Ziegler-Natta catalyst for high temperature polymerization

Patent metadata

Field	Value
Publication number	US-10442880-B2
Application number	US-201715850101-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Aug 12, 2014
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.

First claim

What is claimed is:

1. A procatalyst for polymerization of ethylene and α-olefins, the procatalyst comprising at least 0.2% of a species detectable by EPR having a g value of 1.950 that is associated with a tetrahedral Ti 3+ species.

2. The procatalyst of claim 1 , comprising from about 0.2 to about 1% of a species detectable by EPR having a g value of 1.950 that is associated with a tetrahedral Ti 3+ species.

3. The procatalyst of claim 1 , wherein the procatalyst for polymerization of ethylene and α-olefins comprises a Ti 3+ complex of the formula TiCl 3 *[[R 4 ] a [R 5 O] b AlX 3-c ] d wherein
a is 0 to 1;
b is 0 to 1;
c=a+b;
d is from about 0.33 to about 1.0;
each R 4 and R 5 is independently selected from C 1-8 alkyl radicals;
each X is independently chosen from the halogen radicals;
the Mg/Ti molar ratio is from about 5 to about 10;
and further wherein at least 60% of the total Ti present is in the Ti 3+ oxidation state.

4. The procatalyst of claim 3 , wherein X is Cl.

5. The procatalyst of claim 3 , wherein a is 0 and b is 0.

6. The procatalyst of claim 3 , wherein a is 0 and b is 1.

7. The procatalyst of claim 3 , wherein a is 1 and b is 0.

8. The procatalyst of claim 3 , wherein each R 5 is ethyl.

9. The procatalyst of claim 3 , wherein the Mg/Ti ratio is from about 5 to about 8.

10. The procatalyst of claim 3 , wherein the Ti 3+ complex is TiCl 3 *[OEtAlCl 2 ] d , and the Mg/Ti molar ratio is from about 5 to about 8.

11. The procatalyst of claim 3 , wherein the Ti 3+ complex is TiCl 3 *[ClAlCl 2 ] d , and the Mg/Ti molar ratio is from about 5 to about 8.

Assignees

• Nova Chem Int Sa

Inventors

• Wang Qinyan
• Ouskine Helena
• Aiffa Mohamed
• Baltimore Amy
• Severin Holly
• Dewit Perry
• Clemens Steven
• Van Asseldonk Lawrence Martin Josef
• Jaber Isam

Classifications

• C08J2323/08

  Copolymers of ethene (C08J2323/16 takes precedence) · CPC title

• C08J5/00

  Manufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes B01D67/00 - B01D71/00) · CPC title

• C08F210/16 Primary

  Copolymers of ethene with alpha-alkenes, e.g. EP rubbers · CPC title

• C08F10/02 Primary

  Ethene · CPC title

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title