Elastomeric vehicle brake parts and power transmission belts

A power transmission belt comprising an ethylene, propylene, vinyl norbornene elastomeric polymer wherein;

• a) said ethylene is present in the said elastomeric polymer in the range from about 50 to about 65 mole percent, and vinyl norbornene is present in said polymer in the range from about 0.2 to about 0.8 mole percent, said propylene is present in the range of from about 35 to about 50 mole percent, said mole percents based on the total moles of said elastomeric polymer;
• and
• b) wherein a compound made from said elastomeric polymer has:
• i) a ML 1+4 100.degree. C. up to about 50;
• ii) a MH-MI, of at least about 200 daN.m;
• iii) a cure rate of at least about 100 daN.m/min;
• iv) a 100% modulus at least about 9 MPa;
• and
• v) a compression set (22 hrs@150.degree. C.) up to about 10%.

A vehicle comprising a power transmission belt wherein;

• a) said power transmission belt include an ethylene, alpha-olefin, vinyl norbornene elastomeric polymer, wherein;
• i) said ethylene is present in said elastomeric polymer in the range of from about 50 to about 65 mole percent;
• ii) said alpha-olefin is present in said elastomeric polymer in the range of from about 35 to about 50 mole percent;
• iii) said vinyl norbornene is present in said elastomeric polymer in the range of from about 0.2 to about 0.8 mole percent;
• said mole percent based on the total moles of said elastomeric polymer;
• wherein said elastomeric polymer has a branching index in the range of from about 0.1 to about 0.7.