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Polyethylene copolymers having a particular comonomer distribution

A technology of polyethylene copolymers and comonomers, applied in the field of polyethylene copolymers, can solve the problems of difficult polymer performance correlation in TREF data

Active Publication Date: 2021-06-18
UNIVATION TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes it difficult to correlate TREF data with polymer properties

Method used

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  • Polyethylene copolymers having a particular comonomer distribution
  • Polyethylene copolymers having a particular comonomer distribution
  • Polyethylene copolymers having a particular comonomer distribution

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[0347] It should be understood that while the disclosure has been described in connection with particular embodiments thereof, the foregoing description is intended to illustrate and not to limit the scope of the disclosure. Other aspects, advantages, and modifications will be apparent to those skilled in the art to which the present disclosure pertains. Accordingly, the following examples are set forth in order to provide those skilled in the art with a complete disclosure and description of how to make and use the disclosed compositions and are not intended to limit the scope of the disclosure.

[0348] For simplicity, only certain ranges are explicitly disclosed herein. However, a range from any lower limit may be combined with any upper limit to recite a range not specifically recited, and a range from any lower limit may be combined with any other lower limit to recite a range not specifically recited, in the same manner , a range from any upper limit may be combined wit...

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Abstract

Novel polyethylene copolymers having a relatively high comonomer partitioning tendency are disclosed as are methods for their preparation. The comonomer partitioning tendency is the tendency for a copolymer to have comonomer in the higher molecular weight chains. Novel metrics for describing the comonomer partitioning tendency are also disclosed.

Description

[0001] This application is an application date of April 21, 2016, the application number is 201680022833.5 (international application number is PCT / US2016 / 028545), and the name is "polyethylene copolymer with specific comonomer distribution". case application. technical field [0002] The present disclosure relates to polyethylene copolymers having a specific comonomer distribution, a novel metric for describing the comonomer distribution and a method for obtaining said metric. Background technique [0003] It is well established that polyethylene copolymers can be prepared with a variety of catalysts such as Ziegler-Natta catalysts, chromium-based catalysts, metallocene catalysts, non-metallocene bulky ligand transition metal catalysts, or combinations thereof (eg ethylene alpha-olefin copolymer). [0004] Single site catalysts, such as metallocene catalysts, can be used to produce relatively uniform polyethylene copolymers. In contrast to traditional Ziegler-Natta cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/02C08F210/16C08F4/6592
CPCC08F210/02C08F210/16C08F4/65925C08F4/65927C08F4/65912C08F4/65916C08F2420/12C08F4/65904C08F210/14C08F2500/02C08F2500/04C08F2500/06C08F2500/12C08L23/0815C08F2/01C08F2/04C08F2/34
Inventor R·L·库尔曼
Owner UNIVATION TECH LLC
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