Polyimide material, and its preparing method and use

A polyimide and polyamic acid technology, applied in the field of polyimide materials, can solve the problem of reducing the reactivity of aromatic diamines, low dielectric constant glass transition temperature, and difficulty in obtaining high molecular weight polyimide polymerization In order to achieve the effects of excellent solubility, excellent mechanical properties and electrical insulation properties, and excellent transparency of visible light

Inactive Publication Date: 2005-02-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hongham[G.Hougham and G.Tesoro.Polym.Mater.Sci.Eng.1989,61,369] etc. have reported polyimide materials prepared from perfluoroaromatic diamines; Low dielectric constant (2.75) and high glass transition temperature (T g >330°C); however, since the introduction of fluorine atoms greatly reduces the reactivity of aromatic diamines, it is difficult to obtain polyimide polymer materials with high molecular weight and excellent performance

Method used

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  • Polyimide material, and its preparing method and use
  • Polyimide material, and its preparing method and use
  • Polyimide material, and its preparing method and use

Examples

Experimental program
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Effect test

example 1

[0031] 4-phenyl-2,6 bis(4-hydroxy-phenyl)-pyridine: In the three-necked flask equipped with mechanical stirring, condenser and nitrogen inlet and outlet, add 530 parts of benzaldehyde and 250 parts of p-hydroxyacetophenone , 1000 parts of ammonium acetate, 2000ml of glacial acetic acid. The reaction mixture was refluxed for 4-6 hours with stirring to obtain a homogeneous orange-red solution, which was poured into 4000 ml of water to obtain a yellow-brown precipitate. Collect the precipitate by filtration and wash it with water 3 times to obtain the crude product; dissolve the crude product in 1000ml 2 / 1 tetrahydrofuran / petroleum ether mixed solvent, collect the filtrate by filtration; freeze the filtrate overnight in the refrigerator below -15°C, and filter to obtain light yellow Powdered 4-phenyl-2,6-bis(4-hydroxy-phenyl)-pyridine.

[0032]4-phenyl-2,6-bis(4-(4-nitro-2-trifluoromethyl-phenoxy)-phenyl)pyridine: 100 parts of 4-phenyl-2,6-bis(4 -Hydroxy-phenyl)-pyridine and 30...

example 2

[0035] 4-(4-trifluoromethylphenyl)-2,6 bis(4-hydroxyl-phenyl)-pyridine: Add p-trifluoro 1050 parts of methyl benzaldehyde, 300 parts of p-hydroxyacetophenone, 1000 parts of ammonium acetate, 1200 ml of glacial acetic acid. The reaction mixture was refluxed for 4-5 hours with stirring to obtain a homogeneous orange-red solution, which was poured into 6000 ml of water to obtain a yellow-brown precipitate. The precipitate was collected by filtration and washed with water to obtain a crude product; recrystallized from acetone to obtain light yellow powder 4-(4-trifluoromethylphenyl)-2,6bis(4-hydroxy-phenyl)-pyridine.

[0036] 4-(4-trifluoromethylphenyl)-2,6-bis(4-(4-nitro-2-trifluoromethyl-phenoxy)-phenyl)pyridine: 240 parts of 4-( 4-trifluoromethylphenyl)-2,6 bis(4-hydroxy-phenyl)-pyridine and 60 parts of potassium hydroxide, 1000ml dimethyl sulfoxide, 600ml toluene were added equipped with mechanical stirring, thermometer, reflux condensation Pipe, water separator and three-ne...

example 3

[0039] 4-(3', 5'-bistrifluoromethylphenyl)-2,6 bis(4-hydroxyl-phenyl)-pyridine: in a three-neck flask equipped with mechanical stirring, condenser and nitrogen inlet and outlet, Add 1200 parts of 3',5'-bistrifluoromethylbenzaldehyde, 250 parts of p-hydroxyacetophenone, 1000 parts of ammonium acetate and 2000 ml of glacial acetic acid. The reaction mixture was refluxed for 4-6 hours under stirring to obtain an orange-red homogeneous clear solution, which was poured into 5200 ml of water to obtain a yellow-brown precipitate. The precipitate was collected by filtration and washed 3 times with water to obtain a crude product; the crude product was recrystallized from a mixed solvent of diethyl ether / petroleum ether to obtain light yellow powder 4-(3',5'-bistrifluoromethylphenyl)-2 , 6 bis(4-hydroxy-phenyl)-pyridine.

[0040] 4-(3', 5'-bistrifluoromethylphenyl)-2,6-bis(4-(4-nitro-2-trifluoromethyl-phenoxy)-phenyl)pyridine: the 230 parts of 4-phenyl-2,6 bis(4-hydroxy-phenyl)-pyrid...

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Abstract

A kind of polyimide material will produce pyridine diphenol and its ramification by condensation reaction between hydroxyl hypnone and substituted benzaldehyde. The etherification reaction will occur to the products and 3-nitryl-near chlorine benzotrifluoride and will derive binitro compound. The binitro compound will be deoxidized into diamine monomer of aromatic trifluoromethyl by the ethanol solution of iron dust/HCl. This monomer will derive polyamic acid solution by adding molecular weight regulator, assistant adhesive and aromatic tetracid dual-anhydride. The polyamic acid solution will become into aromatic polyimide after being processed by chemical imine or heat imine.

Description

technical field [0001] The invention relates to a polyimide material. [0002] The present invention also relates to a preparation method of the above-mentioned polyimide material. [0003] The present invention also relates to the application of the above-mentioned polyimide material. Background technique [0004] Polyimide materials have excellent comprehensive properties and are increasingly widely used in aerospace, aviation, space, microelectronics, and electrical appliances. As a functional material, polyimide materials must have properties that can meet special application purposes on the basis of existing comprehensive properties; for example, as VLSI and microelectronic packaging materials, polyimide materials must not only In addition to high thermal stability, high mechanical properties, high electrical insulation, low dielectric constant, low dielectric loss, etc., it must also have the advantages of high solubility, low moisture absorption, low expansion coeff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
Inventor 杨士勇尚玉明范琳
Owner INST OF CHEM CHINESE ACAD OF SCI
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