Unlock instant, AI-driven research and patent intelligence for your innovation.

Catalyst system for multi-block copolymer formation

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

Active Publication Date: 2019-12-06
DOW GLOBAL TECH LLC
View PDF82 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This improvement has not been demonstrated in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Catalyst system for multi-block copolymer formation
  • Catalyst system for multi-block copolymer formation
  • Catalyst system for multi-block copolymer formation

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0779] The following are exemplary non-limiting embodiments of the present disclosure and combinations thereof.

[0780] 1. A composition comprising the mixture or reaction product produced by combining:

[0781] (A) a first olefin polymerization procatalyst,

[0782] (B) a second olefin polymerization procatalyst, and

[0783] (C) chain shuttling agents,

[0784] wherein the first olefin polymerization procatalyst (A) comprises a metal-ligand complex of formula (I):

[0785] in:

[0786] M is zirconium or hafnium;

[0787] R 20 independently at each occurrence is a divalent aromatic or inertly substituted aromatic radical containing 5 to 20 atoms not counting hydrogen;

[0788] T 3 is a divalent hydrocarbon or silane group having 3 to 20 atoms not counting hydrogen, or an inertly substituted derivative thereof;

[0789] R D independently at each occurrence is a monovalent ligand group having 1 to 20 atoms not counting hydrogen, or two R D The groups are together a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/64C08F210/16
CPCC08F210/16C08F2410/01C08F2410/04C08F210/14C08F2500/08C08F4/64193C08F2/06C08F297/08C08F2/04C08F2/001C08F297/083C08F2800/20
Inventor D·D·德沃尔D·J·阿里欧拉A·L·克拉索夫斯基E·M·卡纳汉C·N·塞里奥尔特G·R·鲁夫T·T·文策尔J·克洛辛R·菲格罗亚
Owner DOW GLOBAL TECH LLC