Silica-Supported Organometallic Catalyst for Low Heat Generation Polymers
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Solution Overview
Problem
Current methods for producing polymerization catalyst compositions are costly and require expensive compounds and special processes, and they do not achieve sufficient dispersion of silica in polymers, limiting the reduction of heat generation in tires.
Innovation Solution
A method involving the mixing and aging of specific elements, including a rare earth element compound and silica, to create a polymerization catalyst composition that allows for the synthesis of polymers with highly dispersed silica, reducing the need for expensive compounds and special processes, and achieving low heat generation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polymerization catalyst compositions containing ionic compounds are used, then polymerization activity is maintained, but production cost increases due to expensive compounds and special processes
Solution Approach 1:
The patent replaces expensive ionic compounds with a cost-effective alternative system consisting of silica-supported organometallic catalysts combined with aluminum alkyl co-catalysts. This substitution uses more economical materials while maintaining catalytic functionality, directly addressing the cost reduction goal without sacrificing polymerization activity
Solution Approach 2:
The patent modifies the catalyst composition parameters by transitioning from ionic compounds to a silica-supported organometallic system with specific aluminum alkyl co-catalysts. This parameter change in catalyst chemistry enables cost reduction while preserving the essential polymerization activity through optimized catalyst-co-catalyst interactions
2Object-generated harmful factors
If silica is added to polymer compositions after polymerization, then heat generation is reduced, but silica dispersion is insufficient requiring additional coupling agents or compatibilizers
Solution Approach 1:
The patent incorporates silica into the polymerization catalyst composition before polymerization occurs. This preliminary incorporation allows silica to be integrated into the polymer matrix during the polymerization process itself, achieving uniform dispersion without requiring subsequent addition steps, coupling agents, or compatibilizers
Solution Approach 2:
The patent merges the silica filler function with the polymerization catalyst system by incorporating silica into the catalyst composition. This combination enables silica to serve dual purposes: as a catalyst support/component and as a dispersed filler in the final polymer, eliminating the need for separate filler addition and surface treatment processes
3Object-generated harmful factors
If kneading time is extended to reduce heat generation, then heat generation is reduced slightly, but production efficiency decreases and heat generation reduction is limited
Solution Approach 1:
The patent changes the fundamental parameter of silica incorporation timing from post-polymerization addition to in-situ incorporation during polymerization. This parameter change achieves superior silica dispersion that reduces heat generation intrinsically, eliminating the need for extended kneading time and thereby maintaining high production efficiency
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 method enables the production of polymers with improved abrasion resistance and low heat generation properties without using expensive compounds or conducting special processes, while ensuring high silica dispersion, thus enhancing the performance of tire rubber compositions.
Implementation Method 1
adding a first element to the mixture to react the first element with the mixture
Implementation Method 2
synthesis of a polymer component by polymerizing at least one of a conjugated diene compound and an unconjugated olefin in the presence of a polymerization catalyst composition
Data Source
AI summary
A method for producing a polymer containing silica that does not involve long kneading time, and a polymer composition having an intended low heat generation property. A polymerization catalyst composition is produced by mixing and aging a second element and a third element, and then adding a first element to the mixture to react the first element with the mixture. The first element contains a compound that contains a rare earth metal element, the second element contains a compound represented by the following formula (X), and the third element contains silica. YR1aR2bR3c (X) (In the formula, Y is a metal; R1 and R2 are hydrogen atoms or hydrocarbon groups; and R3 is a hydrocarbon group, and R1, R2, and R3 are the same as or different from each other, a, b, and c are 0 or 1.).