Polymer compositions and methods of making and using same

Patent metadata

Field	Value
Publication number	US-9637573-B2
Application number	US-201615051173-A
Country	US
Kind code	B2
Filing date	Feb 23, 2016
Priority date	Jan 29, 2013
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A polymer reactor-blend comprising at least a first component having a polydispersity index of greater than about 20 and is present in an amount of from about 1 wt. % to about 99 wt. % based on the total weight of the polymer and a second component having a polydispersity index of less than about 20 and is present in an amount of from about 1 wt. % to about 99 wt. % based on the total weight of the polymer wherein a molecular weight distribution of the second component lies within a molecular weight distribution of the first component.

First claim

What is claimed is:

1. An extruded polymer reactor-blend having a density of greater than about 0.95 g/ml and a tensile natural draw ratio of from about 540% to about 600% wherein the reactor-blend comprises at least a first component and a second component and wherein one of the components has a molecular weight distribution of greater than about 20.

2. The blend of claim 1 having a tensile natural draw ratio of less than about 580%.

3. The blend of claim 1 wherein the polymer comprises ethylene and a comonomer.

4. The blend of claim 1 wherein the comonomer comprises 1-butene, 1-hexene, 1-octene, or combinations thereof.

5. The blend of claim 1 having a weight average molecular weight of from about 50 kg/mol to about 1000 kg/mol.

6. The blend of claim 1 having a polydispersity index of greater than about 15.

7. The blend of claim 1 wherein the reactor blend was prepared using a catalyst system comprising at least one imine (bis)phenolate transition metal complex and a chemically treated solid oxide.

8. A pipe fabricated from the blend of claim 1 having a PE-100 designation or greater.

9. An extruded polymer reactor-blend having a density of equal to or less than about 0.95 g/ml and a PENT failure time of greater than about 800 h determined in accordance with ASTM F1473 using a 3.8 MPa stress wherein the polyethylene reactor-blend was prepared using a catalyst system comprising at least one imine (bis)phenolate transition metal complex, wherein the reactor-blend comprises at least a first component and a second component and wherein one of the components has a molecular weight distribution of greater than about 20.

10. The blend of claim 9 having a PENT failure time of greater than about 1500 h determined in accordance with ASTM F1473 using a 3.8 MPa stress.

11. The blend of claim 9 wherein the polymer comprises ethylene and a comonomer.

12. A polyethylene reactor-blend having a density of equal to or less than about 0.95 g/ml and a tensile natural draw ratio of from about 540% to about 600% wherein the polyethylene reactor-blend was prepared using a catalyst system comprising at least one imine (bis)phenolate transition metal complex, wherein the reactor-blend comp rises at least a first component and a second component and wherein one of the components has a molecular weight distribution of greater than about 20.

13. The blend of claim 12 wherein the transition metal comprises Ti, Zr, or Hf.

14. The blend of claim 12 having a tensile natural draw ratio of less than about 580%.

15. The blend of claim 12 having a PENT failure time of greater than 800 h determined in accordance with ASTM F1473 using a 3.8 MPa stress.

16. The blend of claim 12 having a PENT failure time of greater than 1500 h determined in accordance with ASTM F1473 using a 3.8 MPa stress.

17. The blend of claim 12 further comprising a comonomer.

18. The blend of claim 17 wherein the comonomer comprises 1-butene, 1-hexene, 1-octene, or combinations thereof.

19. The blend of claim 12 having a weight average molecular weight of from about 50 kg/mol to about 1000 kg/mol.

20. The blend of claim 12 having a polydispersity index of greater than about 15.

Assignees

• Chevron Phillips Chemical Co Lp

Inventors

• Hlavinka Mark L
• Yang Qing
• Beaulieu William B
• Deslauriers Paul J

Classifications

• C08F210/16 Primary

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

• C08F4/65912

  in combination with an organoaluminium compound · CPC title

• C08F2500/07

  High density, i.e. > 0.95 g/cm3 · CPC title

• C08F10/14 Primary

  Monomers containing five or more carbon atoms · CPC title

• F16L9/127

  the walls consisting of a single layer · CPC title