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Catalyst system for multi-block copolymer formation

A technology of catalyst and pre-catalyst, applied in the field of olefin polymerization catalyst

Active Publication Date: 2019-12-24
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Catalyst system for multi-block copolymer formation
  • Catalyst system for multi-block copolymer formation
  • Catalyst system for multi-block copolymer formation

Examples

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[0603] method

[0604] Combined catalyst efficiency: The combined catalyst efficiency is obtained by dividing the quality of the prepared olefin block copolymer (such as the number of kilograms (kg 聚合物 )) divided by the mass of metal from both procatalysts (e.g. total milligrams or total grams (g 金属 )) to calculate.

[0605]3D-GPC: Molecular weights were measured using a high temperature triple detector gel permeation chromatography (3D-GPC) system equipped with a Robotic Assistant Delivery (RAD) system for sample preparation and sample injection. The concentration detector was an infrared concentration detector (IR4 from Polymer Char, Valencia, Spain), which was used to determine molecular weight and molecular weight distribution. The other two detectors were a 2-angle laser light scattering detector model 2040 from Precision Detectors (Agilent), and a 4-capillary differential viscometer detector model 150R from Malvern (Houston, TX). A 15° angle of the light scattering de...

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Abstract

The present disclosure relates to a catalyst system for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first olefin polymerization procatalyst, (B) a second olefin polymerization procatalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by procatalyst (A) under equivalentpolymerization conditions, and (C) a chain shuttling agent.

Description

technical field [0001] The examples relate to olefin polymerization catalysts, their preparation, and the use of specific catalyst compositions to produce polyolefins, including the use of chain shuttling agents in olefin polymerization processes. Background technique [0002] The properties and applications of polyolefins depend to varying degrees on the specific characteristics of the catalysts used in their preparation. Specific catalyst composition, activation conditions, steric and electronic characteristics, etc. can all be resolved to characterize the resulting polymer product. Indeed, many polymer characteristics, such as comonomer incorporation, molecular weight, polydispersity, and long-chain branching, as well as related physical properties (such as density, modulus, melt properties, tensile properties, and optical properties), are Can be influenced by catalyst design. [0003] In recent years, the use of well-defined molecular procatalysts has often enabled enh...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F4/64
CPCC08F210/16C08F2410/01C08F2410/04C08F4/65908C08F4/65912C08F297/083C08F4/64193C08F4/64189C08F4/64048C08F210/14C08F2500/08C08F2500/12C08F2500/03C08F2500/32C08F2500/33C08F2500/34C08F4/52
Inventor D·D·德沃尔D·J·阿里欧拉G·R·鲁夫J·C·芒罗A·J·杨E·M·卡纳汉
Owner DOW GLOBAL TECH LLC