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Rubber composition having coating affinity and bellows for rail cars

A rubber composition and affinity technology, applied in vehicle parts, channels for connecting vehicles, coatings, etc., can solve the problems of lack of coating film affinity, difficulty in ensuring the adhesion between rubber and coating film, etc. To achieve the effect of excellent film adhesion, excellent flame retardant effect, and excellent durability

Active Publication Date: 2019-09-10
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since EPDM is a non-polar rubber, the outer windshield made of EPDM lacks coating film affinity, and it is difficult to ensure the adhesion between the rubber and the coating film when the coating is applied as described above.

Method used

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  • Rubber composition having coating affinity and bellows for rail cars
  • Rubber composition having coating affinity and bellows for rail cars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8、 comparative example 1～3

[0091] Each component shown in Table 1 and Table 2 described later was blended at the ratio shown in the table, and kneaded using a Banbury mixer and an open mill to prepare a rubber composition.

[0092] Using the rubber compositions of Examples and Comparative Examples obtained in this way, each property was evaluated according to the following criteria. The results are collectively shown in Table 1 and Table 2 below.

[0093] [processability]

[0094] The Mooney viscosity of the rubber composition (kneaded product) was measured at a test temperature of 121° C. in accordance with JIS K6300-1 (2001). Then, the Mooney viscosity (ML 1+4 121° C.) was evaluated as “◯” for a sample of 60 or less, and “×” for a sample exceeding 60.

[0095] [tensile strength, elongation at break]

[0096] The rubber composition was press-molded (vulcanized) at 150° C. for 20 minutes to prepare a rubber sheet with a thickness of 2 mm. Then, JIS No. 5 dumbbell pieces were punched out from the r...

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PUM

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Abstract

Provided is a rubber composition having coating affinity comprising mainly component (A), and components (B) and (C) below. Also provided are bellows for rail cars comprising a crosslinked body of therubber composition having coating affinity. The rubber composition having coating affinity is capable of exhibiting excellent performance as a material for forming rubber products (rubber products such as bellows for rail cars) that require rubber properties including tensile strength and breaking elongation, and durability as well as coating adhesion. (A) An ethylene-propylene-diene rubber (EPDM). (B) A non-hydrogenated liquid butadiene rubber having functional group reactable with an isocyanate group and / or a hydroxyl group. (C) An organic peroxide crosslinking agent.

Description

technical field [0001] The present invention relates to a coating-film-compatible rubber composition used as a rubber product material having a high coating-film affinity, and an exterior windshield for a rail vehicle formed using the coating-film-compatible rubber composition. Background technique [0002] Between vehicles of rail vehicles (vehicle connection part), it is arranged for the main purpose of preventing people from falling from the platform into the space formed between the vehicles of the tram and reducing the air resistance of the connection part between vehicles. There is an external windshield. As such an outer windshield for rail vehicles, for example, a rubber outer windshield made of ethylene-propylene-diene rubber (EPDM) or the like is used (for example, refer to Patent Document 1). [0003] However, the outer windshields for rail vehicles are often painted on the surface. However, since EPDM is a non-polar rubber, the outer windshield made of EPDM lac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16B61D17/22C08J7/04C08K3/22C08K5/14C08L15/00B60D5/00C08J7/043C08J7/05
CPCB60D5/00C08K2003/2224C08K2003/2227C08L23/16C08J7/05C08J7/043C08K5/14C08L9/00B61D17/22C08F136/06C08K3/22C08L23/26C08L2205/03C08L2312/02
Inventor 村谷圭市
Owner SUMITOMO RIKO CO LTD
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