Methods of controlling ziegler-natta pre-catalyst particles formation and use for olefin polymerization
US11332557B2 · kind B2 · utility
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Key dates
| Filing date | Jun 18, 2020 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Aug 29, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/61
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A colloidal suspension includes an organic phase and a complex of Formula I as precursor for Ziegler-Natta catalyst synthesis: XTiClp(OR1)4-p.YMg(OR2)q(OR3)t (I). In Formula I, a molar ratio of X to Y (X/Y) is from 0.2 to 5.0, p is 0 or 1, 0<q<2, 0<t<2, the sum of q and t is 2, R1, R2, and R3 are each independently a linear or branched alkyl, a linear or branched heteroalkyl, a cycloalkyl, a substituted cycloalkyl, a substituted heterocycloalkyl, a substituted aryl, or a (heteroaryl)alkyl; and R2 is not the same as R3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.