Catalysts
AssigneesOxford University Innovation Limited, SCG Chemicals Public Company Limited
InventorsDermot O'HARE, Jean-Charles BUFFET, Zoe TURNER, Clement COLLINS RICE
Life of this patent
Estimating the term…
Abstract
Compounds suitable for use in the polymerisation of olefins, such as ethylene, are described. Also described is a process for polymerising olefins using the described compounds. The compounds exhibit high polymerisation activities and afford polyolefins having industrially desirable properties, including high molecular weight and low polydispersity.
Claims25
A compound having a structure according to Formula I shown below:
- wherein
- R1 and R2 are each independently selected from the group consisting of hydrogen, (1-6C)alkyl, (1-6C)haloalkyl, (1-6C)alkoxy, (2-6C)alkenyl, (2-6C)alkynyl, —NR3R4 and —(O)n—(CR5R6)m—R7, where n is 0 or 1, m is 0 or 1, R3 and R4 are independently selected from hydrogen and (1-3C)alkyl, R5 and R6 are each independently hydrogen or (1-2C)alkyl, and R7 is selected from the group consisting of aryl, heteroaryl, carbocyclyl and heterocyclyl, and where each R7 is independently optionally substituted with one or more groups R3 selected from the group consisting of halo, hydroxy, (1-4C)alkyl, (1-4C)haloalkyl and (1-3C)alkoxy;
- Ra and Rb are each independently selected from (1-4C)alkyl, (2-4C)alkenyl and aryl;
- each Y is independently selected from the group consisting of hydride, halo, (1-5C)alkyl, (1-5C)alkoxy, —(CH2)pSi(R9)3, —NR10R11, and —(O)q—(CR12R13)r—R14, where p is 1 or 2, q is 0 or 1, r is 0 or 1, each R9 is independently (1-3C)alkyl, R10 and R11 are independently selected from hydrogen and (1-3C)alkyl, R12 and R13 are independently selected from hydrogen and (1-2C)alkyl, and R14 is selected from the group consisting of aryl, heteroaryl, carbocyclyl and heterocyclyl, and where each R14 is independently optionally substituted with one or more groups R15 selected from the group consisting of halo, hydroxy, (1-4C)alkyl, (1-4C)haloalkyl and (1-3C)alkoxy.
The compound of any one of the preceding claims, wherein R8 is selected from the group consisting of halo and (1-3C)alkyl.
The compound of any one of the preceding claims, wherein Ra and Rb are methyl.
The compound of any one of the preceding claims, wherein each Y is independently selected from the group consisting of hydride, chloro, bromo, iodo, (1-3C)alkyl, (1-3C)alkoxy, —(CH2)pSi(R9)3, —NR10R11, and —(O)q—(CR12R13)r—R14.
The compound of any one of the preceding claims, wherein p is 1 and R9 is methyl, R10 and R11 are independently selected from (1-3C)alkyl, and R12 and R13 are hydrogen.
The compound of any one of the preceding claims, wherein R14 is selected from the group consisting of phenyl and 5-6 membered heteroaryl, wherein said 5-6 membered heteroaryl contains 1 or 2 nitrogen heteroatoms.
The compound of any one of the preceding claims, wherein R15 is selected from the group consisting of (1-4C)alkyl.
The compound of any one of the preceding claims, wherein each Y is independently selected from the group consisting of chloro, bromo, iodo, methyl, —CH2Si(CH3)3, —N(CH3)2 and —O-2,6-diisopropylphenyl.
The compound of any one of the preceding claims, wherein Y is chloro.
The compound of any one of the preceding claims, wherein the compound has a structure according to Formula I-A shown below:
- wherein R1, R2 and Y are as defined in any one of the preceding claims.
The compound of any one of the preceding claims, wherein the compound is supported on a supporting substrate selected from the group consisting of silica, layered double hydroxide, silica-supported methylaluminoxane, layered double hydroxide-supported methylaluminoxane and solid polymethylaluminoxane.
Dependencies are inferred from the claim text.