Fluorinated Alkylammonium Borate Co-Catalyst for Stable Polymerization
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Solution Overview
Problem
Conventional co-catalysts for olefin, diene, and acetylene polymerization reactions suffer from neutral amine compound interactions that adversely affect polymerization, leading to reduced activity and stability of metal complex catalysts.
Innovation Solution
A fluorine-containing alkylammonium borate compound, represented by specific structural formulas, is developed to enhance metal complex catalyst activation and stability, thereby improving polymerization reactions of olefins, dienes, and acetylenes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Broensted acid salts (ammonium borates) are used as co-catalysts, then catalyst activation occurs, but neutral amine compounds are produced that interact adversely with the cationic active species, reducing polymerization activity and catalyst stability
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of the ammonium borate co-catalyst, specifically introducing fluorine atoms at the alpha-position of the alkyl group. This structural modification changes the electronic properties and basicity of the neutral amine byproduct, reducing its harmful interaction with the cationic active species while maintaining catalyst activation functionality.
Solution Approach 2:
The patent converts the harmful neutral amine byproduct into a beneficial or less harmful substance by modifying the parent ammonium borate structure. The fluorine substitution transforms the neutral amine from a harmful interacting species into a less basic, less harmful byproduct, thereby converting the harmful effect into a beneficial outcome where the byproduct no longer adversely affects the cationic active species.
2Productivity
If fluorine-containing alkylammonium borate compound is used as co-catalyst, then polymerization activity and catalyst activation ability are enhanced, but the compound structure becomes more complex
Solution Approach 1:
The patent applies local quality by introducing fluorine atoms only at specific positions (alpha-position) of the alkyl group in the ammonium borate structure, rather than throughout the entire molecule. This localized modification provides the desired enhancement in polymerization activity and catalyst activation while minimizing overall structural complexity. The fluorine substitution is concentrated in the critical region near the nitrogen atom where it has the greatest impact on performance.
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 fluorine-containing alkylammonium borate compound exhibits high polymerization activity and catalyst activation ability, providing a composition and industrial production method for effective polymerization reactions.
Implementation Method 1
the leaving group on the metal complex catalyst is protonated and eliminated from the metal complex catalyst to generate a cationic active species of the metal complex catalyst
Implementation Method 2
a fluorine-containing alkylammonium borate compound useful as a co-catalyst for the polymerization of olefin, diene, and acetylene
Implementation Method 3
non-coordinating anions derived from Broensted acid salt stabilize the active species
Implementation Method 4
In order to reduce the basicity of neutral amine compounds generated in the catalyst activation reaction, N-(pentafluorophenyl)pyrrolidinium tetrakis(pentafluorophenyl)borate and the like have been proposed as co-catalysts
Data Source
AI summary
A compound may be useful as a co-catalyst for polymerizing olefin, diene, and acetylene. A fluorine-containing alkylammonium borate compound of formula (1):wherein each symbol is as defined in the specification, may be highly active and useful as a co-catalyst used for the polymerization reactions of olefin, diene, and acetylene, compositions containing same. Production methods of such a fluorine-containing alkylammonium borate compound are also provided.