Catalyst system for olefin polymerization
Patents
| Language: |
Китайский |
| Type: |
Invention |
| Number |
CN 118369358 A |
| Request number: |
CN202280081464.2A |
| Request date: |
Dec 8, 2022 |
| patent.field.start_date: |
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| Registration date: |
Jul 19, 2024 |
| patent.field.request_publication_date: |
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Disclosed is a process for preparing a procatalyst suitable for preparing a catalyst composition for olefin polymerization, a procatalyst obtainable or obtainable by said process; and a catalyst composition for olefin polymerization comprising the main catalyst. In particular, the activators according to formula (I) are useful for preparing supported Ziegler-Natta procatalysts for use in processes for preparing 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.