# US 9,752,021 B2 · Ethylene/alpha-olefin interpolymer composition

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- Number: US 9,752,021 B2
- Document ID: US9752021B2
- Status: Granted
- Kind: B2
- Application number: 14/762,898
- Filed: 2014-03-13
- Published: 2016-03-10
- Granted: 2017-09-05
- Earliest claimed: 2013-03-28
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Mehmet Demirors; Teresa P. Karjala; Julie W. Mckenna; Douglas S. Ginger
- Web page: https://patentgrep.com/patent/US9752021B2

## CPC

- C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond}
- C08F 210/16: Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
- C08J 5/18: Manufacture of films or sheets
- C08L 23/06: Polyethylene
- C08F 4/65908: {in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+}
- C08F 4/65912: {in combination with an organoaluminium compound}
- C08F 2410/04: Dual catalyst, i.e. use of two different catalysts, where none of the catalysts is a metallocene
- C08F 2420/02: Cp or analog bridged to a non-Cp X anionic donor
- C08J 2323/08: Copolymers of ethene (C08J2323/16 takes precedence)
- C08J 2423/06: Polyethene
- C08L 2203/16: used for films
- C08L 2205/02: containing two or more polymers of the same C08L -group
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L 2207/066: LDPE (radical process)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)

## Abstract

The instant invention provides an ethylene/alpha-olefin interpolymer composition suitable for blown film applications, and blown films made therefrom. The ethylene/alpha-olefin interpolymer composition suitable for blown film applications according to the present invention comprises greater than 80 percent by weight of units derived from ethylene and 20 percent or less by weight of units derived from one or more alpha olefin co-monomers, wherein said ethylene/alpha-olefin interpolymer has a density in the range of from 0.910 to 0.918 g/cm3, a melt index I2 in the range of from 0.5 to 1.1 g/10 minutes, a melt flow ratio I10/I2 in the range of from 8 to 10, a melt strength in the range of from 3 to 6 cN, a highest temperature fraction in the range of from 11 to 14 percent determined by CEF, a highest peak temperature fraction by CEF in range of from 96 to 100° C., and a lowest temperature fraction from CEF in the range of from 2 to 5 percent, and a DSC heat curve having three melting peaks with a highest temperature melting peak in the range of from 120 to 124° C., a crystallinity in the range of from 40 to 50 percent.

## Claims

### Claim 1

A blown film comprising an ethylene/alpha-olefin interpolymer composition comprising greater than 80 percent by weight of units derived from ethylene and 20 percent or less by weight of units derived from one or more alpha olefin co-monomers, wherein said ethylene/alpha-olefin interpolymer has a density in the range of from 0.910 to 0.916 g/cm3, a melt index I2 in the range of from 0.5 to 1.1 g/10 minutes, a melt flow ratio I10/I2 in the range of from 8 to 10, a melt strength in the range of from 3 to 6 cN, a highest temperature fraction in the range of from 8 to 15 percent determined by CEF, a highest peak temperature fraction by CEF in the range of from 96 to 100° C., and a lowest temperature fraction from CEF in the range of from 2 to 5 percent, and a DSC heat curve having three melting peaks with a highest temperature melting peak in the range of from 120 to 124° C., and a crystallinity in the range of from 40 to 50 percent.

### Claim 2 (depends on 1)

The blown film of claim 1, wherein said blown film is characterized by having a Total Haze in the range of less than 20%; wherein said film has a 1 mil thickness, and said polyolefin composition further comprises one or more antiblock agents and one or more slip agents, and wherein said film is produced via a blown film process which has at least a 10 percent production rate increase over another ethylene based polymer having one or more properties outside of the required property ranges of the ethylene/alpha-olefin interpolymer composition.

### Claim 3 (depends on 2)

The blown film of claim 2, wherein said another ethylene based polymer composition having a melt index outside of the required melt index range of the ethylene/alpha-olefin interpolymer composition.

### Claim 4 (depends on 1)

The blown film of claim 1, wherein said blown film is characterized by having a Total Haze in the range of less than 20%; wherein said film has a 1 mil thickness and wherein said film is produced via a blown film process which has at least a 10 percent production rate increase over another ethylene based polymer having one or more properties outside of the required property ranges of the ethylene/alpha-olefin interpolymer composition.

### Claim 5 (depends on 1)

The blown film of claim 1 comprising the ethylene/alpha-olefin interpolymer composition and one or more LDPEs or one or more LLDPEs.

### Claim 6 (depends on 1)

An article comprising one or more layers, wherein at least one of said layers comprises the blown film of claim 1.

### Claim 7 (depends on 6)

The article of claim 6, wherein the blown film comprises the ethylene/alpha-olefin interpolymer composition and one or more LDPEs or one or more LLDPEs.

### Claim 8 (depends on 1)

The blown film of claim 1, characterized by an oxygen transmission rate in the range of from 600 to 800 cc-mil/100 sq. in-day-atm), measured at 23° C. and 0% relative humidity.

### Claim 9 (depends on 1)

The blown film of claim 1, characterized by a moisture vapor transmission rate in the range of 1.1 to 1.4 gm-mil/100 sq.in-day at 38° C., 100% RH.

### Claim 10 (depends on 1)

The blown film of claim 1, wherein the ethylene/alpha-olefin interpolymer composition has a melt index I2 in the range of from 0.5 to 0.8 g/10 minutes.

### Claim 11 (depends on 1)

The blown film of claim 1, wherein the ethylene/alpha-olefin interpolymer composition has a molecular weight distribution (Mw/Mn) of 3 to 5.

### Claim 12 (depends on 1)

The blown film of claim 1, wherein the ethylene/alpha-olefin interpolymer composition has a melt flow ratio I10/I2 of 8.2 to 10.

### Claim 13 (depends on 1)

The blown film of claim 1, wherein the ethylene/alpha-olefin interpolymer composition has a melt strength of 4 to 5 cN.

### Claim 14 (depends on 1)

The blown film of claim 1, wherein the ethylene/alpha-olefin interpolymer composition is catalyzed using at least two catalysts and one or more co-catalysts.

### Claim 15 (depends on 14)

The blown film of claim 14, wherein the at least two catalysts comprise a Ziegler-Natta catalyst and a catalyst comprising an s-indacenyl silanaminato complex of titanium.

### Claim 16 (depends on 15)

The blown film of claim 15, wherein the at least two catalysts comprise titanium [N-(1,1-dimethylethyl)-1,1-dimethyl-1-[(1,2,3,3a,8a-η)-1,5,6,7-tetrahydro-2-methyl-s-indacen-1-yl]silanaminato(2-)-KN][(1,2,3,4-η)-1,3-pentadiene] (CAT-B).

### Claim 17 (depends on 14)

The blown film of claim 14, wherein the ethylene/alpha-olefin interpolymer composition is produced by solution phase polymerization using a dual reactor system.