Gas-and-oil impermeable hose construction
First Claim
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1. A highly gas-impermeable, moisture-proof, flexible hose comprising:
- (a) an inner tube formed from a first composition comprised of a graft polymer alloy having a continuous phase constituted of at least one polyamide resin, and a disperse phase composed of an acrylic rubber, said one polyamide resin having been grafted with said acrylic rubber;
(b) a reinforcing layer disposed over the inner tube and formed of a synthetic fibrous material or a metallic wiry material; and
(c) an outer cover laminated around the reinforcing layer and formed from a second composition comprised of a thermoplastic elastomer having (a) a continuous phase constituted of a polyolefin resin, and (b) a disperse phase composed of at least one of an ethylene-propylene-diene rubber and a butyl-based rubber, said one rubber having been subjected to vulcanization.
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Abstract
A composite hose is disclosed which is constructed essentially with an inner tube and an outer cover, the inner tube being formed from a composition comprised of a specified polymer alloy of a selected class of polyamide resins and acrylic rubbers and the outer cover from a composition comprised of a specified thermoplastic elastomer of a selected class of polyolefin resins and ethylene-propylene-diene rubbers and butyl-based rubber. Impermeability is greatly improved with respect to refrigerant gases and fuel oils.
72 Citations
33 Claims
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1. A highly gas-impermeable, moisture-proof, flexible hose comprising:
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(a) an inner tube formed from a first composition comprised of a graft polymer alloy having a continuous phase constituted of at least one polyamide resin, and a disperse phase composed of an acrylic rubber, said one polyamide resin having been grafted with said acrylic rubber; (b) a reinforcing layer disposed over the inner tube and formed of a synthetic fibrous material or a metallic wiry material; and (c) an outer cover laminated around the reinforcing layer and formed from a second composition comprised of a thermoplastic elastomer having (a) a continuous phase constituted of a polyolefin resin, and (b) a disperse phase composed of at least one of an ethylene-propylene-diene rubber and a butyl-based rubber, said one rubber having been subjected to vulcanization. - View Dependent Claims (2, 3, 4, 5, 6, 7, 21)
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8. A highly gas impermeable moisture-proof, flexible hose comprising:
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(a) an inner tube including an inner peripheral wall and an outer peripheral wall, the inner peripheral wall being formed from a third composition comprised of at least one polyamide resin or a blend thereof with a polyolefin resin, the outer peripheral wall being formed from a first composition comprised of a graft polymer alloy having a continuous phase constituted of at least one polyamide resin, and a disperse phase composed of an acrylic rubber, said one polyamide resin having been grafted with said acrylic rubber, or from a fourth composition comprised of a thermoplastic elastomer having a continuous phase constituted of a polyolefin resin, and a disperse phase made up of at least one rubber selected from the group consisting of an ethylene-propylene-diene rubber, a butyl-based rubber and an acrylonitrile-butadiene rubber, said one rubber having been subjected to vulcanization; (b) a reinforcing layer disposed over the outer peripheral wall and formed of a synthetic fibrous material or a metallic wiry material; and (c) an outer cover laminated around the reinforcing layer and formed from a second composition of a thermoplastic elastomer having a continuous phase constituted of a polyolefin resin and a disperse phase composed of at least one of an ethylene-propylene-diene rubber and a butyl-based rubber, said one rubber having been subjected to vulcanization. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22)
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23. A highly gas-impermeable, moisture-proof, flexible hose comprising:
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(a) an inner tube including an inner peripheral wall and an outer peripheral wall, the inner peripheral wall being formed from a first composition comprised of a graft polymer alloy having a continuous phase constituted of at least one polyamide resin and a disperse phase composed of an acrylic rubber, said one polyamide resin having been grafted with said acrylic rubber, the outer peripheral wall being formed from a fourth composition comprised of a thermoplastic elastomer having a continuous phase constituted of a polyolefin resin and a disperse phase made up of at least one rubber selected from the group consisting of an ethylene-propylene-diene rubber, a butyl-based rubber and an acrylonitrile-butadiene rubber, said one rubber having been subjected to vulcanization; (b) a reinforcing layer disposed over the outer peripheral wall and formed of a synthetic fibrous material or a metallic wiry material; and (c) an outer cover laminated around the reinforcing layer and formed from a second composition of a thermoplastic elastomer having a continuous phase constituted of a polyolefin resin and a disperse phase composed of at least one of an ethylene-propylene-diene rubber and a butyl-based rubber, said one rubber having been subjected to vulcanization. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification