Solution process to make ethylene copolymers
AssigneeExxonMobil Chemical Patents Inc.
InventorsDonna J. Crowther, Hua Zhou, Jacqueline A. Lovell
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Abstract
This invention relates to a process to polymerize olefins comprising contacting, in solution phase at a temperature of 60° C. to 200° C., ethylene, and at least one olefin comonomer with a catalyst system comprising a non-coordinating anion activator and a metallocene catalyst compound, preferably represented by the formula: and 2) obtaining ethylene polymer having an Mw greater than 100,000 g/mol, preferably greater tha 400,000 g/mol.
Claims20
A process to polymerize olefins comprising contacting, in solution phase at a temperature of 85° C. to 200° C., ethylene, at least one olefin comonomer, and optional diene, with a catalyst system comprising a non-coordinating anion activator and a metallocene catalyst compound represented by the formula:
- wherein:
- M is Hf;
- each R3 is independently an anionic group;
- each R2 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- R4 is a hydrocarbyl radical having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halides, dienes, amines, phosphines, ethers, and a combination thereof;
- R* is phenyl or a substituted phenyl;
- each R5 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- each R6 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- each R7 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- each R8 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- where at least one of each adjacent pair of R7 and R8 is not H;
- and
- 2) obtaining ethylene copolymer comprising ethylene, from 0.5 to 25 mol % C3 to C20 olefin comonomer, and optionally from 0.5 to 20 mol % diene, said ethylene copolymer having a Mw greater than 100,000 g/mol where the % olefin comonomer incorporated is X % or more, where X=(Z−858,441)/(−26,760), where Z is the Mn in g/mol of the ethylene copolymer.
A process to polymerize olefins comprising contacting, in solution phase at a temperature of 85° C. to 200° C., ethylene, diene, and optionally a C3 to C20 olefin comonomer, with a catalyst system comprising a non-coordinating anion activator and a metallocene catalyst compound represented by the formula:
- wherein
- M is Hf or Zr;
- each R3 is independently an anionic group;
- each R2 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- R4 is a hydrocarbyl radical having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halides, dienes, amines, phosphines, ethers, and a combination thereof;
- R* is phenyl or a substituted phenyl;
- each R5 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- each R6 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- each R7 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- each R8 is independently H or a C1 to C20 hydrocarbyl or C1 to C20 substituted hydrocarbyl;
- where at least one of each adjacent pair of R7 and R8 is not H;
- and
- 2) obtaining an ethylene copolymer comprising from 0.5 to 20 mol % diene, optionally from 0.5 to 25 mol % C3 to C20 olefin comonomer, and said ethylene copolymer having a Mw greater than 400,000 g/mol, where a % olefin comonomer incorporated is X % or more, where X=(Z−858,441)/(−26,760), where Z is Mn in g/mol of the ethylene copolymer.
Dependencies are inferred from the claim text.