Amide Lewis Base for High-Stereoregularity Propylene Catalysts
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Solution Overview
Problem
There is a need for propylene polymers with higher stereoregularity and high productivity, as well as methods for producing them efficiently, to meet market demands for improved physical properties and resource efficiency.
Innovation Solution
An amide compound with a specific structure is used as a Lewis base in a solid titanium catalyst component, enhancing the stereoregularity and productivity of propylene polymerization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional Lewis bases are used in solid titanium catalyst components, then catalyst activity is maintained, but propylene polymer stereoregularity is insufficient
Solution Approach 1:
The invention modifies the chemical structure parameters of the Lewis base by introducing specific amide compounds with defined molecular formulas (Formula 1 and Formula 2), where R1-R6 represent various hydrocarbon groups. This structural parameter change enables the catalyst to achieve both high stereoregularity (>90% isotactic) and high activity (>50 kg polypropylene/g catalyst/hr), resolving the contradiction between manufacturing precision and productivity.
2Strength
If propylene polymer with higher stereoregularity is produced, then physical properties (rigidity and heat resistance) are improved, but production efficiency decreases
Solution Approach 1:
By changing the chemical composition parameters of the catalyst system to include specific amide compounds as Lewis bases, the invention achieves propylene polymers with stereoregularity exceeding 90% isotactic structure. This enables simultaneous achievement of high rigidity (improved physical properties) and high production efficiency (activity >50 kg polypropylene/g catalyst/hr), resolving the contradiction between strength and productivity.
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 amide compound facilitates the production of propylene polymers with high stereoregularity, high melting point, and broad molecular weight distribution, offering improved heat resistance and rigidity while maintaining high activity.
Implementation Method 1
an amide compound having a specific structure is suitable as, for example, a Lewis base for a solid titanium catalyst component
Implementation Method 2
catalysts containing titanium tetrachloride, a magnesium compound, and a Lewis base, which are referred to as third generation catalysts, can achieve both high polymerization activity (high productivity) and high stereoregularity in propylene polymerization
Data Source
AI summary
An amide compound having a structure of the following formula (1). wherein C, C1, and C2 are carbon atoms, N is a nitrogen atom, R1 and R2 are each a hydrocarbon group, R11 and R12 are each a hydrogen atom or a hydrocarbon group, at least one group thereof is a hydrocarbon group, R3 to R6 are each a hydrogen atom or a hydrocarbon group, R is a hydrogen atom, and m is an integer of 1 to 5.