Catalyst system for olefin polymerization
Патенты
| Язык: |
Китайский |
| Тип: |
Патент на изобретение |
| Номер (11) |
CN 118369358 A |
| Номер заявки (21): |
CN202280081464.2A |
| Дата подачи заявки (22): |
8 дек. 2022 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
19 июл. 2024 г. |
| Дата публикации заявки (43): |
|
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.