Self-supporting type pneumatic run-flat tire, and insert and bead rubber composition for run-flat capability

A technology of pneumatic tires and tires, which is applied to the reinforcement layer of pneumatic tires, special tires, tire parts, etc., which can solve the problems of weight increase, rubber product weight increase, rubber damage, etc., to improve fuel consumption performance and prevent weight increase , the effect of satisfying the durability characteristics

Inactive Publication Date: 2007-01-10
HANKOOK TIRE WORLDWIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, the specific gravity of the reinforcing type filler is about 1.8 to 2.0, which becomes the main cause of the weight increase of the rubber product
However, this cannot reduce the weight of the tire, and there are many problems in reducing the weight of the tire
[0004] In addition, it is not conducive to fatigue resistance, crack resistance, and heat resistance, and cannot maintain the required run-flat performance, causing damage to the rubber.
In particular, existing self-supporting run-flat tires cannot prevent weight increase because inserts are used for reinforcement

Method used

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  • Self-supporting type pneumatic run-flat tire, and insert and bead rubber composition for run-flat capability
  • Self-supporting type pneumatic run-flat tire, and insert and bead rubber composition for run-flat capability
  • Self-supporting type pneumatic run-flat tire, and insert and bead rubber composition for run-flat capability

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Experimental program
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Embodiment 1～2

[0041] According to the combination ratio described in Table 1, for mixing natural rubber (STR-20), polybutadiene containing syndiotactic 1,2-polybutadiene (UBEPOL Co., Ltd. VCR617), carbon black (GPF), and zinc oxide (KS#2), stearic acid (curing agent P60), anti-aging agent 1 (6PPD), anti-aging agent 2 (RD), sulfur (powder), vulcanization accelerator (TBBS), anti-deterioration agent (manufactured by Bayer) The rubber composition of KA9188) was vulcanized at 160° C. for 20 minutes. Table 2 shows the measurement results of tensile properties, loss factor (Tan δ), fatigue resistance, crack resistance, heat generation resistance and specific gravity of the rubber sheets vulcanized as above according to ASTM regulations.

[0042] Table 3 shows the results of evaluation of tire performance after manufacture of run-flat tires from the above-mentioned rubber compositions. The durability performance of a run-flat tire is expressed as follows: After the tire is assembled to the rim, t...

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Abstract

A self-supporting type pneumatic run-flat tire is optimized in location and gauge of insert rubber at sidewalls, thereby enhancing run-flat and expansion capabilities. The self-supporting type pneumatic run-flat tire comprises an insert and bead rubber composition which comprises syndiotactic 1,2-polybutadiene in order to enhance run-flat capability.

Description

technical field [0001] The present invention relates to a self-supporting type (Self-Supporting Type) run flat pneumatic tire with a radial carcass structure suitable for specifications below 60 series and an insert and bead for realizing run flat performance Rubber composition, in particular, to a self-supporting type run-flat pneumatic tire which optimizes the position and size of an insert rubber in a sidewall portion and improves run-flat performance and inflation performance, and which contains syndiotactic 1,2- Insert and bead rubber composition of polybutadiene for runflat performance. Background technique [0002] Regarding the self-supporting type deflated air tire, patent applications have been proposed by multiple manufacturers before the seventies of last century. Representative examples thereof include US Patent No. 3,949,798 of Firestone Corporation and a patent of Dunlop Corporation filed worldwide in 1974. However, in the self-supporting run-flat pneumatic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/02B60C1/00B60C17/00C08L9/00
CPCC08L9/00B60C2001/0033B60C9/14B60C17/0009C08L7/00C08L2205/02C08L2205/03Y10T152/10828Y10T152/10864C08L2666/08B60C13/00B60C17/00
Inventor 朴钟福张斗瀛
Owner HANKOOK TIRE WORLDWIDE
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