Fuel hose

Abstract

A fuel hose comprising a laminated structure of a tubular resin layer and an adjoining rubber layer, the rubber layer being formed by a rubber composition containing the following (A) to (E) as essential components and the following (F) at less than 0.1 parts by weight based on 100 parts by weight of the following (A) as an optional component, and the resin layer being formed by a material containing a tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride-perfluoroalkyl vinyl ether quaternary polymer as a main component: (A) diene rubber;(B) a sulfur vulcanizing agent;(C) at least one selected from the group consisting of 1,8-diazabicyclo[5.4.0]undecene-7 salt, 1,5-diazabicyclo[4.3.0]nonene-5 salt, 1,8-diazabicyclo[5.4.0]undecene-7 and 1,5-diazabicyclo[4.3.0]nonene-5;(D) at least one of metallic salt of carbamate and metallic salt of thiazole;(E) magnesium oxide; and(F) zinc oxide.

Description

BRIEF DESCRIPTION OF THE DRAWING

The sole FIGURE of the drawing is a diagram illustrating the construction of an exemplary automotive fuel hose according to the present invention.

Claims

1. A fuel hose comprising a laminated structure of a tubular resin layer and an adjoining rubber layer, the rubber layer being formed by a rubber composition containing the following (A) to (E) as essential components and the following (F) at less than 0.1 parts by weight based on 100 parts by weight of the following (A) as an optional component, and the resin layer being formed by a material containing a tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride-perfluoroalkyl vinyl ether quaternary polymer as a main component: (A) diene rubber;(B) a sulfur vulcanizing agent;(C) at least one selected from the group consisting of 1,8-diazabicyclo[5.4.0]undecene-7 salt, 1,5-diazabicyclo[4.3.0]nonene-5 salt, 1,8-diazabicyclo[5.4.0]undecene-7 and 1,5-diazabicyclo[4.3.0]nonene-5;(D) at least one of metallic salt of carbamate and metallic salt of thiazole;(E) magnesium oxide; and(F) zinc oxide.

2. A fuel hose as set forth in claim 1, wherein the diene rubber (component (A)) is at least one selected from the group consisting of acrylonitrile-butadiene rubber, a blend of acrylonitrile-butadiene rubber and polyvinyl chloride, an ethylene-propylene-diene terpolymer and hydrin rubber.

3. A fuel hose as set forth in claim 1, wherein the magnesium oxide (component (E)) is present at 3 to 20 parts by weight based on 100 parts by weight of the diene rubber (component (A)).

4. A fuel hose as set forth in claim 1, wherein the metallic salt of carbamate of the component (D) is at least one selected from the group consisting of a zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate and zinc dibutyldithiocarbamate.

5. A fuel hose as set forth in claim 1, wherein the metallic salt of thiazole of the component (D) is zinc mercaptobenzothiazole.

6. A fuel hose as set forth in claim 1 comprising a tubular inner layer, an intermediate layer formed on an outer peripheral surface of the inner layer and an outer layer formed on an outer peripheral surface of the intermediate layer, the inner layer and the outer layer being formed by a rubber composition containing the above-mentioned (A) to (E) as essential components and the above-mentioned (F) at less than 0.1 parts by weight based on 100 parts by weight of the above-mentioned (A) as an optional component, and the intermediate layer being formed by a material containing a tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride-perfluoroalkyl vinyl ether quaternary polymer as a main component.