Pressure sensitive adhesives comprising propylene-ethylene(-diene) copolymers

A pressure-sensitive adhesive comprising:

• about 18 wt % to about 90 wt % of a propylene-ethylene (-diene) (PEDM) copolymer comprising (a) about 60 wt % to about 99 wt % propylene, (b) about 1 wt % to about 40 wt % ethylene or a C4 to C22 alpha-olefin, and (c) about 0.5 wt % to about 5 wt % diene, wherein the PEDM copolymer has a heat of fusion of about 15 J/g or less;
• about 10 wt % to about 65 wt % of a tackifier;
• and about 5 wt % to about 40 wt % of an oil, wherein the wt % propylene, the wt % ethylene, and the wt % C4 to C22 alpha-olefin are uncorrected wt % numbers, which is based on total weight of propylene, ethylene, and C4 to C22 alpha olefin in the PEDM copolymer, and wherein the wt % diene is a corrected wt % number, which is based on total weight of propylene, ethylene, C4 to C22 alpha-olefin, and diene in the PEDM copolymer.