Ethylene-based polymer composition for films with improved toughness

Patent metadata

Field	Value
Publication number	US-10138362-B2
Application number	US-201515311391-A
Country	US
Kind code	B2
Filing date	Jun 26, 2015
Priority date	Jun 26, 2014
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The invention provides a composition comprising a first composition, comprising at least one ethylene-based polymer, and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio I10/I2 that meets the following equation: I10/I2≥7.0−1.2×log (I2). The invention also provides a process to form a composition comprising at least two ethylene-based polymers, said process comprising the following: polymerizing ethylene, and optionally at least one comonomer, in solution, in the presence of a catalyst system comprising a metal-ligand complex of Structure I, as described herein, to form a first ethylene-based polymer; and polymerizing ethylene, and optionally at least one comonomer, in the presence of a catalyst system comprising a Ziegler/Natta catalyst, to form a second ethylene-based polymer.

First claim

The invention claimed is:

1. A composition comprising a first composition, comprising at least one ethylene-based polymer, and wherein the first composition comprises a MWCDI value greater than 1.2, and a melt index ratio (I10/I2) that meets the following equation: I10/I2≥7.0−1.2×log (I2).

2. The composition of claim 1 , wherein the first composition has a MWCDI value less than, or equal to, 10.0.

3. The composition of claim 1 , wherein the ethylene-based polymer is an ethylene/α-olefin interpolymer.

4. The composition of claim 1 , wherein the first composition further comprises a second ethylene-based polymer.

5. The composition of claim 4 , wherein the second ethylene-based polymer is an ethylene/α-olefin interpolymer.

6. The composition of claim 1 , wherein the first composition has a ZSVR value from 1.2 to 3.0.

7. The composition of claim 1 , wherein the first composition has a melt index ratio I10/I2 less than, or equal to, 9.2.

8. The composition of claim 1 , wherein the first composition has a vinyl unsaturation level greater than 10 vinyls per 1,000,000 total carbons.

9. The composition of claim 1 , wherein the composition further comprises another polymer.

10. The composition of claim 9 , wherein the polymer is selected from the following: a LLDPE, a LDPE, a HDPE, a propylene-based polymer, or a combination thereof.

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 or coating.

Assignees

• Dow Global Technologies Llc

Inventors

• Wang Jian
• Jain Pradeep
• Demirors Mehmet
• Ginger Douglas S
• Castelluccio Anthony J
• Kapur Mridula

Classifications

• B32B7/00

  Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers · CPC title

• B32B2307/724

  Permeability to gases, adsorption · CPC title

• C08L2205/16

  Fibres; Fibrils · CPC title

• C08J2423/08

  Copolymers of ethene (C08J2423/16 takes precedence) · CPC title

• B32B5/00

  Layered products characterised by the non- homogeneity or physical structure {, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts} · CPC title