# US 10,370,469 B2 · Ethylene/1-butene copolymers with enhanced resin processability

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,370,469 B2
- Document ID: US10370469B2
- Status: Granted
- Kind: B2
- Application number: 15/720,233
- Filed: 2017-09-29
- Published: 2018-01-25
- Granted: 2019-08-06
- Earliest claimed: 2015-05-27
- Assignees: NOVA Chemicals (International) S.A.
- Applicants: NOVA Chemicals (International) S.A.
- Inventors: Patrick Lam; Victoria Ker; Robert Quaiattini
- Web page: https://patentgrep.com/patent/US10370469B2

## CPC

- C08F 210/16: Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/327: {comprising polyolefins obtained by a metallocene or single-site catalyst}
- C08F 4/6592: containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
- C08F 210/08: Butenes
- C08J 5/18: Manufacture of films or sheets
- B32B 2250/24: All layers being polymeric
- B32B 2307/4026: within the layer by addition of a colorant, e.g. pigments, dyes
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/558: Impact strength, toughness
- B32B 2307/5825: Tear resistant
- C08F 4/65912: {in combination with an organoaluminium compound}
- C08F 4/65916: {supported on a carrier, e.g. silica, MgCl2, polymer}
- C08F 2410/02: Anti-static agent incorporated into the catalyst
- C08F 2420/04: Cp or analog not bridged to a non-Cp X ancillary anionic donor
- C08F 2500/26: Use as polymer for film forming
- C08J 2323/08: Copolymers of ethene (C08J2323/16 takes precedence)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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

Ethylene/1-butene copolymers made with a single site catalyst system have high melt strength and good processability.

## Claims

### Claim 1

A process for making an ethylene/1-butene copolymer, the process comprising polymerizing ethylene and 1-butene with a single site catalyst system in a gas phase polymerization reactor, wherein the ethylene/1-butene copolymer has density of from 0.912 to 0.94 g/cm3, a melt index (12) of from 0.5 to 10 g/10 min, a melt flow ratio (121/12) of from 20 to 35, a molecular weight distribution (Mw/Mn) of from 2.0 to 4.5, and an accelerated haul-off melt strength (σMS) as determined by Rosand capillary rheometry at 190° C., of at least 3.0 cN; wherein the single site catalyst system comprises a phosphinimine catalyst, a cocatalyst and an inert support.

### Claim 2 (depends on 1)

The process of claim 1 wherein the phosphinimine catalyst has the formula:
(1-R¥-Indenyl)Ti(N═P(t-Bu)3)X2;
wherein R¥ is a substituted or unsubstituted alkyl group, a substituted or an unsubstituted aryl group, or a substituted or unsubstituted benzyl group, wherein substituents for the alkyl, aryl or benzyl group are selected from alkyl, aryl, alkoxy, aryloxy, alkylaryl, arylalkyl and halide substituents; and wherein X is an activatable ligand.

### Claim 3

A process for making an ethylene/1-butene copolymer, the process comprising polymerizing ethylene and 1-butene with a single site catalyst system in a gas phase polymerization reactor, wherein the ethylene/1-butene copolymer has density of from 0.912 to 0.94 g/cm3, a melt index (I2) of from 0.5 to 10 g/10 min, a melt flow ratio (I21/I2) of from 20 to 35, a molecular weight distribution (Mw/Mn) of from 2.0 to 4.5, and which satisfies the following relationship:
(CDBI50/δXO)3.0≤6.5−5.7 log [a(1.5(I21/I2)+(Mw/Mn))];
where CDBI50 is the composition distribution breadth index, δXO is the crossover phase angle at a frequency of 1.0 rad/s and a is the CY a parameter.

### Claim 4 (depends on 3)

The process of claim 3 wherein the ethylene/1-butene copolymer further satisfies the relationship:
σMS≥5.0×10−4×G*XO;
where σMS is the accelerated haul-off melt strength determined at 190° C.; and G*XO is the crossover complex modulus at a frequency of 1.0 rad/s.

### Claim 5 (depends on 3)

The process of claim 3, wherein the ethylene/1-butene copolymer has an accelerated haul-off melt strength (σMS) as determined by Rosand capillary rheometry at 190° C., of at least 3.0 cN.

### Claim 6 (depends on 4)

The process of claim 4, wherein the ethylene/1-butene copolymer has an accelerated haul-off melt strength (σMS) as determined by Rosand capillary rheometry at 190° C., of at least 3.0 cN.

### Claim 7 (depends on 3)

The process of claim 3 wherein the single site catalyst system comprises a phosphinimine catalyst, a cocatalyst and an inert support.

### Claim 8 (depends on 7)

The process of claim 7 wherein the phosphinimine catalyst has the formula:
(1-R¥-Indenyl)Ti(N═P(t-Bu)3)X2;
wherein R¥ is a substituted or unsubstituted alkyl group, a substituted or an unsubstituted aryl group, or a substituted or unsubstituted benzyl group, wherein substituents for the alkyl, aryl or benzyl group are selected from alkyl, aryl, alkoxy, aryloxy, alkylaryl, arylalkyl and halide substituents; and wherein X is an activatable ligand.