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Ethylene-based polymer compositions with branching

A polymer and ethylene technology, applied in the field of producing ethylene-based polymer compositions, can solve the problems of low crystallinity, low molecular weight extractable parts, etc.

Pending Publication Date: 2022-05-27
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process conditions required to obtain modified LDPE with high levels of branching often result in final products with lower crystallinity and higher levels of low molecular weight extractable fractions

Method used

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  • Ethylene-based polymer compositions with branching
  • Ethylene-based polymer compositions with branching
  • Ethylene-based polymer compositions with branching

Examples

Experimental program
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Effect test

example

[0117] The materials used in the examples are set forth in Table 1 below.

[0118] Table 1

[0119] business name illustrate source Diallyl maleate branching agent Sigma-Aldrich Isopar E solvent Exxon Mobil TPA tert-butyl peroxyacetate-initiator Akzo Nobel TPO tert-butyl peroxyethylhexanoate-initiator AkzoNobel acrylic chain transfer agent Dow

[0120] The polymerization is carried out in a continuously stirred tank reactor. Four electric heating belts were used to heat and / or cool the reactor to 220°C. The reactor pressure was about 800 bar. Propylene was used as chain transfer agent (CTA). Ethylene and propylene were fed to the top of the reactor through a stirring shaft. TPO and TPA diluted in Isopar E were injected into one side of the reactor to initiate the reaction. Diallyl maleate, also diluted in Isopar E, was fed into a separate syringe on one side of the reactor. The reactor residence time was abou...

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Abstract

The present disclosure provides an ethylene-based polymer. The ethylene-based polymer is formed by reacting an ethylene monomer and diallyl maleate ("BAIIM") under polymerization conditions. The ethylene-based polymer of the present invention having an ethylene monomer and a diallyl maleate branching agent is interchangeably referred to as' BAIIM-PE '.

Description

Background technique [0001] The level of branching in ethylene-based polymers such as low density polyethylene (LDPE) is primarily due to the reactor design (autoclave or tubular) and the polymerization conditions used to make LDPE. Branching agents are known for increasing the level of branching in LDPE. However, the process conditions required to obtain modified LDPE with a high level of branching generally result in a final product with lower crystallinity and higher content of low molecular weight extractables. [0002] Accordingly, the art recognizes a continuing need for LDPEs with increased melt strength relative to increased levels of branching (ie, LDPEs prepared under polymerization conditions that maintain good polymer properties). SUMMARY OF THE INVENTION [0003] The present disclosure provides an ethylene-based polymer. Ethylene-based polymers are formed by the reaction (under polymerization conditions) of ethylene monomer and bisallyl maleate ("BAIIM"). The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/02C08F222/28C08F222/26
CPCC08F210/02C08F222/28C08F222/26C08F2500/11C08F2500/12C08F4/38
Inventor A·L·克拉索夫斯基Y·F·Y·董A·E·弗兰克尔I·A·康斯坦丁诺夫S·芒贾尔S·W·埃瓦尔特R·P·帕拉德卡尔D·W·鲍格
Owner DOW GLOBAL TECH LLC