Methods for making catalyst compositions and polymer products produced therefrom

Patent metadata

Field	Value
Publication number	US-9975974-B2
Application number	US-201615292358-A
Country	US
Kind code	B2
Filing date	Oct 13, 2016
Priority date	Mar 5, 2012
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Methods for making olefin polymerization catalysts and methods for making polymers using the catalysts are provided. The method for making the catalyst can include combining one or more supports with one or more magnesium-containing compounds under reaction conditions to form a first reacted product. One or more chlorinating compounds selected from the group consisting of aluminum alkyl chlorides and chloro substituted silanes can be combined with the first reacted product under reaction conditions to form a second reacted product. One or more titanium-containing compounds selected from the group consisting of titanium alkoxides and titanium halides can be combined with the second reacted product under reaction conditions to form a catalyst.

First claim

What is claimed is:

1. A polyethylene comprising:
a molecular weight distribution (MWD) of about 4.5 to about 6.8;
a slope of strain hardening greater than about 0.75, as measured by extensional viscosity fixture (EVF); and
a melt flow ratio (I 21 /I 2 ) greater than or equal to 8.33+(4.17×MWD).

2. The polyethylene of claim 1 , wherein the polyethylene has a long chain branching (LCB) greater than about 0.01 per 1,000 carbon atoms and less than about 0.05 per 1,000 carbon atoms.

3. The polyethylene of claim 2 , wherein the long change branching is composed of more than 6 carbon atoms.

4. The polyethylene of claim 1 , wherein the polyethylene has a comonomer homogeneity index (CHI) of less than about 0.5.

5. The polyethylene of claim 1 , wherein the polyethylene has a heterogeneous distribution of short chain branching (SCB).

6. The polyethylene of claim 1 , wherein the polyethylene has a density ranging from about 0.91 g/cm 3 to about 0.965 g/cm 3 .

7. The polyethylene of claim 1 , wherein the polyethylene has a melt index (I 2 ) ranging from about 0.05 g/10 min to about 100 g/10 min, measured according to ASTM D-1238-E (at 190° C., 2.16 kg weight).

8. The polyethylene of claim 1 , wherein the polyethylene has a flow index (I 21 ) greater than about 10 g/10 min, measured according to ASTM D-1238-F (at 190° C., 21.6 kg weight), and wherein the polyethylene has a melt index (I 2 ) less than about 100 g/10 min, measured according to ASTM D-1238-E (at 190° C., 2.16 kg weight).

9. The polyethylene of claim 1 , wherein the polyethylene has a melt flow ratio (I 21 /I 2 ) ranging from about 30 to about 45.

10. The polyethylene of claim 1 , wherein the polyethylene has a melt flow ratio (I 21 /I 2 ) ranging from about 33 to about 45.

11. The polyethylene of claim 1 , wherein the polyethylene has a density greater than or equal to 0.945 g/cm 3 and a melt strength greater than or equal to a×(3.7463×exp(−1.485×log(MI))), wherein a is equal to 1.5.

12. The polyethylene of claim 1 , wherein the polyethylene has a density greater than or equal to 0.945 g/cm 3 and a melt strength greater than or equal to a×(3.7463×exp(−1.485×log(MI))), wherein a is equal to 1.75.

13. The polyethylene of claim 1 , wherein the polyethylene has a density greater than or equal to 0.945 g/cm 3 and a melt strength greater than or equal to a×(3.7463×exp(−1.485×log(MI))), wherein a is equal to 1.9.

14. The polyethylene of claim 1 , wherein the polyethylene has a density less than or equal to 0.945 g/cm 3 and a melt strength greater than or equal to a×(3.7463×exp(−1.485×log(MI))), wherein a is equal to 1.2.

15. The polyethylene of claim 1 , wherein the polyethylene has a density less than or equal to 0.945 g/cm 3 and a melt strength greater than or equal to a×(3.7463×exp(−1.485×log(MI))), wherein a is equal to 1.5.

16. The polyethylene of claim 1 , wherein the polyethylene has a density less than or equal to 0.945 g/cm 3 and a melt strength greater than or equal to a×(3.7463×exp(−1.485×log(MI))), wherein a is equal to 1.9.

Assignees

• Univation Tech Llc

Inventors

• Mariott Wesley R
• Cann Kevin J
• Moorhouse John H
• Goode Mark G
• Oswald Thomas

Classifications

• C08F210/16 Primary

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

• C08J5/18

  Manufacture of films or sheets · CPC title

• C08F110/02

  Ethene · CPC title

• C08J2323/08

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

• C08F4/6565

  and magnesium or compounds thereof · CPC title