34C08K3/04C08K3/36B60C1/00
CPCB60C1/0016C08L7/00C08L9/00C08L9/06C08K3/346
Inventor 宇野仁长谷川真也
Owner TOYO TIRE & RUBBER CO LTD
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