The Yokohama Rubber Co., Ltd.

Koki Sugihara

Daisuke Maeda

Ikuma Yusa

The present invention is to provide a rubber composition for a hose and the like, the rubber composition having excellent oil resistance and low-temperature performance. A rubber composition for a hose, the rubber composition comprising: a hydrogenated acrylonitrile butadiene rubber having an acrylonitrile amount of 24 mass % or less, a carbon black, a peroxide, and a triallyl isocyanurate; a content of the peroxide being 2.4 parts by mass or more per 100 parts by mass of the hydrogenated acrylonitrile butadiene rubber; and a content of the triallyl isocyanurate being 1.9 parts by mass or more per 100 parts by mass of the hydrogenated acrylonitrile butadiene rubber, and a hose formed by using the rubber composition for a hose.

Rubber composition for hose and hose

A refrigerant-transporting hose including an inner tube, an outer tube, and a reinforcing layer between the inner tube and the outer tube, the outer tube being formed of an outer tube rubber composition, the outer tube rubber composition containing a brominated copolymer rubber obtained by brominating a copolymer rubber of isomonoolefin and p-alkylstyrene, the content of the repeating units having bromine constituting the brominated copolymer rubber being from 0.8 to 1.5 mol % with respect to the total amount of the repeating units constituting the brominated copolymer rubber, a carbon black A having a dibutyl phthalate absorption amount of 40 cm/100 g or less, a brominated alkylphenol resin, and zinc oxide, the content of the carbon black A being 35 parts by mass or greater with respect to 100 parts by mass of the brominated copolymer rubber. Such refrigerant-transporting hose achieves both workability and sealing property at an excellent level.

Refrigerant-transporting hose

Provided are a rubber composition for hoses containing acrylonitrile butadiene rubber, a filler, a resorcin-formaldehyde precondensate, an aldehyde-ammonia vulcanization accelerator, and a fatty acid diester, and a hose including a layer formed using the same.

Rubber composition for hoses, and hose

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 m/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.

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Hiratsuka, Japan

Koki Sugihara