Ziegler-Natta catalysts for olefin polymerization
AssigneeBorealis AG
InventorsGeorgy Kipiani, Marja Mustonen
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Abstract
The present invention relates to substituted 2-iso-propyl-1,3-dialkoxypropanes, and more particularly to their use as internal donors in Ziegler-Natta catalysts to obtain ethylene (co)polymers with desirable properties. The present disclosure further concerns use of Ziegler-Natta catalyst components comprising said substituted 2-iso-propyl-1,3-dimethoxypropanes and use of Ziegler-Natta catalysts in ethylene (co)polymerization comprising said Ziegler-Natta catalyst components.
Claims13
A Ziegler-Natta catalyst component comprising an internal donor selected from compounds of formula (I)
- wherein
- R1 is nonyl;
- and
- R2 and R3 are each independently C1-3-alkyl.
A method of ethylene (co) polymerization optionally with C3-20 comonomers, comprising:
- a) introducing into a polymerization reactor a Ziegler-Natta catalyst component comprising an internal donor of formula (I)
- wherein
- R1 is nonyl;
- and
- R2 and R3 are each independently linear or branched C1-3-alkyl.
A process for producing an ethylene homo- or copolymer, comprising:
- (P-a) introducing a Ziegler-Natta catalyst component, comprising:
- (i) an internal donor selected from compounds of formula (I), or from formulas (I-a) and (I-b)
- wherein
- R1 is nonyl;
- and
- R2 and R3 are each independently linear or branched C1-3-alkyl;
- (ii) a transition metal compound of Group 4 to 6 of the Periodic Table (IUPAC, Nomenclature of Inorganic Chemistry, 2005);
- (iii) a metal compound of Group 1 to 3 of the Periodic Table (IUPAC, 2005);
- and
- (iv) optionally, a compound of group 13 of the Periodic Table (IUPAC, 2005)
- into a polymerisation reactor,
- (P-b) introducing a cocatalyst that activates the Ziegler-Natta catalyst component into the polymerisation reactor;
- (P-c) introducing ethylene, optionally C3-C20 α-olefin comonomers, and optionally hydrogen into the polymerisation reactor;
- and
- (P-d) maintaining said polymerisation reactor in such conditions as to produce an ethylene homo- or copolymer.
Dependencies are inferred from the claim text.