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Tetra-functional long-chain branched ethylene-based polymers

A polymer, ethylene technology, applied in the field of tetrafunctional long-chain branched ethylene polymers, can solve problems such as limitations

Pending Publication Date: 2021-06-11
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The re-incorporation mechanism does not produce much branching, and branching can only occur after polymer chains have been created, further limiting the amount of branching that can occur

Method used

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  • Tetra-functional long-chain branched ethylene-based polymers
  • Tetra-functional long-chain branched ethylene-based polymers
  • Tetra-functional long-chain branched ethylene-based polymers

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0194] h smax = Height of the scaled MWD at the point of maximum slope

[0195] pt1=S 最大 LogM value

[0196] pt2 = LogM value, where S 最大 The tangent intersects the x-axis

[0197] The MWD area measure is defined below, where A 高 Just the area where the MWD region falls off after the point of maximum slope. Second area measure A 尾部 is depicted in Figure 15 Small high MW area in and through from A 高 Evaluate by subtracting the area of ​​the triangle.

[0198]

[0199] A 尾部 =A 高 -1 / 2(H smax ) 2 / S 最大 (51)

[0200] The area measure A was tested on the MWD model for "ladder branching" and conventional diene branching 高 and A 尾部 , where the results are plotted in Figure 16 , Figure 17 , Figure 18 ,with Figure 19 middle. The figure shows that by A 高 or A 尾部 The defined high MW area increases dramatically with increasing levels of conventional branching. However, the "trapezoidal branching" model predicts high MW area measures (A 高 or A 尾部 ) are hardl...

example

[0280] Tetrafunctional branching in the presence of various multichain catalysts and various dienes

[0281] The results of the small-scale polymerizations are summarized in Tables 3 to 7 (the experiments were in parallel polymerization reactors, PPR). The polymer results reported in Tables 3 to 7 were generated by polymerizing ethylene, octene and diene species in the presence of multi-chain catalysts and single-chain catalyst controls. The polymer results for each of Tables 3 through 7 are the product of various catalysts and diene species. The results in Table 3 are based on 3-methyl-1,4 in the presence of Comparative Catalyst C1 (Comp. - Polymer products of pentadiene, ethylene and octene. The results in Table 4 are based on 1,4-pentadiene, ethylene and octene in the presence of Catalyst 2 and Catalyst 4 ("Cat.4") Polymer product. The results in Table 5 are based on 1 in the presence of Comparative Catalyst C1, Catalyst 3 ("Cat.3"), Catalyst 5 ("Cat.5") and Catalyst 6 ("...

example 1

[0285] Example 1 - Tetrafunctional branching through 3-methyl-1,4-pentadiene

[0286] Table 3: Small scale polymerization (PPR) with 3-methyl-1,4-pentadiene as diene species.

[0287]

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PUM

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Abstract

Ethylene-based polymers of this disclosure include a melt viscosity ratio (V0.1 / V100) at 190 DEG C of at least 10, where V0.1 is the viscosity of the ethylene-based polymer at 190 DEG C at a shear rate of 0.1 radians / second, and V100 is the viscosity of the ethylene-based polymer at 190 DEG C at a shear rate of 100 radians / second; and a molecular weight tail quantified by an MWD area metric, ATAIL, and ATAIL is less than or equal to 0.04 as determined by gel permeation chromatography using a triple detector.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 738,612, filed September 28, 2018, the entire disclosure of which application is hereby incorporated by reference. technical field [0003] Embodiments of the present disclosure relate generally to polymer compositions having long chain branches and methods of synthesizing the polymer compositions. Background technique [0004] Olefin-based polymers such as polyethylene and polypropylene are produced by various catalyst systems. The choice of such catalyst systems used in the polymerization process of olefin-based polymers is an important factor contributing to the characteristics and properties of such olefin-based polymers. [0005] Polyethylene and polypropylene are manufactured for use in a variety of articles. Polyethylene and polypropylene polymerization processes may differ in many ways to produce a variety of resulting polyethylen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/18C08F210/16
CPCC08F210/16C08F210/02C08F210/18C08F4/64044C08F236/20C08F2500/29C08F2500/28C08F210/14C08F2500/02C08F2500/03C08F2500/09C08F2500/12C08F2500/27C08F2500/34C08F2500/38C08F2500/04C08F2500/17C08F10/02C08F110/02
Inventor T·卡什亚普R·D·J·弗勒泽D·J·阿里欧拉
Owner DOW GLOBAL TECH LLC
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