Supported olefin polymerization catalysts comprising substituted 2-hydroxythiophene compounds
AssigneeDow Global Technologies LLC
InventorsAndrew M. Camelio, Rhett A. Baillie, Matthew L. Krause
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Abstract
Disclosed are a supported catalyst system comprising a substituted 2-hydroxythiophene compound and a support material; and a method of making the supported catalyst system; Also disclosed are a gas phase or slurry phase polymerization process employing the supported catalyst system; and a polyolefin made by the gas phase or slurry phase polymerization process. Also disclosed are the substituted 2-hydroxythiophene compound and a precatalyst comprising the substituted 2-hydroxythiophene compound, a metal atom, and a leaving group. Also disclosed are methods of making the precatalyst and the substituted 2-hydroxythiophene compound.
Claims15
A substituted 2-hydroxythiophene compound of formula (I):
- or a Group 1 or Group 2 metal salt thereof, wherein:
- R1 and R2 independently are H or a halogen;
- R3 and R4 independently are H, a halogen, a (C1-C20)hydrocarbyl, a (C1-C10)alkoxy, or a Si((C1-C10)alkyl)3;
- R5 and R6 independently are H or a halogen;
- R7 and R8 independently are H or a halogen;
- and
- each R9 is H and each R10 is a (C1-C20)hydrocarbyl;
- or each R10 is H and each R9 is a (C1-C20)hydrocarbyl.
A precatalyst of formula (II):
- wherein:
- M is Ti, Hf, or Zr;
- subscript n is 1 or 2;
- and
- each X independently is selected from a monodentate ligand independently chosen from a hydrogen atom, a (C1-C50)hydrocarbyl, a (C1-C50)heterohydrocarbyl, a (C1-C50)organoheteryl, a halogen atom, a dialkylamino, or a dialkyl carbamate;
- R1 and R2 independently are H or a halogen;
- R3 and R4 independently are H, a halogen, a (C1-C20)hydrocarbyl, a (C1-C10)alkoxy, or a Si((C1-C10)alkyl)3;
- R5 and R6 independently are H or a halogen;
- R7 and R8 independently are H or a halogen;
- and
- each R9 is H and each R10 is a (C1-C20)hydrocarbyl;
- or each R10 is H and each R9 is a (C1-C20)hydrocarbyl.
Dependencies are inferred from the claim text.