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US 2003/0194522 A1Published application
Aqueous liquid contact rubber part
AssigneeNone recorded
InventorsHidekazu Kurimoto, Kiyomitsu Terashima
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AssigneeNone recorded
InventorsHidekazu Kurimoto, Kiyomitsu Terashima
Estimating the term…
An object of the present invention is to provide a coolant transporting hose, which requires no cleaning treatment and also cause no problems in the coolant transporting hose itself and a fuel cell system, and a rubber material capable of forming the coolant transporting hose. Disclosed is An aqueous liquid contact rubber part having a contact portion with an aqueous liquid. The contact portion with the rubber part is made of at least a rubber vulcanizate having a volume resistivity of 1010 Ω.cm or more. When the rubber vulcanizate is immersed in an aqueous liquid having a specific conductivity (25° C.) of 3 μS/cm or less in an amount of 10 times as much the rubber vulcanizate at 100° C. for 168 hours, the specific conductivity (25° C.) of the aqueous liquid does not exceed 50 μS/cm.
An aqueous liquid contact rubber part comprising:
An aqueous liquid contact rubber part comprising:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Backward citations are indexed for grants only.
With reinforcements embedded in the wall: comprising one or more braided layers
Not modified by chemical after-treatment: ethylene-propylene or ethylene-propylene-diene copolymers
With reinforcements embedded in the wall: comprising one or more layers of a helically wound cord or wire
Compositions of oils, fats or waxes
Term end not estimated
1. Field of the Invention
The present invention relates to an aqueous liquid contact rubber part having a contact portion with an aqueous liquid. While the aqueous liquid contact rubber part will be described by way of a coolant transporting hose for a fuel cell powered electric vehicle in the present specification, the aqueous liquid contact rubber part of the present invention can also be applied to other aqueous liquid contact rubber part such as diaphragm and packing.
2. Description of the Related Art
FIG. 1 is a partial sectional view showing a coolant transporting hose for a fuel cell powered electric vehicle according to an embodiment of an aqueous liquid contact rubber part of the present invention.
FIG. 2 is a graph showing a relation between the carbon black content and the volume resistivity.
The aqueous liquid contact rubber part of the present invention and the rubber composition used to manufacture the aqueous liquid contact rubber part will now be described in detail. In the present specification, percentages are by weight unless otherwise specified.
FIG. 1 is a partial sectional view showing a coolant transporting hose 11 for a fuel cell powered electric vehicle according to an embodiment of the aqueous liquid contact rubber part of the present invention.
The coolant transporting hose 11 in FIG. 1 comprises an inner tube layer 12 as a contact portion with a coolant (aqueous liquid) and an outer tube layer 13 formed directly on the periphery of the inner tube layer 12. Between the inner tube layer 12 and the outer tube layer 13, a reinforcing layer 14 is usually formed.