Aminosilane Preparation via Halogenated Alkane Reaction
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Solution Overview
Problem
Current methods for preparing aminosilane-based compounds face challenges in achieving high purity and yield, and their interaction with modified conjugated diene-based polymers is insufficient, leading to suboptimal physical properties in rubber compositions such as abrasion resistance and processability.
Innovation Solution
A method involving the reaction of a halogenated alkane compound with a hetero compound containing nitrogen, allowing for the selective introduction of an alkoxysilylamino group and a functional group, resulting in an aminosilane-based compound with high purity and improved interaction with conjugated diene-based polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to prepare aminosilane-based compounds, then the preparation process is simple, but the purity and yield are low
Solution Approach 1:
The preparation method is divided into multiple sequential steps: Step 1 involves reacting a diene-based polymer with an aminosilane compound to introduce amino groups; Step 2 involves further modification with additional reagents. This segmentation allows each step to be optimized independently, achieving high purity (95% or more) and high yield (90% or more) while maintaining manageable process complexity
Solution Approach 2:
The patent introduces functional groups (amino groups and silane groups) into the diene-based polymer before final rubber composition formulation. This preliminary modification ensures that the polymer has the necessary functional groups ready for interaction with inorganic fillers, eliminating the need for complex post-processing and improving overall preparation efficiency
2Temperature
If inorganic filler is added to rubber composition to decrease exothermic properties, then exothermic properties improve, but dispersion becomes difficult and physical properties degrade
Solution Approach 1:
The patent introduces specific functional groups (amino groups and silane groups) at localized positions on the diene-based polymer chains. These functional groups create local interaction sites that specifically bind to inorganic filler surfaces, improving dispersion without requiring uniform modification throughout the entire polymer structure. This localized functionalization maintains the bulk properties of the polymer while enhancing interfacial interactions
Solution Approach 2:
The patent creates a composite structure by combining diene-based polymer with inorganic fillers through chemical bonding via amino and silane functional groups. This composite approach ensures strong interfacial adhesion between the organic polymer matrix and inorganic filler particles, improving dispersion stability and maintaining physical properties such as abrasion resistance and cracking resistance while achieving low exothermic properties
3Stability of the object's composition
If diene-based polymer is modified with functional groups to improve dispersion, then dispersibility improves, but physical properties such as abrasion resistance and processability are insufficient
Solution Approach 1:
The patent carefully controls the concentration and type of functional groups introduced into the diene-based polymer. By optimizing the amount of aminosilane compound and modification conditions, the patent achieves the right balance: enough functional groups to ensure good dispersion of inorganic fillers, but not so many that they compromise the polymer's mechanical strength, abrasion resistance, or processability. This parameter optimization resolves the contradiction between dispersibility and physical properties
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 preparation of aminosilane-based compounds with high purity and yield, enhancing the compatibility of modified conjugated diene-based polymers with inorganic fillers, thereby improving exothermic properties, tensile strength, abrasion resistance, and processability in rubber compositions.
Implementation Method 1
A method involving the reaction of a halogenated alkane compound with a hetero compound containing nitrogen, allowing for the selective introduction of an alkoxysilylamino group and a functional group
Data Source
AI summary
The present invention provides a novel method for preparing an aminosilane-based compound, by which an aminosilane-based compound used for preparing a modified and conjugated diene-based polymer which shows excellent affinity with an inorganic filler in a rubber composition and increases dispersibility, may be prepared in high purity and high yield.