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Railcar shock absorber rubber composition

A rubber composition and buffer rubber technology are applied in the field of rubber compositions for buffer rubbers for railway vehicles, and can solve the problems of reduced elastic modulus and difficulty in achieving electrical insulation at the same time.

Inactive Publication Date: 2012-05-23
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, it is difficult to achieve both electrical insulation and suppression of reduction in elastic modulus after deformation load in cushion rubber for railway vehicles.

Method used

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  • Railcar shock absorber rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] (Preparation of rubber composition)

[0031] The rubber compositions of Examples 1 to 3 and Comparative Examples 1 to 4 were blended with 100 parts by weight of the rubber component according to the compounding recipe in Table 1, and kneaded using a normal Banbury mixer to prepare rubber compositions. Each compounding agent described in Table 1 is shown below.

[0032] a) Rubber composition Natural rubber RSS#3

[0033] b) Sulfur ("5% oil treatment sulfur", manufactured by Hosoi Chemical Industry Co., Ltd.)

[0034] c) Vulcanization accelerator

[0035] (A) NS (n-tert-butyl-2-benzothiazolyl sulfenamide) (Nokusera-NS-P), manufactured by Ouchi Shinko Chemical Co., Ltd.)

[0036] (B) TS (tetramethylthiuram monosulfide) (Nokusera-TS), manufactured by Ouchi Shinko Chemical Co., Ltd.)

[0037] d) Carbon black DBP oil absorption is 101cm 3 / 100g of carbon black HAF ("シィスト3", manufactured by Tokai Carbon Co., Ltd.)

[0038] e) Silica

[0039] (A) BET specific surface are...

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Abstract

Provided is a railcar shock absorber rubber composition that can provide high cured rubber hardness and simultaneously achieve electrical insulating properties and suppression of a decrease in elastic modulus after strain loading, and includes a diene rubber as a main component, hydrous silicic acid or wet silica with a BET specific surface area of 70 to 130 m2 / g, and carbon black with a DBP oil absorption of 130 cm3 / 100 g or less, wherein 30 to 100 parts by weight of the hydrous silicic acid or wet silica and 5 to 40 parts by weight of the carbon black are present based on 100 parts by weight of the total amount of the rubber component.

Description

technical field [0001] The rubber composition for a railway vehicle cushion rubber of the present invention is a rubber composition mainly composed of a diene rubber, and relates to a railway vehicle cushion rubber that achieves both electrical insulation and suppression of reduction in elastic modulus after deformation load Useful rubber compositions. Background technique [0002] Generally, in railroad vehicles, cushion rubbers having various shapes and anti-vibration properties are used. For example, sleeve-type cushioning rubber is part of the force transmission connection installed between the vehicle body and the trolley, and such cushioning rubber absorbs force generated by up, down, left, and right movements to generate a restoring force against the movement. In the cushion rubber used for railway vehicles, it is important that the static spring constant, which is the modulus of elasticity of the product, has little change with time. [0003] Generally, in anti-vib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08K3/36C08K3/04
CPCC08L7/00C08K3/04C08K3/36C08L9/00C08L21/00
Inventor 畦地利夫
Owner TOYO TIRE & RUBBER CO LTD
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