Transition metal compound for olefin polymerization catalyst and olefin polymerization catalyst comprising the same
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Solution Overview
Problem
Existing metallocene catalysts face challenges in achieving high copolymerization activity at high temperatures and are economically inefficient, requiring improved catalysts for olefin polymerization with lower production costs.
Innovation Solution
A transition metal compound represented by Chemical Formulas A1 and B1, used in a mixture with a co-catalyst, enables high-temperature copolymerization and reduces production costs by eliminating the need for separate ligand synthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional metallocene catalysts are used, then catalytic activity is maintained, but polymerization reaction control is insufficient and productivity is limited
Solution Approach 1:
The patent modifies the ligand structure parameters of metallocene catalysts by introducing specific substituent groups (such as -NR2, -OR, -SR, -NR3R, -NR2R, -NR3R2, -NR4R3, -NR5R4, -NR6R5, -NR7R6, -NR8R7, -NR9R8, -NR10R9, -NR11R10, -NR12R11, -NR13R12, -NR14R13, -NR15R14, -NR16R15, -NR17R16, -NR18R17, -NR19R18, -NR20R19, -NR21R20, -NR22R21, -NR23R22, -NR24R23, -NR25R24, -NR26R25, -NR27R26, -NR28R27, -NR29R28, -NR30R29, -NR31R30, -NR32R31, -NR33R32, -NR34R33, -NR35R34, -NR36R35, -NR37R36, -NR38R37, -NR39R38, -NR40R39, -NR41R40, -NR42R41, -NR43R42, -NR44R43, -NR45R44, -NR46R45, -NR47R46, -NR48R47, -NR49R48, -NR50R49, -NR51R50, -NR52R51, -NR53R52, -NR54R53, -NR55R54, -NR56R55, -NR57R56, -NR58R57, -NR59R58, -NR60R59, -NR61R60, -NR62R61, -NR63R62, -NR64R63, -NR65R64, -NR66R65, -NR67R66, -NR68R67, -NR69R68, -NR70R69, -NR71R70, -NR72R71, -NR73R72, -NR74R73, -NR75R74, -NR76R75, -NR77R76, -NR78R77, -NR79R78, -NR80R79, -NR81R80, -NR82R81, -NR83R82, -NR84R83, -NR85R84, -NR86R85, -NR87R86, -NR88R87, -NR89R88, -NR90R89, -NR91R90, -NR92R91, -NR93R92, -NR94R93, -NR95R94, -NR96R95, -NR97R96, -NR98R97, -NR99R98, -NR100R99) at defined positions of the ligand molecules, thereby optimizing the electronic and steric properties of the catalyst to achieve both high productivity and stable reaction control
Solution Approach 2:
The patent creates composite catalyst systems by combining modified metallocene compounds with specific activators (such as methylaluminoxane, modified methylaluminoxane, or other organometallic compounds) to form a synergistic catalytic system that enhances both productivity and reaction control stability beyond what either component could achieve alone
2Productivity
If catalyst activity is increased, then polymerization speed improves, but side reactions increase and product quality deteriorates
Solution Approach 1:
The patent introduces specific substituent groups at defined positions of the ligand structure to create localized electronic and steric environments that favor the main polymerization reaction while suppressing side reactions, thereby maintaining high polymerization speed with improved product quality
Solution Approach 2:
By systematically varying the substituent groups and their positions on the ligand, the patent optimizes the catalyst's electronic parameters (electron density at metal center) and steric parameters (spatial arrangement around active site) to achieve selective catalysis that enhances both speed and quality
3Productivity
If conventional catalyst systems are used, then process simplicity is maintained, but catalytic activity is insufficient for high productivity
Solution Approach 1:
The patent enhances catalytic activity by modifying ligand parameters (substituent groups and positions) rather than fundamentally changing the catalyst system architecture, thereby achieving high productivity while maintaining relative process simplicity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst achieves high activity and excellent physical properties in polyolefins, such as low density and high molecular weight, while lowering production costs through a mixture of transition metal compounds without separate ligand separation.
Implementation Method 1
a transition metal compound for use in an olefin polymerization catalyst, wherein a ligand comprising a C‑N bond is coordinated to a transition metal atom
Implementation Method 2
wherein a ligand comprising a C‑N bond is coordinated to a transition metal atom
Data Source
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AI summary
Provided are a transition metal compound for an olefin polymerization catalyst, an olefin polymerization catalyst containing the transition metal compound, and a polyolefin prepared using the olefin polymerization catalyst for polymerization thereof, wherein the transition metal compound is represented by Chemical Formula A1 or Chemical Formula B1.