Tires comprising rubber compounds that comprise propylene-α-olefin-diene polymers

A method comprising:

• producing a master batch at a first temperature, the master batch comprising:
• 5 phr to 50 phr of a propylene-α-olefin-(optional diene) PE(D)M polymer that comprises about 65 wt % to about 99.5 wt % propylene, about 0.5 wt % to about 35 wt % C2 or C4 to C16 α-olefin, and 0 wt % to about 20 wt % diene, said wt % based on the weight of the PE(D)M polymer, wherein the wt % numbers are uncorrected numbers, and wherein wt % propylene plus wt % of C2 or C4 to C16 α-olefin equals 100%, and wherein the PE(D)M polymer has a heat of fusion (Hf) of less than 1 J/g, and
• 50 parts per hundred parts rubber (phr) to 95 phr of a rubber that comprises one selected from the group consisting of the halogenated isobutylene-based rubber is selected from the group consisting of:
• natural rubber, polyisoprene rubber, poly(styrene-co-butadiene) rubber, polybutadiene rubber, poly(isoprene-co-butadiene) rubber, styrene-isoprene-butadiene rubber, butyl rubber, star branched butyl rubber, isobutylene-isoprene rubber, poly(isobutylene-co-alkylstyrene), a halogenated isobutylene-based rubber, polychloroprene rubber, nitrile rubber, and any combination thereof;
• wherein the rubber and the PE(D)M polymer cumulatively are 100 phr;
• and
• mixing a curative and/or a crosslinking agent into the master batch at a second temperature that is lower than the first temperature.

A tire that comprises:

• a rubber compound that comprises:
• 5 phr to 50 phr of a propylene-α-olefin-(optional diene) PE(D)M polymer that comprises about 65 wt % to about 99.5 wt % propylene, about 0.5 wt % to about 35 wt % C2 or C4 to C16 α-olefin, and 0 wt % to about 20 wt % diene, said wt % based on the weight of the PE(D)M polymer, wherein the wt % numbers are uncorrected numbers, and wherein wt % propylene plus wt % of C2 or C4 to C16 α-olefin equals 100%, and wherein the PE(D)M polymer has Mooney viscosity (ML(1+4) @125° C.) of about 5 MU to about 100 MU, and
• 50 parts per hundred parts rubber (phr) to 95 phr of a rubber that comprises one selected from the group consisting of the halogenated isobutylene-based rubber is selected from the group consisting of:
• natural rubber, polyisoprene rubber, poly(styrene-co-butadiene) rubber, polybutadiene rubber, poly(isoprene-co-butadiene) rubber, styrene-isoprene-butadiene rubber, butyl rubber, star branched butyl rubber, isobutylene-isoprene rubber, poly(isobutylene-co-alkylstyrene), a halogenated isobutylene-based rubber, polychloroprene rubber, nitrile rubber, and any combination thereof;
• and
• wherein the rubber and the PE(D)M polymer cumulatively are 100 phr, and
• wherein the rubber compound is included in a sidewall of the tire, an inner tube of the tire, an innerliner of the tire, or any combination thereof.