Patent ID: 8642149

Claim:
A hose for transporting refrigerant comprising an inner tube layer including a gas barrier layer and a rubber layer adjacent to an outer surface of the gas barrier layer, wherein the gas barrier layer comprises a polyamide resin composition comprising from 0.5 to 20 parts by mass of a hydrotalcite that is not surface treated per 100 parts by mass of a modified polyamide obtained by blending a polyamide and a carboxyl group-containing modified polyolefin; the rubber layer comprises a rubber composition comprising from 1 to 15 parts by mass of an alkylphenol-formaldehyde resin per 100 parts by mass of a raw rubber and from 30 to 80 parts by mass of a carbon black per 100 parts by mass of the raw rubber; the raw rubber comprises a BIMS, a butyl rubber and/or a halogenated butyl rubber, which is a copolymer rubber and, also, an EPDM (ethylene propylene diene terpolymer); a content of the BIMS in the raw rubber is from 5 to 40 parts by mass, a total content of the BIMS and the copolymer rubber is from 20 to 80 parts by mass, and a content of the EPDM is from 80 to 20 parts by mass; and the carbon black has an N 2 SA that is greater than or equal to 75 m 2 /g and a DBP dibutyl phthalate) absorption number that is greater than or equal to 90 cm 3 /100 g.