Polymer compositions and methods of making and using same

Patent metadata

Field	Value
Publication number	US-9034991-B2
Application number	US-201313753289-A
Country	US
Kind code	B2
Filing date	Jan 29, 2013
Priority date	Jan 29, 2013
Publication date	May 19, 2015
Grant date	May 19, 2015

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. A polymer reactor-blend comprising at least a first component having a polydispersity index of greater than about 20 and 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 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 is encompassed by a molecular weight distribution of the first component and wherein the polymer has greater than about 75% of branching contained within the second component.

2. The reactor-blend of claim 1 formed from ethylene and a comonomer.

3. The reactor-blend of claim 1 wherein the first component has a density of greater than about 0.950 g/cc.

4. The reactor-blend of claim 3 wherein the branching can be either short-chain branching, long-chain branching or both.

5. The reactor-blend of claim 3 wherein the comonomer comprises 1-butene, 1-hexene, 1-octene, or combinations thereof.

6. The reactor-blend of claim 1 wherein the branching comprises short-chain branching.

7. The reactor-blend of claim 6 wherein the short-chain branching is greater than about 0.1 SCB per 1000 carbons.

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

9. The reactor-blend of claim 1 having a molecular weight distribution of from about 4 to about 200.

10. The reactor-blend of claim 1 having a CY-a value of from about 0.05 to about 0.8.

11. The reactor-blend of claim 10 having a short-chain branching content of from about 1 to about 20 SCB per 1000 carbons.

12. The reactor-blend of claim 7 having a tensile draw ratio of less than about 600%.

13. The reactor-blend of claim 7 having a PENT failure time of greater than 800 h determined in accordance with ASTM F1473 using a 3.8 MPa stress.

14. The reactor-blend of claim 1 having a short-chain branching distribution described by a Pearson VII Amp curve fit.

Assignees

• Chevron Phillips Chemical Co

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

• C08F2500/05

  Bimodal or multimodal molecular weight distribution · CPC title

• C08F4/65927

  two cyclopentadienyl rings being mutually bridged · CPC title

• C08F2500/17

  Viscosity · CPC title