Patent ID: 8378048

Claim:
An amorphous ethylene propylene copolymer, comprising: from about 40 wt % to about 60 wt % of ethylene derived units; and from about 60 wt % to about 40 wt % of propylene derived units, wherein the copolymer is characterized by having: no discernible melting point as measured by DSC; an MFRR (MI (21.6 kg; 230° C.)/MI (2.16 kg; 230° C.)) of about 38 or more; a molecular weight distribution (MWD) of from about 1.5 to about 2.5; and a shear viscosity η* at 0.01 rad/sec measured at 70° C. that satisfies the relation |η*| (70° C.; 0.01 rad/sec) >1.2*10 6 *|MFR| −0.77 , wherein MFR is the melt flow rate.