Ethylene-based copolymer and propylene-alpha-olefin-diene compositions for use in layered articles

A method comprising:

• producing a master batch at a first temperature, the master batch comprising, per 100 parts by weight of rubber (phr):
• from 5 to 80 phr of a propylene-α-olefin-diene (PEDM) terpolymer comprising 90 wt % to 97.5 wt % propylene, 2.5 wt % to 20 wt % α-olefin, and 0.5 wt % to 10 wt % diene, said wt % based on the weight of the PEDM terpolymer, wherein the wt % numbers are uncorrected numbers and the wt % propylene plus the wt % α-olefin equals 100%, and wherein the PEDM terpolymer has (a) Mooney viscosity (ML(1+4)@125° C.) of 1 to 60, (b) melt flow rate of 0.5 g/min to 100 g/min, (c) a weight average molecular weight to n-average molecular weight (Mw/Mn) ratio of 1.5 to 3.0, and (d) a heat of fusion of less than 1 J/g;
• from 25 to 95 phr of an ethylene-based copolymer comprising 40 wt % to 95 wt % ethylene, 0 wt % to 10 wt % of one or more dienes, and 5 wt % to 60 wt % C3 to C12 α-olefin, said wt % based on the total weight of the ethylene-based copolymer, wherein the wt % numbers are uncorrected numbers and the wt % ethylene plus the wt % of C3 to C12 α-olefin equals 100%;
• and
• an additive selected from the group consisting of:
• a filler, a process oil, a plasticizer, a compatibilizer, a crosslinker, and any combination thereof;
• 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 method comprising:

• mixing in a first pass an ethylene-based copolymer and an additive until the additive is incorporated, wherein the ethylene-based copolymer comprises 40 wt % to 95 wt % ethylene, 0 wt % to 10 wt % of one or more dienes, and 5 wt % to 60 wt % C3 to C12 α-olefin, said wt % based on the total weight of the ethylene-based copolymer, and wherein the additive selected from the group consisting of:
• a filler, a process oil, a plasticizer, a compatibilizer, a crosslinker, and any combination thereof;
• and
• mixing in a second pass a propylene-α-olefin-diene (PEDM) terpolymer with a curative and/or a crosslinking agent into a product of the first pass, wherein the PEDM terpolymer comprising 90 wt % to 97.5 wt % propylene, 2.5 wt % to 20 wt % α-olefin, and 0.5 wt % to 10 wt % diene, said wt % based on the weight of the PEDM terpolymer, and wherein the PEDM terpolymer has (a) Mooney viscosity (ML(1+4)@125° C.) of 1 to 60, (b) melt flow rate of 0.5 g/min to 100 g/min, (c) a weight average molecular weight to n-average molecular weight (Mw/Mn) ratio of 1.5 to 3.0, and (d) a heat of fusion of less than 1 J/g, and wherein the PEDM terpolymer is at 5 to 40 parts by weight per hundred parts by weight rubber (phr) and the ethylene-based copolymer is at 60 to 95 phr.