Processes for producing high propylene content PEDM having low glass transition temperatures using tetrahydroindacenyl catalyst systems

A method for producing an olefin polymer comprising:

• contacting C3-C40 olefin, ethylene, and diene with a catalyst system comprising activator and a catalyst compound represented by formula (I):
• TyCp′mMGnXq (I)
• wherein:
• Cp′ is a tetrahydro-s-indacenyl group which is optionally substituted or unsubstituted, provided that when Cp′ is tetrahydro-s-indacenyl:
• 1) the 3 and/or 4 positions are not aryl or substituted aryl, 2) the 3 position is not directly bonded to a group 15 or 16 heteroatom, 3) there are no additional rings fused to the tetrahydroindacenyl ligand, 4) T is not bonded to the 2-position, and 5) the 5, 6, or 7-position is geminally disubstituted;
• M is a group 3, 4, 5, or 6 transition metal;
• T is a bridging group;
• y is 0 or 1, indicating the absence or presence of T;
• G is a heteroatom group represented by the formula JRiz-y where J is N, P, O or S,
• Ri is a C1 to C100 hydrocarbyl group, and z is 2 when J is N or P, and z is 1 when J is O or S;
• X is a leaving group;
• m=1;
• n=1, 2 or 3;
• q=1, 2 or 3;
• and the sum of m+n+q is equal to the oxidation state of the transition metal;
• and
• obtaining a C3-C40 olefin-ethylene-diene terpolymer comprising from 30 to 55 mol % of ethylene, from 70 to 55 mol % C3-C40 olefin, and from 0.01 to 7 mol % diene, and wherein the Tg of the terpolymer is −28° C. or lower, and the terpolymer produced has a Tg (° C.) greater than or equal to −6.886−(87.98*E)+294*D) and less than or equal to −1.886−(87.98*E)+(294*D) and E is the mole fraction of ethylene in the polymer and D is the mole fraction of diene in the terpolymer.