Cyclopentadienyl/adamantyl phosphinimine zirconium and hafnium complexes
US-2023235100-A1 · Jul 27, 2023 · US
Bis-phosphinimide catalysts for olefin polymerization
US12146012B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12146012-B2 |
| Application number | US-202017601668-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 31, 2020 |
| Priority date | Apr 8, 2019 |
| Publication date | Nov 19, 2024 |
| Grant date | Nov 19, 2024 |
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Abstract
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A phosphinimide catalyst system comprises: i) a phosphinimide pre-polymerization catalyst having two phosphinimide ligands, at least one of which is substituted by a phosphinimide moiety; and ii) a catalyst activator. The catalyst system polymerizes ethylene with an alpha-olefin to give high molecular weight ethylene copolymer.
First claim
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The invention claimed is: 1. A phosphinimide pre-polymerization catalyst having the following structure: wherein P is phosphorus; N is nitrogen; each X is independently an activatable ligand; R 1 is independently selected from a hydrogen atom, a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom, an alkoxy group, an aryl group, an aryloxy group, an amido group, a silyl group, and a germanyl group; R 2 is independently a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom; a is 1, 2 or 3; b is 2, 1, or 0; a+b=3; c is 0, 1, 2 or 3; d is 3, 2, 1 or 0; and c+d=3. 2. The phosphinimide pre-polymerization catalyst of claim 1 , wherein R 1 is independently a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom. 3. The phosphinimide pre-polymerization catalyst of claim 2 , wherein R 1 is a tert-butyl group. 4. The phosphinimide pre-polymerization catalyst of claim 1 , wherein R 2 is a tert-butyl group. 5. The phosphinimide pre-polymerization catalyst of claim 1 , wherein each X is methide. 6. A polymerization catalyst system comprising: i) a phosphinimide pre-polymerization catalyst having the following structure: wherein P is phosphorus; N is nitrogen; each X is independently an activatable ligand; R 1 is independently selected from a hydrogen atom, a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom, an alkoxy group, an aryl group, an aryloxy group, an amido group, a silyl group, and a germanyl group; R 2 is independently a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom; a is 1, 2 or 3; b is 2, 1, or 0; a+b=3; c is 0, 1, 2 or 3; d is 3, 2, 1 or 0; and c+d=3; and ii) a catalyst activator. 7. A polymerization process comprising polymerizing ethylene optionally with one or more C 3-12 alpha olefins in the presence of a polymerization catalyst system comprising: i) a phosphinimide pre-polymerization catalyst having the following structure: wherein P is phosphorus; N is nitrogen; each X is independently an activatable ligand; R 1 is independently selected from a hydrogen atom, a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom, an alkoxy group, an aryl group, an aryloxy group, an amido group, a silyl group, and a germanyl group; R 2 is independently a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom; a is 1, 2 or 3; b is 2, 1, or 0; a+b=3; c is 0, 1, 2 or 3; d is 3, 2, 1 or 0; and c+d=3; and ii) a catalyst activator. 8. The polymerization process of claim 7 , wherein the polymerization process is a solution phase polymerization process carried out in a solvent. 9. The polymerization process of claim 8 , wherein the process comprises polymerizing ethylene with one or more C 3-12 alpha olefins. 10. The polymerization process of claim 9 , wherein the process comprises polymerizing ethylene with 1-octene.
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Classifications
Phosphoranes containing the structure P=N- · CPC title
using catalysts, e.g. selective catalysts · CPC title
Cp or analog not bridged to a non-Cp X ancillary anionic donor · CPC title
- C08F210/16Primary
Copolymers of ethene with alpha-alkenes, e.g. EP rubbers · CPC title
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- What does patent US12146012B2 cover?
- A phosphinimide catalyst system comprises: i) a phosphinimide pre-polymerization catalyst having two phosphinimide ligands, at least one of which is substituted by a phosphinimide moiety; and ii) a catalyst activator. The catalyst system polymerizes ethylene with an alpha-olefin to give high molecular weight ethylene copolymer.
- Who is the assignee on this patent?
- Nova Chem Int Sa
- What technology area does this patent fall under?
- Primary CPC classification C08F210/16. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 19 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).