Ethylene-based polymers and processes to make the same

Patent metadata

Field	Value
Publication number	US-9303107-B2
Application number	US-201414578654-A
Country	US
Kind code	B2
Filing date	Dec 22, 2014
Priority date	Sep 28, 2012
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

An ethylene-based polymer, which is a low density polyethylene (LDPE), obtained by free radical polymerization of ethylene, and wherein the LDPE has a GPC parameter “LSP” less than 1.60.
An ethylene-based polymer that comprises the following features:
a) at least 0.1 amyl groups per 1000 total carbon atoms;
b) a melt index of 0.01 to 0.3; c) a z-average molecular weight of Mz (conv.) of greater than 350,000 g/mol and less than 425,000 g/mol;
d) a gpcBR value from 1.50 to 2.05, and e) a MWD(conv) [Mw(conv)/Mn(conv)] from 6 to 9.

An ethylene-based polymer that comprises the following features:
a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt viscosity ratio (V0.1/V100), at 190° C., greater than, or equal to, 58; c) a melt viscosity at 0.1 rad/s, 190° C., greater than, or equal to, 40,000 Pa·s, and d) a gpcBR value from 1.50 to 2.25.

First claim

The invention claimed is:

1. A composition comprising an ethylene-based polymer that comprises the following features:
a) at least 0.1 amyl groups per 1000 total carbon atoms;
b) a melt index of 0.01 to 0.3;
c) a z-average molecular weight of Mz (cony) of greater than 350,000 g/mol and less than 425,000 g/mol;
d) a gpcBR value from 1.50 to 2.05, and
e) a MWD(conv) [Mw(conv)/Mn(conv)]from 6 to 9.

2. The composition of claim 1 , wherein the ethylene-based polymer has a GPC-Light Scattering parameter “LSP” less than 2.0.

3. The composition of- claim 1 , wherein the polymer has a melt strength greater than 15cN and less than 25 cN.

4. The composition of claim 1 , wherein the polymer has a MWD(conv) from 5 to 8.

5. The composition of claim 1 , wherein the polymer has a melt index (12) from 0.01 to 1 g/10 min.

6. The composition of claim 1 , wherein the polymer has a density from 0.910 to 0.940 g/cc.

7. The composition of claim 1 , wherein the polymer has a melt strength of at least 15 cN and less than 21 cN, and a velocity at break of greater than 40 mm/s.

8. The composition of claim 1 , wherein the polymer has a viscosity ratio (V0.1/V100, at 190° C.) greater than 50.

9. The composition of claim 1 , wherein the polymer has a MWD(conv) greater than 6.

10. The composition of claim 1 , wherein the polymer is a low density polyethylene (LDPE), obtained by the high pressure, free radical polymerization of ethylene.

11. An article comprising at least one component formed from the composition of claim 1 .

12. The article of claim 11 , wherein the article is a film.

Assignees

• Dow Global Technologies Llc

Inventors

• Karjala Teresa P
• Kardos Lori L
• Yau Wallace W
• Ortega Jose
• Vigil Jr Alfred E

Classifications

• C08J2323/06

  Polyethene · CPC title

• C08F110/02 Primary

  Ethene · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• C08F4/38

  Mixtures of peroxy-compounds · CPC title

• C08F2500/10

  Short chain branches · CPC title