Silicon Azodicarbamide Synthesis via Direct Coupling
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Solution Overview
Problem
Current processes for preparing silicon-containing azodicarbamides require multiple synthesis steps and involve the oxidation of hydrazine derivatives, which are inefficient and complex.
Innovation Solution
A process involving the reaction of azobiscarboxy compounds with aminosilanes to produce silicon-containing azodicarbamides, eliminating the need for oxidation and simplifying the synthesis to a single step, using azobiscarboxy compounds of the general formula II and aminosilanes of the general formula III, with specific alkyl and aryl groups, to achieve high yields and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple synthesis steps and oxidation of hydrazine derivatives are used to prepare silicon-containing azodicarbamides, then the synthesis is more thorough, but the process complexity and time increase
Solution Approach 1:
The patent combines multiple synthesis steps into a single direct reaction between azobiscarboxy compounds and aminosilanes. This merging eliminates intermediate oxidation steps and multiple handling operations, thereby reducing process complexity while maintaining synthesis thoroughness through the direct formation of the desired azodicarbamide product.
Solution Approach 2:
The patent uses pre-synthesized azobiscarboxy compounds as starting materials, which have already been prepared through established industrial methods. This preliminary preparation allows the final silicon-containing azodicarbamide to be obtained in a single step without requiring oxidation of hydrazine derivatives, thus simplifying the overall process while ensuring thorough synthesis.
2Manufacturing precision
If multiple synthesis steps are used to prepare silicon-containing azodicarbamides, then the reaction is more complete, but the production time increases
Solution Approach 1:
The patent merges multiple reaction steps into a single direct coupling reaction between azobiscarboxy compounds and aminosilanes. This eliminates intermediate oxidation steps and reduces the number of isolation and purification cycles, thereby maintaining reaction completeness while significantly reducing overall production time.
Solution Approach 2:
The patent enables a continuous one-pot synthesis where the reaction proceeds directly from reactants to product without interruption for intermediate processing. The direct reaction maintains completeness through proper stoichiometry and conditions while eliminating time-consuming intermediate steps, thus improving productivity.
3Reliability
If oxidation of hydrazine derivatives is used, then the synthesis pathway is more established, but the process requires more steps and lower efficiency
Solution Approach 1:
The patent uses reliably prepared azobiscarboxy compounds as starting materials that can be obtained through established industrial synthesis methods. This preliminary preparation maintains pathway reliability while allowing the final step to proceed directly without oxidation, thereby improving synthesis efficiency through a simpler, more direct route to the desired product.
4Manufacturing precision
If complex purification is applied to obtain high purity silicon-containing azodicarbamides, then the product quality is improved, but the process complexity and time increase
Solution Approach 1:
The patent combines synthesis and purification considerations into a single streamlined process. The direct reaction between azobiscarboxy compounds and aminosilanes produces the desired product with minimal byproducts, reducing the need for complex purification steps while maintaining high product purity through careful reaction design and single-step isolation.
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 process achieves high yields and purity of silicon-containing azodicarbamides in a single step, eliminating the need for oxidation and complex purification, and can be used as adhesion promoters and coupling agents in rubber mixtures and other applications.
Implementation Method 1
The invention relates to a process for the preparation of silicon-containing azodicarbamides of the general formula I by reacting azobiscarboxy compounds of the general formula II with aminosilanes of the general formula III
Implementation Method 2
The product of the process can contain oligomers which are formed by hydrolysis and condensation of the alkoxysilane functions of the silicon-containing azobiscarbamides of the general formula I
Data Source
AI summary
The invention relates to a process for preparing silicon-containing azodicarbamides of the general formula (I) (R1)3-a(R2)aSi-RI-NH-C(O)-N=N-C(O)-NH-RI-Si(R1)3-a(R2)a (I), by reaction of azobiscarboxy compounds of the general formula II R3-X1-C(O)-N=N-C(O)-X1-R4 (II) with aminosilanes of the general formula III (R1)3-a(R2)aSi-RI-NH2 (III).