36978-41-3 Usage
Description
2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE, also known as BTDA, is an organic compound that serves as a key monomer in the production of polyimide materials. It is characterized by its chemical structure, which features two biphenyl groups connected through their 2,3,3', and 4' positions by carbonyl groups. BTDA is known for its high thermal stability and excellent mechanical properties, making it a valuable component in various industrial applications.
Uses
Used in Polymer Industry:
2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE is used as a monomer for the synthesis of polyimide materials due to its high thermal stability and excellent mechanical properties. These polyimide materials are known for their exceptional performance in high-temperature environments and are widely used in applications such as aerospace, electronics, and automotive industries.
Used in Electronics Industry:
In the electronics industry, 2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE is used as a precursor for the production of polyimide films and coatings. These materials are valued for their excellent electrical insulation properties, high-temperature resistance, and mechanical strength, making them ideal for use in various electronic components and devices, such as flexible circuits, insulating layers, and protective coatings.
Used in Aerospace Industry:
2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE is used as a key component in the development of high-performance composite materials for aerospace applications. The resulting polyimide materials offer superior thermal stability, mechanical strength, and resistance to environmental factors, making them suitable for use in aircraft components, such as heat shields, engine parts, and structural elements.
Used in Automotive Industry:
In the automotive industry, 2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE is utilized in the production of polyimide-based materials for high-temperature applications. These materials are employed in components such as engine seals, gaskets, and insulating layers, where their thermal stability and mechanical properties are crucial for performance and reliability.
Overall, 2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE plays a significant role in the development and production of polyimide materials across various industries, thanks to its unique properties and versatile applications.
Preparation
The preparation of 2,3,3',4'-biphenyl tetracarboxylic dianhydride is as follows:In a 1000 ml three-necked flask, 18.3 g (0.1 mol) of 4-chlorophthalic anhydride and 18.3 g (0.1 mol) were added 3-chlorophthalic anhydride, 300 g of anisole as solvent, 0.13 g (0.001 mol) of nickel chloride as a catalyst, 0.198 g (0.001 mol) of C-1 as a catalyst ligand, and 0.03 g (0.0003 mol) of sodium bromide as a catalyst Auxiliary, 13 g (0.2 mol) of zinc powder was used as a reducing agent, and the reaction was stirred at 30 ° C for 8 hours under a nitrogen atmosphere. The reaction solution was filtered to remove insoluble solids in the reaction liquid. 300 g of methanol was added to the filtration mother liquor, and the product was precipitated, filtered, and dried to obtain 25.8 g of the product 2,3,3',4'-biphenyltetracarboxylic dianhydride, yield 87.7%.
Check Digit Verification of cas no
The CAS Registry Mumber 36978-41-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,6,9,7 and 8 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 36978-41:
(7*3)+(6*6)+(5*9)+(4*7)+(3*8)+(2*4)+(1*1)=163
163 % 10 = 3
So 36978-41-3 is a valid CAS Registry Number.
36978-41-3Relevant articles and documents
Preparation and separation method of biphenyldianhydride isomer
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, (2021/10/05)
The method mainly comprises the following steps: taking nickel salt as a catalyst, coupling with zinc as a reducing agent, coupling with an aliphatic 3 - chloronaphthalimide and an aryl 4 - chlorosuccinimide mixture as a raw material to generate a biphenyl dianhydride derivative, and separating by using different solubility parameters and obtaining 3 and 4 ’ - respectively. 3,3 ’ - And 4, 4 ’ - biphenyl derivatives are hydrolyzed and dehydrated to obtain three biphenyldianhydride isomers, and the patent application is characterized in that a simple method for separating the three biphenyltetracarboxylic dianhydride intermediate is established.
Method for preparing biphenyldianhydride isomer by ultrasonic-assisted catalytic coupling
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Paragraph 0024; 0026; 0028; 0030; 0032; 0034, (2021/11/06)
The invention discloses a method for preparing biphenyldianhydride isomers through ultrasonic-assisted catalytic coupling. The main contents include a mixture of a nickel salt catalyst and zinc as a reducing agent, 2-THF used as a solvent, an aryl (or methyl) N - chloronaphthalimide and -4 - propyl (or isopropyl) N - chlorodifluoroimide, under -3 - by means of an ultrasonic-assisted catalytic coupling reaction 60 - 100 °C 0.5 - 3 hours. The separation and purification of the three biphenyltetracarboxylic acid isomers are realized by using different solubility parameters, and the biphenyldianhydride isomer pure product is finally obtained. The invention is characterized in that a simple method for separating the three biphenyltetracarboxylic acid isomers is established, the problem of difficulty in separation of the three biphenyl dianhydride mixtures is solved, and 3,4 - biphenyl dianhydride ’ with an asymmetric structure is obtained at lower cost.
Preparation method for biphenyltetracarboxylic dianhydride mixture
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Paragraph 0030; 0031, (2016/10/09)
The invention relates to a preparation method for a biphenyltetracarboxylic dianhydride mixture. The preparation method comprises the following steps: with phthalic acid as a starting raw material, carrying out an electrophilic substitution reaction so as to produce a phthalic acid derivative; then subjecting the derivative to esterification so as to produce phthalate; further catalyzing phthalate and carrying out a coupling reaction so as to produce a biphenyl tetraformate mixture; and finally, successively carrying out saponification and acidification so as to produce the product biphenyltetracarboxylic dianhydride mixture. The method provided by the invention uses cheap and easily phthalic acid as the starting raw material and is a novel low-cost easily-operatable environment-friendly production method for biphenyltetracarboxylic dianhydride; moreover, isomeric compounds of all the biphenyltetracarboxylic dianhydride are synthesized at one time in the invention, so efficiency is improved and the cost is reduced.
