Rubber Composition for Outside Hood and Outside Hood for Railway Vehicle

Patent metadata

Field	Value
Publication number	US-2017130042-A1
Application number	US-201515316821-A
Country	US
Kind code	A1
Filing date	May 29, 2015
Priority date	Jun 6, 2014
Publication date	May 11, 2017
Grant date	—

Abstract

The present technology is: a rubber composition for an outside hood, the rubber composition containing, per 100 parts by mass of one type or two or more types of ethylene-propylene-diene terpolymers, at least 5 parts by mass of silica, and sulfur and/or a peroxide compound, a Mooney viscosity of the one type of ethylene-propylene-diene terpolymer being 50 or greater, a diene amount in the one type of ethylene-propylene-diene terpolymer being at least 8 mass % of the one type of ethylene-propylene-diene terpolymer, an average Mooney viscosity of the two or more types of ethylene-propylene-diene terpolymers being 50 or greater, and an average diene amount in the two or more types of ethylene-propylene-diene terpolymers being at least 8 mass % of the two or more types of ethylene-propylene-diene terpolymers; and an outside hood for a railway vehicle produced using the same.

First claim

1 . A rubber composition for an outside hood, the rubber composition comprising, per 100 parts by mass of one type or two or more types of ethylene-propylene-diene terpolymers,
5 parts by mass or greater of silica, and at least one selected from the group consisting of sulfur and a peroxide compound, a Mooney viscosity of the one type of ethylene-propylene-diene terpolymer being 50 or greater, a diene amount in the one type of ethylene-propylene-diene terpolymer being 8 mass % or greater of the one type of ethylene-propylene-diene terpolymer, an average Mooney viscosity of the two or more types of ethylene-propylene-diene terpolymers being 50 or greater, and an average diene amount in the two or more types of ethylene-propylene-diene terpolymers being 8 mass % or greater of the two or more types of ethylene-propylene-diene terpolymers.

2 . The rubber composition for an outside hood according to claim 1 , wherein the amount of the silica is from 10 to 50 parts by mass per 100 parts by mass of the one type or two or more types of ethylene-propylene-diene terpolymers.

3 . The rubber composition for an outside hood according to claim 1 , wherein an amount of the sulfur is from 0.1 to 4 parts by mass per 100 parts by mass of the one type or two or more types of ethylene-propylene-diene terpolymers.

4 . The rubber composition for an outside hood according to claim 1 , wherein the amount of the sulfur is from 0.2 to 4 parts by mass per 100 parts by mass of the one type or two or more types of ethylene-propylene-diene terpolymers.

5 . The rubber composition for an outside hood according to claim 1 , wherein an amount of the peroxide compound is from 1 to 10 parts by mass per 100 parts by mass of the one type or two or more types of ethylene-propylene-diene terpolymers.

6 . The rubber composition for an outside hood according to claim 1 , further comprising diethylene glycol, wherein
an amount of the diethylene glycol is from 0.1 to 3 parts by mass per 100 parts by mass of the one type or two or more types of ethylene-propylene-diene terpolymers.

7 . The rubber composition for an outside hood according to claim 1 , further comprising carbon black, wherein
an amount of the carbon black is 10 parts by mass or less per 100 parts by mass of the one type or two or more types of ethylene-propylene-diene terpolymers.

8 . The rubber composition for an outside hood according to claim 1 , comprising the two or more types of ethylene-propylene-diene terpolymers, wherein
at least one type of the two or more types of ethylene-propylene-diene terpolymers is an ethylene-propylene-diene terpolymer having a Mooney viscosity of 50 or greater, and at least another one type of the two or more types of ethylene-propylene-diene terpolymers is an ethylene-propylene-diene terpolymer having a Mooney viscosity of less than 50.

9 . The rubber composition for an outside hood according to claim 1 , comprising the two or more types of ethylene-propylene-diene terpolymers, wherein
among the two or more types of ethylene-propylene-diene terpolymers, each of diene amounts of at least two types of ethylene-propylene-diene terpolymers is 8 mass % or greater of each of the ethylene-propylene-diene terpolymers.

10 . The rubber composition for an outside hood according to claim 1 , comprising the two or more types of ethylene-propylene-diene terpolymers, wherein
among the two or more types of ethylene-propylene-diene terpolymers, a diene amount of at least one type of ethylene-propylene-diene terpolymer is 5 mass % or less of the at least one type of ethylene-propylene-diene terpolymer.

11 . The rubber composition for an outside hood according to claim 1 , comprising three types of the ethylene-propylene-diene terpolymers, wherein
among the three types of ethylene-propylene-diene terpolymers, a diene amount of one type of ethylene-propylene-diene terpolymer X is 5 mass % or less of the one type of ethylene-propylene-diene terpolymer X.

12 . The rubber composition for an outside hood according to claim 1 , further comprising a flame retardant.

13 . The rubber composition for an outside hood according to claim 1 , further comprising a silane coupling agent, wherein
a content of the silane coupling agent is from 0.1 to 10 parts by mass per 100 parts by mass of the one type or two or more types of ethylene-propylene-diene terpolymers.

14 . The rubber composition for an outside hood according to claim 13 , wherein the silane coupling agent is a sulfur-based silane coupling agent having a sulfur atom.

15 . An outside hood for a railway vehicle produced by using the rubber composition for an outside hood described in claim 1 .

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Morita Tomohiro

Classifications

• C08L23/16 Primary

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title

• B61D1/00

  Carriages for ordinary railway passenger traffic (mine cars B61D11/00; tramcars B61D13/00) · CPC title

• B61D17/20

  Communication passages between coaches; Adaptation of coach ends therefor · CPC title

• C08K13/02

  Organic and inorganic ingredients · CPC title

• C08K3/04

  Carbon · CPC title