Rubber composition for hose, and hose

Patent metadata

Field	Value
Publication number	US-10221306-B2
Application number	US-201715710664-A
Country	US
Kind code	B2
Filing date	Sep 20, 2017
Priority date	Oct 18, 2016
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A rubber composition for a hose of the present technology contains: an ethylene-propylene copolymer having an ethylene content of 40 mass % or greater but less than 60 mass %; an ethylene-1-butene copolymer; and carbon black having a nitrogen adsorption specific surface area of 17 to 52 m2/g; a mass ratio of the ethylene-1-butene copolymer to the ethylene-propylene copolymer (ethylene-1-butene copolymer/ethylene-propylene copolymer) being from 10/90 to 90/10.

First claim

The invention claimed is:

1. A rubber composition for a hose comprising:
an ethylene-propylene copolymer having an ethylene content of 40 mass % or greater but less than 60 mass %;
an ethylene-1-butene copolymer; and
carbon black having a nitrogen adsorption specific surface area of 17 to 52 m 2 /g;
a mass ratio of the ethylene-1-butene copolymer to the ethylene-propylene copolymer (ethylene-1-butene copolymer/ethylene-propylene copolymer) being from 10/90 to 90/10.

2. The rubber composition for a hose according to claim 1 , wherein a content of the carbon black is from 55 to 130 parts by mass per 100 parts by mass total of the ethylene-propylene copolymer and the ethylene-1-butene copolymer.

3. The rubber composition for a hose according to claim 1 , further comprising an anti-aging agent having a mercapto group.

4. The rubber composition for a hose according to claim 2 , further comprising an anti-aging agent having a mercapto group.

5. A hose comprising an outermost layer formed with the rubber composition for a hose described in claim 1 .

6. The hose according to claim 5 , wherein the hose comprises a reinforcing layer arranged on an inner side of the outermost layer, and the reinforcing layer is a fiber reinforcing layer in which reinforcing yarn is braided into a spiral structure and/or a braid structure.

7. The hose according to claim 5 , wherein the hose is an air conditioner hose for an automobile.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Sugihara Koki

Classifications

• F16L11/12

  with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting (F16L11/11 takes precedence) · CPC title

• F16L11/088

  comprising a combination of one or more layers of a helically wound cord or wire with one or more braided layers · CPC title

• F16L11/08

  with reinforcements embedded in the wall (F16L11/11 takes precedence) · CPC title

• F16L11/04

  made of rubber or flexible plastics · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title