a high performance thermoplastic hose useful as a power steering hose , the high performance thermoplastic hose comprising a high performance engineering thermoplastic such as polyurethane and a chlorine - containing polyolefin such as chlorinated polyethylene , chlorinated polypropylene , chlorinated copolymers containing ethylene and propylene , chlorosulfonated polyethylene , chlorosulfonated polypropylene , chlorosulfonated copolymers of ethylene and propylene or mixture thereof , is disclosed . also disclosed are a method for manufacturing the high performance thermoplastic hose , and a thermoplastic vulcanizate capable of resisting chemical attack and withstanding temperatures up to about 300 ° f .