Ziegler-Natta—metallocene dual catalyst systems with activator-supports

Patent metadata

Field	Value
Publication number	US-10927201-B2
Application number	US-201916554784-A
Country	US
Kind code	B2
Filing date	Aug 29, 2019
Priority date	Jul 8, 2015
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

Catalyst systems having both a metallocene catalyst component and a Ziegler-Natta component are disclosed. Such catalyst systems can contain a metallocene compound, an activator-support, an organoaluminum compound, and a Ziegler-Natta component comprising titanium supported on magnesium chloride.

First claim

We claim:

1. An ethylene copolymer characterized by:
a melt index of less than or equal to about 2 g/10 min;
a high load melt index in a range from about 4 to about 30 g/10 min;
a density in a range from about 0.90 g/cm 3 to about 0.935 g/cm 3 ;
a Mw in a range from about 100,000 to about 300,000 g/mol; and
a ratio of Mw/Mn in a range from about 2.5 to about 8;

and having the following polymer fractions in an ATREF test:
less than about 4 wt. % of the polymer eluted below a temperature of 40° C.;
from about 40 to about 62 wt. % of the polymer eluted between 40 and 76° C.; and
from about 2 to about 21 wt. % of the polymer eluted between 76 and 86° C.

2. An article of manufacture comprising the copolymer of claim 1 .

3. The copolymer of claim 1 , wherein the copolymer has a Mz in a range from about 300,000 to about 1,000,000 g/mol.

4. The copolymer of claim 1 , wherein the copolymer has a Mn in a range from about 20,000 to about 50,000 g/mol.

5. The copolymer of claim 1 , wherein the copolymer has a ratio of Mz/Mw in a range from about 2 to about 5.

6. The copolymer of claim 1 , wherein:
the melt index is from about 0.5 to about 1.5 g/10 min;
the density is in a range from about 0.91 g/cm 3 to about 0.925 g/cm 3 ;
the Mw is in a range from about 120,000 to about 260,000 g/mol; and
the ratio of Mw/Mn is in a range from about 2.5 to about 7.

7. An article of manufacture comprising the copolymer of claim 6 .

8. The copolymer of claim 6 , wherein from about 0.5 to about 4 wt. % of the polymer is eluted below a temperature of 40° C.

9. The copolymer of claim 8 , wherein from about 29 to about 40 wt. % of the polymer is eluted above a temperature of 86° C.

10. The copolymer of claim 6 , wherein the ethylene copolymer comprises an ethylene/1-butene copolymer, an ethylene/1-hexene copolymer, or an ethylene/1-octene copolymer.

11. The copolymer of claim 10 , wherein the high load melt index is in a range from about 5 to about 25 g/10 min.

12. The copolymer of claim 11 , wherein the copolymer has less than about 0.008 long chain branches per 1000 total carbon atoms.

13. The copolymer of claim 1 , wherein:
the ethylene copolymer comprises an ethylene/1-butene copolymer, an ethylene/1-hexene copolymer, or an ethylene/1-octene copolymer; and
the Mw is in a range from about 120,000 to about 260,000 g/mol.

14. The copolymer of claim 13 , wherein:
the melt index is from about 0.5 to about 1.5 g/10 min;
the density is in a range from about 0.91 g/cm 3 to about 0.925 g/cm 3 ; and
the ratio of Mw/Mn is in a range from about 3 to about 8.

15. An article of manufacture comprising the copolymer of claim 14 .

16. The copolymer of claim 14 , wherein the copolymer has:
a Mz in a range from about 300,000 to about 1,000,000 g/mol; and
a Mn in a range from about 20,000 to about 50,000 g/mol.

17. The copolymer of claim 14 , wherein the copolymer has a ratio of Mz/Mw in a range from about 2 to about 5.

18. The copolymer of claim 14 , wherein the high load melt index is in a range from about 5 to about 25 g/10 min.

19. An article of manufacture comprising the copolymer of claim 18 .

20. The copolymer of claim 18 , wherein the copolymer has a ratio of Mz/Mw in a range from about 2 to about 5.

Assignees

• Chevron Phillips Chemical Co Lp

Inventors

• Ding Errun
• Tso Chung C
• Yu Youlu
• Yang Qing
• Buck Richard M

Classifications

• C08F210/16 Primary

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

• C08F2410/07

  Catalyst support treated by an anion, e.g. Cl-, F-, SO42- · CPC title

• C08F2/01

  characterised by special features of the polymerisation apparatus used · CPC title

• C08F4/6592

  containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring · CPC title

• C08F4/65916

  supported on a carrier, e.g. silica, MgCl2, polymer · CPC title