Metallocene Catalyst Composition for High Adhesion Olefin Polymers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cycloolefin-based polymerization catalysts require excessive amounts and have low yield due to sensitivity to catalyst concentration, leading to poor adhesion to metals, which is a challenge for applications like flexible displays.
Innovation Solution
A compound with the formula {[H-P(R1)3]+2[(C6F5)3B-Z-B(C6F5)3]- is used as a co-catalyst, allowing two cationic metal centers to be positioned closely, maintaining high polymerization activity even at high monomer-to-catalyst ratios, enhancing adhesion to metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a catalyst with a complex structure is used for polymerization of norbonene including ester group, then the polymerization can proceed, but the catalyst must be used in excessive amount (1/100 to 1/400 ratio) and the polymerization yield is low
Solution Approach 1:
The patent changes the chemical structure parameters of the catalyst system by introducing a novel palladium complex with specific ligands (formula 1) and using it in combination with borate compounds as co-catalysts. This structural modification enables the catalyst to achieve high activity at much lower concentrations (1/50 to 1/2000 ratio), directly resolving the contradiction between catalyst quantity and productivity
Solution Approach 2:
The patent creates a composite catalyst system combining palladium complex (formula 1) with borate co-catalysts and activators. This composite approach synergistically enhances the catalytic activity, allowing the system to achieve high polymerization yields with reduced catalyst loading, thus resolving the contradiction between catalyst amount and productivity
2Productivity
If a catalyst with a complex structure is used for polymerization of norbonene including ester group, then the polymerization can proceed, but it is difficult to remove the remnant catalyst
Solution Approach 1:
The patent employs a catalyst system that can be easily deactivated and removed after serving its function. The palladium complex with specific ligand structure allows for controlled deactivation and removal, making the catalyst effectively 'short-living' and easy to eliminate from the final polymer product, thus resolving the contradiction between maintaining high activity and ease of removal
3Strength
If the cycloolefin-based monomer includes a polar group such as an ester group, then the adhesion to metal is improved, but the polymerization requires excessive catalyst amount
Solution Approach 1:
The patent changes the catalytic system parameters by developing a highly active palladium complex (formula 1) that can efficiently polymerize polar norbonene monomers at low catalyst concentrations. This enables simultaneous achievement of good adhesion properties (through polar group incorporation) and reduced catalyst usage, resolving the contradiction between adhesion strength and catalyst quantity
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
This approach results in high polymerization activity and improved adhesion to metals, achieving higher molecular weights and better polymer properties compared to conventional catalyst systems.
Implementation Method 1
two cationic metal centers can be positioned closely each other regardless of the concentration of metal compound, by using the compound including two anions in a molecule as a co-catalyst
Data Source
Figure 1
AI summary
The present invention relates to a novel metallocene compound, a catalyst composition including the compound and an olefin polymer prepared using the same. The metallocene compound and the catalyst composition can be used for preparing the olefin polymer with high copolymerization degree and high molecular weight. Particularly, the block copolymer with high heat resistance can be prepared by using the metallocene compound, and the olefin polymer with high melting point (Tm) can be obtained, even if co-monomer is used at an increased amount in preparation of olefin polymer.