Monocyclopentadienyl pyridyl hydroxyl amine catalyst compounds and systems for olefin polymerization
AssigneeExxonMobil Chemical Patents Inc.
InventorsAlex E. Carpenter, Danielle G. Singleton
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Abstract
This invention relates to mono cyclopentadienyl pyridyl hydroxyl amine catalyst compounds represented by Formula I(a) or I(b): wherein: M is a group 3-12 metal; R1 is a hydrocarbyl group or 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 single or multicyclic hydrocarbyl ring or heterocyclic ring; and each X1 and X2 is independently an anionic leaving group or X1 and X2 may be joined together to form a dianionic group.
Claims19
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.
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.
Dependencies are inferred from the claim text.