Rubber composition for tyre side wall and oerated tyre using said rubber composition
A rubber composition and technology for pneumatic tires, applied to tire sidewalls, special tires, tire parts, etc., can solve problems such as inability to manufacture lightweight tires, damage, and insufficient handling stability
Inactive Publication Date: 2004-10-13
SUMITOMO RUBBER IND LTD
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- Abstract
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- Application Information
AI Technical Summary
Problems solved by technology
However, if the above-mentioned known technology is used, since the kneading temperature of the rubber composition is high and exceeds the melting point of the polyolefin, the polyolefin after compounding cannot be completely dispersed.
Therefore, the handling stability is insufficient, and it is impossible to manufacture a lightweight tire
Moreover, since the powder of the polyolefin is not well adhered to the diene-based rubber, it is likely to become the nucleus of damage.
[0004] In order to reduce the road noise of tires, there is a known technology that embeds a thermoplastic elastomer composition on the sidewall (refer to Japanese Patent, Japanese Patent Laid-Open No. 9-300921). Although this technology can maintain steering stability, it cannot reduce rolling resistance.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1～3 and comparative example 1～3
[0026] The components without sulfur and vulcanization accelerator were kneaded with a 1.7L Banbury manufactured by Kobe Seiko Co., Ltd. to obtain a kneaded product, and sulfur and a vulcanization accelerator were added to the kneaded product. Tumbler to mix. The obtained mixture was vulcanized at a temperature of 150° C. for 30 minutes to obtain a rubber composition for tire sidewalls. Table 1 shows the components used in Examples and Comparative Examples. The PP powder used was H-700 manufactured by Idemitsu Petrochemical Co., Ltd. with a particle size of 70 μm and a melting point of 165° C. In Examples and Comparative Examples, PP powder was used for the sidewall, but the present invention is not limited thereto.
[0027] Element
diene rubber
Natural Rubber (RSS #3 Scale)
Butadiene rubber (manufactured by Ube Industries, Ltd.)
N550 (manufactured by Showa Cabot Co., Ltd.)
Operation oil
Diana Process Oil PS...
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Abstract
The present invention aims to provide a lightweight tire without decreasing durability and to reduce rolling resistance and improve steering stability of the tire. Specifically, the present invention relates to a rubber composition for a sidewall comprising 20 to 70 parts by weight of an inorganic filler, and 5 to 35 parts by weight of polypropylene powder, based on 100 parts by weight of a rubber component, which satisfies the following equation: (amount of polypropylene powder) <= (amount of inorganic filler + amount of polypropylene powder) / 2.
Description
technical field [0001] The present invention relates to a rubber composition for a tire sidewall for passenger vehicles and a pneumatic tire using the rubber composition. Background technique [0002] In order to reduce the rolling resistance of tires, weight reduction of tires has been thought of. As a conventional method for reducing the weight of tires, there is a method of reducing the amount of rubber used to form the tire, but this method reduces the durability of the tire. In addition, since the amount of rubber used is reduced, the tire's rigidity and handling stability are reduced. If the amount of filler in the rubber compound is reduced, the rolling resistance can be reduced, but the reinforcement of the rubber is reduced. [0003] In addition, if a thermoplastic elastomer or an olefin resin is blended into the rubber component as a reinforcing agent for fibers, it is known that the fatigue of the rubber can be improved and the heat...
Claims
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IPC IPC(8): B60C1/00C08K3/00C08L21/00C08L23/12
CPCB60C1/00C08L23/12C08L21/00Y02T10/86C08L2666/06
Inventor 中村崇国泽铁也松尾俊朗
Owner SUMITOMO RUBBER IND LTD