Patent ID: 11919981
Assignee: EXXONMOBIL CHEMICAL PATENTS INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 16:
17. A process for the production of an ethylene alpha-olefin copolymer comprising: polymerizing ethylene and at least one C3-C20 alpha-olefin by introducing the ethylene and the at least one C3-C20 alpha-olefin to a catalyst system in at least one polymerization reactor at a reactor pressure of from 2 MPa to 200 MPa and a reactor temperature of from 10° C. to 250° C. to form an ethylene alpha-olefin copolymer, wherein the catalyst system comprises:
an activator;
an optional support; and
a catalyst compound represented by Formula I(a) or I(b):, , wherein:
M of Formula I(a) or I(b) is Ti, Zr, or Hf;
R1 is independently selected from the group consisting of a hydrocarbyl group and a silyl group;
R2, R3, R4, R5, R6, R7, R8, R9, and R10 are independently selected from the group consisting of hydrogen, hydrocarbyl, alkoxy, silyl, amino, aryloxy, halogen and phosphino, wherein any two adjacent R groups may be joined to form a saturated or unsaturated hydrocarbyl ring or heterocyclic ring, wherein the ring has 5, 6, 7, or 8 ring atoms and wherein substitutions on the ring can join to form additional rings; and
each X1 and X2 is independently an anionic leaving group and X1 and X2 may be joined together to form a dianionic group.