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Bimodal ethylene-based polymers having high molecular weight high density fractions

A polymer, high-density technology, applied in the field of bimodal ethylene-based polymers, can solve the problems of property limitations, difficult to control component reactions, low bimodal polymers, etc.

Pending Publication Date: 2021-03-09
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most processes used to produce bimodal ethylene-based polymers, this leads to limitations in the properties of the produced bimodal ethylene-based polymers
In particular, when dual catalysts are used, it may be difficult to produce bimodal polymers with tailored fractions of low and high density fractions because it may be difficult to control the reactions of the components in the presence of the catalyst

Method used

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  • Bimodal ethylene-based polymers having high molecular weight high density fractions
  • Bimodal ethylene-based polymers having high molecular weight high density fractions
  • Bimodal ethylene-based polymers having high molecular weight high density fractions

Examples

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example

[0159] The following examples illustrate features of the disclosure, but are not intended to limit the scope of the disclosure.

example 1

[0161] A bimodal ethylene based polymer was formed using a loop reactor as the first reactor and a plug flow reactor as the second reactor. The feed stream to the first reactor contained 1206 pounds per hour (lb / hr) of ISOPAR-E solvent, 206 lb / hr of ethylene monomer, 82 lb / hr of hexene. Hydrogen was also introduced into the first reactor at 6200 seem. The ethylene concentration at the outlet of the first reactor was 30 g / L. The first catalyst introduced into the first reactor includes a main catalyst and a co-catalyst. The main catalyst is C with the following structure 67 h 88 o 4 Zr; Zirconium; Dimethyl[[2,2"'-[1,3-propanediylbis(oxygen- K O)]bis[3",5,5"-tris(1,1-dimethylethyl)-5'-methyl[1,1':3',1"-terphenyl]-2'- olato- K O]](2-)]:

[0162]

[0163] The main catalyst was added as needed to control the reactor outlet ethylene concentration of 30 g / L, and at the reactor outlet, the main catalyst loading was usually 0.09 μmol / L. The cocatalyst is bis(hydrogenated ta...

example 2

[0168] A bimodal ethylene based polymer was formed using a loop reactor as the first reactor and a plug flow reactor as the second reactor. The feed stream to the first reactor contained 1194 lb / hr of ISOPAR-E solvent, 206 lb / hr of ethylene monomer, 76 lb / hr of hexene. Hydrogen was also introduced into the first reactor at 7635 seem. The feed hexene / yield ratio was 8.0 and the feed hexene concentration was 6.9 wt%. The ethylene concentration at the outlet of the first reactor was 25 g / L. The first catalyst introduced into the first reactor includes a main catalyst and a co-catalyst. The main catalyst is C with the following structure 67 h 88 o 4 Zr; Zirconium; Dimethyl[[2,2"'-[1,3-propanediylbis(oxygen- K O)]bis[3",5,5"-tris(1,1-dimethylethyl)-5'-methyl[1,1':3',1"-terphenyl]-2'- olato- K O]](2-)]:

[0169]

[0170] Procatalyst was added as needed to maintain an ethylene concentration of 25 g / L. At the reactor outlet, the catalyst loading was about 0.12 μmol / L. Th...

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Abstract

A bimodal ethylene -based polymer, including a high density fraction (HDF) from 3.0% to 25.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integrationat temperatures from 93 DEG C to 119 DEG C an I10 / I2 ratio from 5.5 to 7.5, wherein I2 is the melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190 DEG C and I10 is the melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190 DEG C, and a short chain branching distribution (SCBD) less than or equal to 10 DEG C, wherein theshort chain branching distribution is measured by CEF full width at half height.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application Serial No. 62 / 685,544, filed June 15, 2018, the entire contents of which are incorporated herein by reference. technical field [0003] Embodiments of the present disclosure generally relate to bimodal ethylene-based polymers having high density fractions. Background technique [0004] Historically, the production of bimodal ethylene-based polymers has been carried out by processes using either a single reactor with a single catalyst or a dual reactor with dual catalysts. In most processes for the production of bimodal ethylene-based polymers, this leads to limitations in the properties of the bimodal ethylene-based polymers produced. In particular, when dual catalysts are used, it may be difficult to produce bimodal polymers with tailored fractions of low and high density fractions because it may be difficult to control the reactions of the co...

Claims

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Application Information

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IPC IPC(8): C08F4/659C08F210/16
CPCC08F210/16C08F4/65908C08F2410/04C08F4/65904C08F2/001C08F4/64193C08F4/6555C08F2/01C08F210/14C08F2500/02C08F2500/03C08F2500/05C08F2500/10C08F2500/12C08F2500/17C08F2500/26C08F2500/37C08L23/12C08L2203/16C08L2205/02C08L2207/062C08L2207/066
Inventor K·E·哈特M·黛米洛斯T·W·甘布里尔P·P·方丹P·杰恩
Owner DOW GLOBAL TECH LLC