Ethylene-based polymers with improved melt strength and processes for the same

Patent metadata

Field	Value
Publication number	US-9388260-B2
Application number	US-201214367849-A
Country	US
Kind code	B2
Filing date	Dec 10, 2012
Priority date	Dec 22, 2011
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

The invention provides an ethylene-based polymer formed from at least the following: ethylene and a monomeric chain transfer agent (monomeric CTA) selected from Structure 1: wherein L is selected from a saturated hydrocarbon, a substituted saturated hydrocarbon, an unsaturated hydrocarbon, or a substituted unsaturated hydrocarbon; R1 is selected from hydrogen, a saturated hydrocarbon, a substituted saturated hydrocarbon, an unsaturated hydrocarbon, or a substituted unsaturated hydrocarbon; R2 is selected from hydrogen, a saturated hydrocarbon or a substituted saturated hydrocarbon; R3 is selected from hydrogen, a saturated hydrocarbon or a substituted saturated hydrocarbon; and R4 is selected from a saturated hydrocarbon, a substituted saturated hydrocarbon, an unsaturated hydrocarbon, or a substituted unsaturated hydrocarbon.

First claim

The invention claimed is:

1. An ethylene-based polymer formed from at least the following: ethylene and a monomeric chain transfer agent (monomeric CTA) selected from Structure 1:

wherein
L is selected from a saturated hydrocarbon, a substituted saturated hydrocarbon, an unsaturated hydrocarbon, or a substituted unsaturated hydrocarbon;
R1 is selected from hydrogen, a saturated hydrocarbon, a substituted saturated hydrocarbon, an unsaturated hydrocarbon, or a substituted unsaturated hydrocarbon;
R2 is selected from hydrogen, a saturated hydrocarbon or a substituted saturated hydrocarbon;
R3 is selected from hydrogen, a saturated hydrocarbon or a substituted saturated hydrocarbon; and
R4 is selected from a saturated hydrocarbon, a substituted saturated hydrocarbon, an unsaturated hydrocarbon, or a substituted unsaturated hydrocarbon.

2. The ethylene-based polymer of claim 1 , wherein L is selected from a saturated hydrocarbon or a substituted saturated hydrocarbon.

3. The ethylene-based polymer of claim 1 , wherein L is selected from the group consisting of the following:
a) —(CH 2 ) n —, where n≧2;
b) —(CH 2 CH 2 O) n —CH 2 CH 2 —, where n≧1;
c) —(CH 2 CH(CH 3 )O) n —CH 2 CH(CH 3 )—, where n≧1;
d) —(CH 2 CH(CH 2 CH 3 )O) n —CH 2 CH(CH 2 CH 3 )—, where n≧1; and
e) —CH 2 —CH(OH)—CH 2 —;
f) —CH(CH 3 )—CH 2 —;
g) —CH 2 —CH(CH 3 )—;
h) a combination of —CH(CH 3 )—CH 2 — and —CH 2 —CH(CH 3 )—;
i) —CH(CH 2 CH 3 )—CH 2 —;
j) —CH 2 —CH(CH 2 CH 3 )—; and
k) a combination of —CH(CH 2 CH 3 )—CH 2 — and —CH 2 —CH(CH 2 CH 3 )—.

4. The ethylene-based polymer of claim 1 , wherein L is an alkylene.

5. The ethylene-based polymer of claim 1 , wherein R1 is hydrogen or an alkyl group.

6. The ethylene-based polymer of claim 1 , wherein R2 is hydrogen or an alkyl group.

7. The ethylene-based polymer of claim 1 , wherein R2 is selected from C n H 2n+1 , where n≧1.

8. The ethylene-based polymer of claim 1 , wherein R3 is hydrogen or an alkyl group.

9. The ethylene-based polymer of claim 1 , wherein R3 is selected from C n H 2n+1 , where n≧1.

10. The ethylene-based polymer of claim 1 , wherein R4 is an alkyl group.

11. A composition comprising the ethylene-based polymer of claim 1 .

12. An article comprising at least one component formed from the composition of claim 11 .

13. A process to prepare the ethylene-based polymer of claim 1 , said process comprising polymerizing ethylene in the presence of the monomeric chain transfer agent of Structure 1.

14. The process of claim 13 , wherein the polymerization takes place in at least one tubular reactor.

15. The process of claim 13 , wherein the polymerization takes place at at least one pressure from 150 MPa to 350 MPa, and at at least one temperature from 100° C. to 380° C.

Assignees

• Osby John O
• Ewart Sean W
• Dow Global Technologies Llc

Inventors

• Osby John O
• Ewart Sean W

Classifications

• C08F210/02 Primary

  Ethene · CPC title

• C08F2/38

  Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation} · CPC title

• C08F2500/11

  Melt tension or melt strength · CPC title

• C08F10/02

  Ethene · CPC title

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title