HOSES, COMPOSITIONS, AND METHODS OF MAKING THE SAME

1 . A hose comprising:

a composition comprising a silane-crosslinked polyolefin elastomer and a filler;

wherein the composition exhibits a compression set of from about 5% to about 35%, as measured according to ASTM D 395 Method B (168 hrs at 150° C.); and

wherein the composition has a density from about 0.88 g/cm 3 to about 1.05 g/cm 3 .

2 . The hose of claim 1 , wherein the compression set is from about 10% to about 30%.

3 . The hose of claim 1 , wherein the silane-crosslinked polyolefin elastomer exhibits a crystallinity of from about 5% to about 25%.

4 . The hose of claim 1 , wherein the silane-crosslinked polyolefin elastomer has a glass transition temperature of from about −75° C. to about −25° C.

5 . The hose of claim 1 , wherein the silane-crosslinked polyolefin elastomer comprises a first polyolefin having a density less than 0.86 g/cm 3 , a second polyolefin, a silane crosslinker, a radical initiator, and a non-metal condensation catalyst.

6 . The hose of claim 1 , wherein the density of the composition is from about 0.92 g/cm 3 to about 1.0 g/cm 3 .

7 . The hose of claim 1 , wherein the density of the composition is from about 0.95 g/cm 3 to about 0.98 g/cm 3 .

8 . The hose of claim 1 , wherein the composition exhibits thermoplastic properties during processing and thermoset properties after the composition is cured.

9 . A hose for transferring coolant liquid in a motor of a vehicle, the hose comprising:

a first layer of a first silane-crosslinked polyolefin elastomer;

a second layer of a second silane-crosslinked polyolefin elastomer; and

a textile reinforcement embedded between the first and second layers of the silane-crosslinked polyolefin elastomers.

10 . The hose of claim 9 , wherein the textile reinforcement is made by knitting, spiraling, braiding, or a combination thereof.

11 . The hose of claim 9 , wherein the textile reinforcement is a yarn comprising a polyamide, a polyester, a polyaramid, or a combination thereof.

12 . The hose of claim 9 , wherein the hose has a wall thickness of from about 1 millimeter to about 4 millimeters.

13 . The hose of claim 9 , wherein the hose has a wall thickness of from about 1.5 millimeter to about 2.5 millimeters.

14 . The hose of claim 9 , wherein the first silane-crosslinked polyolefin elastomer and the second silane-crosslinked polyolefin elastomer are chemically distinct from each other.

15 . The hose of claim 9 , wherein the first silane-crosslinked polyolefin elastomer and the second silane-crosslinked polyolefin elastomer have a melting temperature greater than 150° C.

16 . A method for making a hose, the method comprising:

extruding a first polyolefin having a density less than 0.86 g/cm 3 , a second polyolefin, a silane crosslinker, a radical initiator, and a condensation catalyst together to form an extruded crosslinkable polyolefin blend;

cooling the extruded crosslinkable polyolefin blend;

forming the extruded crosslinkable polyolefin blend into a hose element; and

crosslinking the blend of the hose element to form the hose,

wherein the hose exhibits a compression set of from about 5% to about 35%, as measured according to ASTM D 395 Method B (168 hrs at 150° C.), and

wherein the hose has a density from about 0.88 g/cm 3 to about 1.05 g/cm 3 .

17 . The method of claim 16 , wherein the extruding step has a temperature from about 75° C. to about 120° C.

18 . The method of claim 16 , further comprising:

adding a trimming, an overmolding, a reducer, a clamp, an alignment marker, a protective sleeve, or a combination thereof to the hose.

19 . The method of claim 16 , wherein the hose exhibits a crystallinity of from about 5% to about 25%.

20 . The method of claim 16 , wherein the hose has a glass transition temperature of from about −75° C. to about −25° C.