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Amino silicone oil modified polyimide foam material and preparation method thereof

A technology of polyimide and amino silicone oil, which is applied in the field of amino silicone oil modified polyimide foam material and its preparation, can solve the problem of less research on polyimide foam material and the like, and achieves uniform cells and excellent flexibility. performance, low production cost

Active Publication Date: 2021-04-02
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Diamino silicone oil has excellent heat resistance, electrical insulation, weather resistance, and hydrophobicity, and is often used as special materials in aviation, cutting-edge technology, and military technology departments. At the same time, various polymer materials modified by diamino silicone oil are also obtained. It has been widely used, but there are few studies on amino silicone oil modified polyimide foam materials

Method used

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  • Amino silicone oil modified polyimide foam material and preparation method thereof
  • Amino silicone oil modified polyimide foam material and preparation method thereof
  • Amino silicone oil modified polyimide foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of amino silicone oil modified polyimide foam material, comprising the following steps:

[0040] (1) In a 1000mL three-neck flask equipped with mechanical stirring and a condenser, add 32.54g (0.138 mol) of 4,4'-diaminodiphenyl ether, 17.73g (0.162mol) of 2,6'-diamino Pyridine, 4.8g (0.025mol) of polymethylsiloxane diamine (Mw=192), 66.39g of N,N-dimethylformamide, 66.39g of tetrahydrofuran and 69g of dimethyl sulfoxide (organic solvent content is 50wt%), stirred until completely dissolved, then slowly added 54.53g (0.25mol) of pyromellitic dianhydride and 89.57g (0.25mol) of 3,3',4,4'-diphenylsulfone tetra Carboxylic acid dianhydride was stirred to obtain dark brown polyimide acid precursor solution after stirring for 5 hours;

[0041] (2) take by weighing 50g above-mentioned polyimide acid precursor solution, add the polytetramethylene ether glycol (Mw=650) of 5g; The triethylamine of 0.5g and the pyridine of 0.5g are as catalyst (catalyst content ...

Embodiment 2

[0053] A preparation method of amino silicone oil modified polyimide foam material, comprising the following steps:

[0054] (1) In a 500mL three-necked flask equipped with mechanical stirring and a condenser, add 10.8g (0.1mol) of m-phenylenediamine, 10.8g (0.1mol) of p-phenylenediamine, 21.2g (0.1mol) of 4 , 4'-bis(3-aminophenoxy)biphenyl, 33g (0.15mol) of polymethylsiloxane diamine (Mw=220), 50g of N-methylpyrrolidone, 51g of ethylene glycol diamine Methyl ether and 50g of propylene glycol dimethyl ether (organic solvent content is 60wt%), stirred until completely dissolved, then slowly added 77.56g (0.25mol) of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride , 73.56 g (0.25mol) of 2,3,3',4'-diphenyl ether tetracarboxylic dianhydride was stirred for 5 hours to obtain a dark brown polyimide acid precursor solution;

[0055] (2) Weigh 60g of the above-mentioned polyimide acid precursor solution, add 4.2g of polytetramethylene ether glycol (Mw=800); 1g of pyridine, 1g of...

Embodiment 3

[0061] A preparation method of amino silicone oil modified polyimide foam material, comprising the following steps:

[0062] (1) In a 1000mL three-necked flask equipped with mechanical stirring and a condenser, add 84.5g (0.16mol) of bisphenol A diether diamine, 40.35g (0.16mol) of 4,4'-diaminodiphenyl Sulfone, 13.06g (0.00653mol) of polymethylsiloxane diamine (Mw=2000), 200g of N,N-dimethylacetamide and 220g of toluene (organic solvent content is 40wt%), stirred until complete After dissolving, slowly add 142.4g (0.653mol) of pyromellitic dianhydride and stir to obtain dark brown polyimide acid precursor solution after stirring for 5h;

[0063] (2) Take by weighing 60g of the above polyimide acid precursor solution, add 6g of polyethylene glycol (Mw=800); 1.5g of stannous chloride, 1g of stannous octoate and 0.5g of methylmorpholine It is a catalyst (the total catalyst content is 5wt%); the polyoxyethylene ether type nonionic fluorocarbon surfactant of 7.2g is a foam stabili...

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Abstract

The invention discloses an amino silicone oil modified polyimide foam material and a preparation method thereof, and belongs to the technical field of high polymer materials. The method comprises thefollowing steps: 1) mixing and reacting a dianhydride compound, diamino silicone oil and other diamine compounds in an organic polar solvent to obtain a modified polyimide acid precursor; 2) mixing and stirring the modified polyimide acid precursor, a catalyst, low molecular weight diol, a foam stabilizer, a foam stabilizer and polyisocyanate, and foaming at 0-80 DEG C to obtain a foaming material; and 3) heating the foam material to 160-280 DEG C, and curing for 1-72 hours to obtain the amino silicone oil modified polyimide foam material. The amino silicone oil modified polyimide foam material has more excellent flexibility, more uniform foam holes and excellent high-temperature resistance, is simple in preparation process, lower in production cost and more convenient to use, and can be applied to the fields of electronics, communication, military affairs and the like, particularly to the field of aerospace and aviation.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an amino silicone oil modified polyimide foam material and a preparation method thereof. Background technique [0002] Foam materials are a kind of polymer materials formed by a large number of gas micropores dispersed in solid materials. Because of their unique structure, they have the advantages of light weight, heat insulation, sound absorption and excellent dielectric properties, and have been widely used. In construction, packaging, aircraft and automobiles and other fields. [0003] However, traditional foam materials are suitable for low temperature and poor high temperature resistance, while polyimide polymer materials have excellent mechanical strength, high temperature resistance, radiation resistance and corrosion resistance, so in recent years, polyimide foam materials have become more popular The development is very rapid. At present, polyimide...

Claims

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Application Information

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IPC IPC(8): C08G18/64C08G18/48C08G18/42C08G73/10C08G101/00
CPCC08G18/4081C08G18/6438C08G18/4854C08G18/4833C08G18/4277C08G73/1085C08G73/1007C08G73/1075C08G73/106C08G2101/00
Inventor 袭锴徐阳
Owner NANJING UNIV