Hose with rubber and plastic

A method of making a hose, comprising:

• coextruding two or more polyamide layers onto a mandrel to form a veneer comprising an inner resistance layer and a polyamide layer;
• blending a first composition comprising an ethylene propylene diene monomer (EPDM), maleic anhydride and phenylenedimalemide and extruding the first composition on top of the polyamide layer to form a rubber backing layer;
• applying a reinforcement layer over the rubber backing layer;
• extruding a cover layer over the reinforcement layer to form a green hose;
• vulcanizing the green hose to form a cured hose;
• and
• expelling the cured hose from the mandrel.

A hose, comprising a multiplicity of layers including:

• a rubber backing layer directly bonded to a polyamide (PA) layer, without an intervening adhesive layer,
• wherein the rubber backing layer is prepared from a first composition comprising an ethylene propylene diene monomer (EPDM), a phenylenedimaleimide, and a maleated compound,
• wherein the hose exhibits a maximum high temperature capability of at least 150° C., and
• wherein the hose exhibits a permeation value of less than 3 kg/m2/yr for a refrigerant selected from the group consisting of R134a (1,1,2-tetrafluoroethane) and R-1234-yf (2,3,3,3-tetrafluoropropene) when tested according to SAE J2064 at 80° C.+/−2° C.