Catalyst system for polymerization of an olefin
Patents
| Language: |
Английский |
| Type: |
Invention |
| Number |
EP 4444769 A1 |
| Request number: |
EP22834915.5A |
| Request date: |
Dec 8, 2022 |
| patent.field.start_date: |
|
| Registration date: |
Oct 16, 2024 |
| patent.field.request_publication_date: |
|
A process for the preparation of a procatalyst suitable for preparing a catalyst composition for olefin polymerization, the procatalyst obtained or obtainable by the process; and a catalyst composition for olefin polymerization comprising the procatalyst. In particular an activator according to Formula (I) can be used in the preparation of a supported Ziegler-Natta type procatalyst useful for a process for the preparation of polyolefins.
A process for the preparation of a procatalyst for preparing a catalyst composition for an olefin polymerization comprises the following steps: (a) providing a magnesium (Mg)-based support; (b) contacting the magnesium (Mg)-based support with a Ziegler-Natta type catalytic species and at least one activator R1C(O)R2 wherein R1 is selected from a group of linear or branched chains of unsubstituted alkyl, alkenyl, aryl, aralkyl, alkoxycarbonyl, alkylaryl having 1 to 10 carbon atoms, or one or more combinations thereof;wherein R2 can be selected from hydrogen, acyl or from a group of linear or branched chains of unsubstituted alkyl, alkenyl, aryl, aralkyl, alkoxycarbonyl, alkylaryl having 1 to 10 carbon atoms, or one or more combinations thereof; and (c) adding at least one internal donor;wherein the internal donor is selected from the group comprising at least one of aminobenzoates, succinates, silyl esters, silyl diol esters, diethers, phthalates or any combinations thereof;wherein the molar ratio of the activator to Mg is from 0.1 to 1, preferably from 0.1 to 0.75, more preferably from 0.1 to 0.5.