CATALYST SYSTEM FOR POLYMERIZATION OF AN OLEFIN
First Claim
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1. A process for the preparation of a procatalyst for preparing a catalyst composition for olefin polymerization, said process comprising:
- providing a magnesium-based support, contacting said magnesium-based support with a Ziegler-Natta type catalytic species, an internal donor, and an activator, to yield a procatalyst, wherein the activator is a benzamide according to formula X;
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Abstract
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 a benzamide can be used as an activator in the preparation of a supported Ziegler-Natta type procatalyst useful for a process for the preparation of polyolefins. The Polyolefins and polypropylene homopolymers are also disclosed.
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Citations
20 Claims
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1. A process for the preparation of a procatalyst for preparing a catalyst composition for olefin polymerization, said process comprising:
providing a magnesium-based support, contacting said magnesium-based support with a Ziegler-Natta type catalytic species, an internal donor, and an activator, to yield a procatalyst, wherein the activator is a benzamide according to formula X; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 16, 17, 18, 19)
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10. A catalyst composition for olefin polymerization comprising a procatalyst comprising
a benzamide according to formula X,
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11. The catalyst composition of claim wherein the catalyst is a supported Ziegler-Natta catalyst.
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15. A polypropylene homopolymer prepared by a slurry polymerization using a solvent, having:
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a molecular weight distribution (Mw/Mn) below 5.0, wherein Mw and Mn are determined according to ASTM D6474-12; a melt flow rate of above 14, wherein the melt flow rate is as measured according to ISO 1133;
2005, at 230°
C. under a load of 2.16 kg;a weight percentage of atactic polypropylene (APP) of less than 1.5, wherein the APP is measured according to the following procedure;
a quantity A of the product stream from said slurry polymerization process is collected;
this quantity A is filtered using a filter having pores between 10 and 16 μ
m in diameter, to obtain a filtrate Y and a polymer quantity of weight x, said polymer quantity of weight x being the quantity of material that remained on the filter;
said filtrate Y is dried over a steam bath and then under vacuum at 60°
C. to obtain a dry mass of APP of weight z;
the weight percentage of APP is calculated by; - View Dependent Claims (20)
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Specification